# Peasy Video — Full Catalog > Video tools made easy. Peasy Video provides free browser-based tools at https://peasyvideo.com/. All processing happens client-side — files never leave your device. ## Tools (15) ### Resolution Reference Complete reference guide for video resolutions from 360p to 8K. Includes pixel dimensions, aspect ratios, megapixel counts, and typical bitrate recommendations. - URL: https://peasyvideo.com/video/video-resolution/ - Category: Video Tools - Processing: client ### Bitrate Calculator Calculate recommended video bitrates and estimated file sizes for H.264, H.265, VP9, and AV1 codecs at multiple quality tiers. - URL: https://peasyvideo.com/video/video-bitrate/ - Category: Video Tools - Processing: client ### Frame Rate Converter Calculate frame rate conversions, frame intervals, and speed changes between common rates like 24fps, 29.97fps, 30fps, and 60fps. - URL: https://peasyvideo.com/video/video-framerate/ - Category: Video Tools - Processing: client ### Timecode Calculator Convert between SMPTE timecodes, frame numbers, seconds, and milliseconds. Supports drop-frame timecode for 29.97fps. - URL: https://peasyvideo.com/video/video-timecode/ - Category: Video Tools - Processing: client ### Aspect Ratio Calculator Calculate and convert video aspect ratios. Enter dimensions like 1920×1080 or ratios like 16:9 to see simplified ratios and pixel dimensions at various resolutions. - URL: https://peasyvideo.com/video/video-aspect-ratio/ - Category: Video Tools - Processing: client ### File Size Estimator Estimate video file sizes based on duration, resolution, and codec. Compare sizes across quality presets for storage and bandwidth planning. - URL: https://peasyvideo.com/video/video-filesize/ - Category: Video Tools - Processing: client ### Speed & Slow-Mo Calculator Calculate video speed changes, slow-motion requirements, and resulting durations. Find the source frame rate needed for smooth slow-motion. - URL: https://peasyvideo.com/video/video-speed/ - Category: Video Tools - Processing: client ### Storage Planner Calculate how much video fits on a given drive or memory card at different resolutions and quality levels. - URL: https://peasyvideo.com/video/video-storage/ - Category: Video Tools - Processing: client ### Subtitle Time Converter Convert and offset subtitle timestamps between SRT, VTT, and frame-based formats. Shift timestamps to sync subtitles with video. - URL: https://peasyvideo.com/video/video-subtitle-time/ - Category: Video Tools - Processing: client ### Bandwidth Calculator Calculate what video quality your internet bandwidth can support. See maximum resolution, frame rate, and codec options for any connection speed. - URL: https://peasyvideo.com/video/video-bandwidth/ - Category: Video Tools - Processing: client ### Color Space Reference Reference guide for video color spaces including Rec. 709, Rec. 2020, DCI-P3, HDR10, HLG, and Dolby Vision. - URL: https://peasyvideo.com/video/video-color-space/ - Category: Video Tools - Processing: client ### Codec Reference Compare video codecs — H.264, H.265, VP9, AV1, ProRes, DNxHR — with quality, file size, browser support, and hardware decoding details. - URL: https://peasyvideo.com/video/video-codec/ - Category: Video Tools - Processing: client ### Platform Specs Guide Video upload specs for YouTube, TikTok, Instagram, Twitter, LinkedIn, Vimeo, and Twitch. Resolution, duration, file size, and recommended settings. - URL: https://peasyvideo.com/video/video-platform/ - Category: Video Tools - Processing: client ### Chroma Subsampling Guide Understand chroma subsampling (4:4:4, 4:2:2, 4:2:0) with visual diagrams, bandwidth savings, and use cases for broadcast, editing, and web. - URL: https://peasyvideo.com/video/video-chroma/ - Category: Video Tools - Processing: client ### Screen Recording Guide Recommended screen recording settings for presentations, tutorials, gaming, and demos. Get optimal resolution, framerate, codec, and bitrate. - URL: https://peasyvideo.com/video/video-screen-record/ - Category: Video Tools - Processing: client ## Guides (46) ### Video Codecs Explained: H.264, H.265, VP9, and AV1 Video codecs determine file size, quality, and compatibility. This guide compares the major codecs, from the ubiquitous H.264 to the next-generation AV1, to help you choose the right one for your project. - URL: https://peasyvideo.com/guides/video-codecs-explained/ - Category: Comparison - Reading time: 1 min - Words: 233 Key takeaways: - A codec (coder-decoder) compresses raw video data into a manageable file size. - H.264 has been the dominant video codec since 2003. - H.265 achieves 40-50% better compression than H.264 at equivalent quality. - VP9 is Google's royalty-free codec, roughly matching H.265 in efficiency. - AV1 offers 30% better compression than VP9/H.265. ## What Is a Video Codec? A codec (coder-decoder) compresses raw video data into a manageable file size. Without compression, one minute of 1080p video would be about 10 GB. Modern codecs reduce this to 50-150 MB with minimal quality loss. ## H.264 (AVC): The Universal Standard H.264 has been the dominant video codec since 2003. It's supported by every browser, every device, and every video platform. Hardware encoding and decoding are universal. **Best for:** Maximum compatibility, live streaming, video conferencing. ## H.265 (HEVC): Better Compression H.265 achieves 40-50% better compression than H.264 at equivalent quality. However, it's encumbered by patents and licensing fees, limiting adoption. **Best for:** 4K video, storage-constrained environments, Apple ecosystem. ## VP9: Google's Free Alternative VP9 is Google's royalty-free codec, roughly matching H.265 in efficiency. It's the primary codec for YouTube and is supported in most modern browsers. **Best for:** YouTube uploads, web video, Chrome-focused distribution. ## AV1: The Future AV1 offers 30% better compression than VP9/H.265. It's royalty-free and backed by major tech companies. Hardware decoding support is growing rapidly. **Best for:** Next-generation streaming, bandwidth-limited distribution. ## Quick Reference | Codec | Efficiency | Licensing | Browser Support | |-------|-----------|-----------|----------------| | H.264 | Baseline | Capped royalties | 99%+ | | H.265 | +40-50% | Complex licensing | ~75% | | VP9 | +40-50% | Royalty-free | ~95% | | AV1 | +60-70% | Royalty-free | ~85% | ### File Format Conversion: A Complete Guide Converting files between formats is a daily task for professionals across every industry. This comprehensive guide covers document, image, audio, and video conversion principles that apply regardless of the specific tool. - URL: https://peasyvideo.com/guides/file-format-conversion-guide/ - Category: How-To - Reading time: 1 min - Words: 224 Key takeaways: - Regardless of the file type, certain principles apply to all conversions. - The most important concept in format conversion is whether data is lost: - Some features don't transfer between formats: - For converting many files at once: - Client-side conversion (in-browser) provides better privacy since files never leave your device. ## Universal Conversion Principles Regardless of the file type, certain principles apply to all conversions. ## Lossy vs Lossless The most important concept in format conversion is whether data is lost: - **Lossless**: FLAC to WAV, PNG to BMP — no quality loss, fully reversible. - **Lossy**: WAV to MP3, PNG to JPEG — some data is permanently discarded. - **Transcoding**: MP3 to AAC — compound quality loss from re-compression. **Golden rule:** Always convert from the highest quality source available. Never convert between lossy formats if you can avoid it. ## Feature Compatibility Some features don't transfer between formats: | Source Feature | May Be Lost In | |---------------|---------------| | Transparency (PNG) | JPEG | | Layers (PSD) | PNG, JPEG | | Formulas (XLSX) | CSV | | Hyperlinks (DOCX) | Plain text | | Animations (GIF) | PNG, JPEG | | Metadata (EXIF) | Varies by tool | ## Batch Conversion For converting many files at once: 1. **Test first**: Convert a small sample and verify quality. 2. **Consistent settings**: Apply the same parameters to all files. 3. **Preserve originals**: Never overwrite source files. 4. **Naming conventions**: Use consistent output file naming. ## Client-Side vs Server-Side Client-side conversion (in-browser) provides better privacy since files never leave your device. Server-side conversion typically handles larger files and more formats but requires uploading your data. ### Video Codec Comparison: H.264 vs H.265 vs VP9 vs AV1 Four dominant video codecs compete for web delivery and streaming. Each balances compression efficiency, encoding speed, and browser support differently. This guide helps you choose the right codec. - URL: https://peasyvideo.com/guides/video-codec-comparison-h264-h265-vp9-av1/ - Category: Comparison - Reading time: 2 min - Words: 336 Key takeaways: - A codec (coder-decoder) compresses raw video into a manageable file size and decompresses it for playback. - Released in 2003, H.264 remains the most widely supported codec. - H.265 achieves roughly 50% better compression than H.264. - Google's royalty-free answer to H.265. - The newest codec, developed by the Alliance for Open Media. ## Understanding Video Codecs A codec (coder-decoder) compresses raw video into a manageable file size and decompresses it for playback. The codec determines quality-per-bit — better codecs produce smaller files at the same visual quality. ## H.264 (AVC) Released in 2003, H.264 remains the most widely supported codec. Every browser, device, and hardware decoder supports it. Encoding is fast and well-optimized after two decades of development. **Best for:** Maximum compatibility, real-time encoding, legacy device support. **Drawback:** 30-50% larger files than newer codecs at equivalent quality. ## H.265 (HEVC) H.265 achieves roughly 50% better compression than H.264. However, it carries licensing fees and limited browser support — only Safari and Edge support it natively. Chrome and Firefox do not. **Best for:** Apple ecosystem, 4K/HDR content, offline playback. **Drawback:** Patent licensing costs, poor browser support. ## VP9 Google's royalty-free answer to H.265. VP9 achieves similar compression to HEVC and is supported in Chrome, Firefox, and Edge. YouTube uses VP9 extensively for its streaming pipeline. **Best for:** Web delivery, YouTube, royalty-free workflows. **Drawback:** Slower encoding than H.264, no Safari support. ## AV1 The newest codec, developed by the Alliance for Open Media. AV1 achieves 30% better compression than VP9 and is royalty-free. Browser support is growing (Chrome, Firefox, Safari 17+). **Best for:** Future-proof delivery, maximum compression. **Drawback:** Very slow encoding (10-100x slower than H.264). Hardware encoders are still emerging. ## Comparison Table | Feature | H.264 | H.265 | VP9 | AV1 | |---------|-------|-------|-----|-----| | Compression | Baseline | +50% | +50% | +65% | | Browser support | 99%+ | Safari/Edge | 95%+ | ~90% | | Royalty-free | No* | No | Yes | Yes | | Encoding speed | Fast | Moderate | Slow | Very slow | | HDR support | Limited | Yes | Yes | Yes | … ### Video Compression for Web: Reducing File Size Without Losing Quality Large video files slow page loads and consume bandwidth. Effective compression balances visual quality with file size using the right codec settings, resolution, and bitrate. - URL: https://peasyvideo.com/guides/video-compression-web-delivery/ - Category: How-To - Reading time: 1 min - Words: 281 Key takeaways: - An uncompressed 1080p video at 30fps generates about 178 MB per second. - Higher resolution means more pixels to encode. - Two-pass encoding analyzes the entire video first, then allocates bits optimally. - Always use VBR over constant bitrate (CBR) for web ## Why Video Compression Matters An uncompressed 1080p video at 30fps generates about 178 MB per second. Compression reduces this by 100-1000x while preserving acceptable visual quality. The goal is finding the lowest bitrate where compression artifacts remain invisible to viewers. ## Key Parameters ### Resolution Higher resolution means more pixels to encode. Downscaling from 4K to 1080p can halve file size with negligible quality loss on most screens. Match resolution to your delivery context — mobile viewers rarely benefit from resolutions above 720p. ### Bitrate Bitrate controls how many bits per second the encoder allocates. Higher bitrate means better quality but larger files. Use variable bitrate (VBR) to allocate more bits to complex scenes and fewer to static ones. **Recommended web bitrates:** | Resolution | Bitrate (H.264) | Bitrate (VP9/AV1) | |------------|-----------------|-------------------| | 480p | 1-2 Mbps | 0.7-1.5 Mbps | | 720p | 2.5-5 Mbps | 1.5-3 Mbps | | 1080p | 5-8 Mbps | 3-5 Mbps | | 4K | 15-25 Mbps | 8-15 Mbps | ### Constant Rate Factor (CRF) CRF is the simplest quality control. Lower values mean higher quality (and larger files). For H.264, CRF 23 is the default; 18-20 is visually lossless. For VP9, CRF 31 is a good starting point. ## Two-Pass Encoding Two-pass encoding analyzes the entire video first, then allocates bits optimally. This produces better quality than single-pass at the same file size but takes twice as long to encode. ## Practical Tips - Always use VBR over constant bitrate (CBR) for web - Set a maximum bitrate cap to prevent bandwidth spikes - Use keyframe intervals of 2-4 seconds for streaming - Test on slow connections (3G simulation) before publishing ### GIF Creation and Optimization: Size, Quality, and Alternatives GIFs remain popular for short animations despite their technical limitations. This guide covers creation, optimization, and modern alternatives like WebP and MP4. - URL: https://peasyvideo.com/guides/gif-creation-optimization-guide/ - Category: How-To - Reading time: 1 min - Words: 249 Key takeaways: - GIF uses a 256-color palette and lossless frame compression from 1987. - GIF file size scales quadratically with dimensions. - GIFs remain useful for email (broad client support), Slack/Discord reactions (platform auto-play), and simple UI animations under 100 KB. ## GIF Limitations GIF uses a 256-color palette and lossless frame compression from 1987. This makes it extremely inefficient for photographic content — a 5-second GIF can easily exceed 10 MB while an equivalent MP4 might be 200 KB. ## Creating Optimized GIFs ### Reduce Dimensions GIF file size scales quadratically with dimensions. A 480px-wide GIF is 4x smaller than a 960px version. Keep GIFs under 500px wide for web use. ### Limit Frame Rate Most GIF viewers display at 10-15fps regardless of the encoded frame rate. Dropping from 30fps to 12fps cuts file size by 60% with minimal perceived quality loss. ### Reduce Colors GIF supports up to 256 colors per frame. Reducing to 64 or 128 colors can halve file size. Use dithering to simulate missing colors. ### Optimize Frame Disposal Use frame differencing — only encode pixels that change between frames. Tools like Gifsicle automate this optimization and can reduce size by 20-40%. ## Modern Alternatives | Format | Size vs GIF | Browser Support | Transparency | |--------|-------------|-----------------|-------------| | WebP (animated) | 50-80% smaller | 97%+ | Yes | | APNG | 20-50% smaller | 97%+ | Yes (full) | | MP4 (looped) | 90-95% smaller | 99%+ | No | | AVIF (animated) | 85-95% smaller | ~93% | Yes | ## When to Use GIF GIFs remain useful for email (broad client support), Slack/Discord reactions (platform auto-play), and simple UI animations under 100 KB. For everything else, prefer looped MP4 or animated WebP. ### How to Compress Video for Web Streaming Properly compressed video loads faster, buffers less, and saves bandwidth. Learn how to find the sweet spot between quality and file size for web delivery across desktop and mobile devices. - URL: https://peasyvideo.com/guides/compress-video-web-streaming/ - Category: How-To - Reading time: 1 min - Words: 224 Key takeaways: - Video compression works by removing temporal redundancy (similar frames) and spatial redundancy (similar pixels within frames). - Bitrate is the amount of data per second. - Two-pass encoding analyzes the entire video first, then compresses it with optimal bitrate allocation. - For web delivery, encode multiple quality versions and use adaptive bitrate streaming (HLS or DASH) to serve the appropriate quality based on the viewer's connection speed. ## Video Compression Fundamentals Video compression works by removing temporal redundancy (similar frames) and spatial redundancy (similar pixels within frames). The challenge is removing enough data to reduce file size without visible quality loss. ## Key Parameters ### Bitrate Bitrate is the amount of data per second. Higher bitrate means better quality but larger files. Use variable bitrate (VBR) to allocate more data to complex scenes and less to static ones. | Resolution | Recommended Bitrate (H.264) | |-----------|---------------------------| | 480p | 1,000-2,500 kbps | | 720p | 2,500-5,000 kbps | | 1080p | 5,000-10,000 kbps | | 4K | 15,000-30,000 kbps | ### Resolution Don't upscale — if your source is 720p, don't export at 1080p. Upscaling increases file size without adding detail. ### Frame Rate 24 fps is standard for film, 30 fps for web video, and 60 fps for gaming and sports content. Higher frame rates double the data for minimal perceptual benefit in most content. ## Two-Pass Encoding Two-pass encoding analyzes the entire video first, then compresses it with optimal bitrate allocation. It takes twice as long but produces significantly better quality at the same file size compared to single-pass. ## Adaptive Bitrate Streaming For web delivery, encode multiple quality versions and use adaptive bitrate streaming (HLS or DASH) to serve the appropriate quality based on the viewer's connection speed. ### How to Create GIFs From Video Clips GIFs remain popular for short animations, tutorials, and social media despite their technical limitations. This guide covers how to create optimized GIFs from video clips with reasonable file sizes. - URL: https://peasyvideo.com/guides/create-gifs-from-video/ - Category: How-To - Reading time: 1 min - Words: 249 Key takeaways: - Despite being a format from 1987, GIFs are ubiquitous in messaging, social media, documentation, and issue trackers. - GIF file size scales quadratically with resolution. - Crop to only the relevant area (don't capture full screen if you need a small region). - Consider using MP4/WebM video with autoplay instead of GIF. ## GIF: Still Relevant in 2025 Despite being a format from 1987, GIFs are ubiquitous in messaging, social media, documentation, and issue trackers. Their autoplay behavior and universal support make them the default for short animations. ## Creating GIFs From Video ### Step 1: Select Your Clip Keep GIFs under 10 seconds. Shorter clips have smaller file sizes and loop more naturally. Identify the exact start and end frames you want. ### Step 2: Choose Resolution GIF file size scales quadratically with resolution. A 640px wide GIF is often 4x larger than a 320px one. For most web use, 480-640px width is sufficient. ### Step 3: Set Frame Rate Reduce frame rate to 10-15 fps for most GIFs. The human eye perceives smooth motion at 12 fps, and every dropped frame significantly reduces file size. ### Step 4: Optimize Colors GIFs support a maximum of 256 colors per frame. Reduce to 128 or 64 colors when possible. Dithering can create the illusion of more colors. ## Size Optimization Tips - Crop to only the relevant area (don't capture full screen if you need a small region). - Minimize motion — GIFs with lots of changing pixels compress poorly. - Use lossy GIF optimization tools that introduce minor artifacts for major size reduction. ## Modern Alternatives Consider using MP4/WebM video with autoplay instead of GIF. A 10-second GIF might be 5 MB while the equivalent MP4 is 200 KB. Most platforms now support auto-playing muted videos in place of GIFs. ### Social Media Video Specifications by Platform Each social platform has specific requirements for video dimensions, duration, file size, and format. Uploading video that doesn't meet these specs results in rejected uploads or quality degradation. - URL: https://peasyvideo.com/guides/social-media-video-specs/ - Category: How-To - Reading time: 1 min - Words: 241 Key takeaways: - Social platforms re-encode uploaded videos regardless of input format. - Format**: MP4 with H.264 video and AAC audio. - - Safe zones: Keep important content away from edges where UI elements overlay. ## Platform-Specific Requirements Social platforms re-encode uploaded videos regardless of input format. However, uploading video that matches their specs minimizes quality loss during transcoding. ## Instagram | Type | Duration | Resolution | Aspect Ratio | |------|----------|-----------|-------------| | Feed video | 3-60 sec | 1080px wide | 1:1, 4:5, 16:9 | | Reel | 15-90 sec | 1080x1920 | 9:16 | | Story | Up to 60 sec | 1080x1920 | 9:16 | | IGTV | Up to 60 min | 1080x1920 | 9:16 | ## TikTok | Type | Duration | Resolution | Aspect Ratio | |------|----------|-----------|-------------| | Video | 15 sec - 10 min | 1080x1920 | 9:16 | | Max file size | 287 MB (iOS), 72 MB (Android) | — | — | ## YouTube | Type | Resolution | Aspect Ratio | Frame Rate | |------|-----------|-------------|------------| | Standard | 1920x1080 | 16:9 | 24-60 fps | | Shorts | 1080x1920 | 9:16 | 24-60 fps | | 4K | 3840x2160 | 16:9 | 24-60 fps | ## Universal Best Practices - **Format**: MP4 with H.264 video and AAC audio. - **Bitrate**: Follow platform recommendations (too low = poor quality, too high = slow upload). - **Captions**: Add text captions — 85% of Facebook video is watched on mute. - **First 3 seconds**: Hook viewers immediately (most scrolling happens in the first 3 seconds). - **Safe zones**: Keep important content away from edges where UI elements overlay. ### Best Practices for Video Thumbnails and Previews Thumbnails are the first thing viewers see and directly impact click-through rates. Learn how to create effective video thumbnails and animated previews that attract viewers and accurately represent your content. - URL: https://peasyvideo.com/guides/video-thumbnails-best-practices/ - Category: Best Practice - Reading time: 1 min - Words: 235 Key takeaways: - YouTube data shows that 90% of top-performing videos use custom thumbnails. - YouTube recommends 1280x720px (16:9 aspect ratio) at minimum. - Many platforms show a short animated preview on hover. - Test different thumbnail designs for important videos. - Always design at this size or larger. ## Thumbnails Drive Clicks YouTube data shows that 90% of top-performing videos use custom thumbnails. A well-designed thumbnail can increase click-through rates by 30% or more. ## Thumbnail Design Principles ### Size and Resolution YouTube recommends 1280x720px (16:9 aspect ratio) at minimum. Always design at this size or larger. Remember that thumbnails are often displayed at very small sizes on mobile devices. ### Visual Hierarchy Effective thumbnails work at any size because they follow a clear visual hierarchy: 1. **One clear subject**: Don't crowd the frame. 2. **High contrast**: Ensure visibility against any background. 3. **Readable text**: Use large, bold text (3-5 words maximum). 4. **Emotional expressions**: Faces with clear emotions attract attention. ## Animated Previews Many platforms show a short animated preview on hover. To make effective previews: - Choose the most engaging 3-5 seconds of content. - Avoid starting with a static title card. - Include action or visual interest immediately. ## Technical Specifications | Platform | Thumbnail Size | Aspect Ratio | Max File Size | |----------|---------------|-------------|---------------| | YouTube | 1280x720 | 16:9 | 2 MB | | Vimeo | 1920x1080 | 16:9 | 10 MB | | Twitter/X | 1280x720 | 16:9 | 5 MB | | TikTok | 1080x1920 | 9:16 | 10 MB | ## A/B Testing Test different thumbnail designs for important videos. Small changes in color, text, or facial expression can produce measurable differences in click-through rates. ### Troubleshooting Video Encoding Errors Video encoding failures, quality issues, and compatibility problems can be frustrating to debug. This guide covers the most common encoding issues and their solutions for web video delivery. - URL: https://peasyvideo.com/guides/troubleshooting-video-encoding/ - Category: Troubleshooting - Reading time: 1 min - Words: 235 Key takeaways: - Video encoding involves complex interactions between codecs, containers, color spaces, and metadata. - Symptom: Solid green, purple, or corrupted frames appear in the output. - Symptom: Audio gradually falls out of sync with video over time. - Symptom: Output file is much larger than expected for the resolution. - Symptom: Video plays but shows a black screen while audio works. ## Common Encoding Problems Video encoding involves complex interactions between codecs, containers, color spaces, and metadata. Problems usually manifest as visual artifacts, playback failures, or unexpected file sizes. ## Green or Purple Frames **Symptom:** Solid green, purple, or corrupted frames appear in the output. **Cause:** Usually a hardware acceleration issue. GPU encoding can produce corrupted frames when the driver is outdated or when the source format is not fully supported by the GPU encoder. **Fix:** Disable hardware acceleration and use software encoding. Update GPU drivers. Try a different encoder preset. ## Audio/Video Sync Drift **Symptom:** Audio gradually falls out of sync with video over time. **Cause:** Mismatched sample rates or variable frame rate (VFR) source files. Screen recordings and phone videos often use VFR. **Fix:** Convert to constant frame rate (CFR) before processing. Set audio sample rate to 48 kHz for video work. ## Unexpectedly Large File Size **Symptom:** Output file is much larger than expected for the resolution. **Possible causes:** - CRF/quality value set too high (too much quality). - Using a slow preset that enables more thorough compression. - Source already has artifacts that are expensive to encode. - Audio bitrate disproportionately high. ## Blank or Black Video **Symptom:** Video plays but shows a black screen while audio works. **Cause:** Color space or pixel format incompatibility. Common when converting between HDR and SDR content. **Fix:** Explicitly set output color space and pixel format. ### Container Formats Explained: MP4, MKV, WebM, and MOV Container formats wrap video, audio, and metadata into a single file. Understanding the difference between MP4, MKV, WebM, and MOV helps you choose the right wrapper for your video content. - URL: https://peasyvideo.com/guides/video-container-formats-explained/ - Category: Comparison - Reading time: 1 min - Words: 243 Key takeaways: - A common source of confusion is the difference between codecs and containers. - MP4 is the most widely supported container format. - Matroska (MKV) supports virtually every codec and feature: multiple audio tracks, subtitle tracks, chapters, attachments, and metadata. - WebM is Google's container for VP8, VP9, and AV1 codecs. - QuickTime MOV is Apple's container format. ## Codec vs Container A common source of confusion is the difference between codecs and containers. The codec determines how video is compressed; the container determines how the compressed data is packaged. Think of it like a shipping box (container) holding various items (codec streams, subtitles, metadata). The same item can go in different boxes. ## MP4 (.mp4): Universal Container MP4 is the most widely supported container format. It supports H.264, H.265, AAC, and many other codecs. It's the default for web video, social media, and mobile devices. **Supports:** H.264, H.265, AAC, subtitles (limited). ## MKV (.mkv): The Kitchen Sink Matroska (MKV) supports virtually every codec and feature: multiple audio tracks, subtitle tracks, chapters, attachments, and metadata. It's popular for media libraries. **Supports:** Everything — H.264, H.265, AV1, VP9, FLAC, DTS, chapters. ## WebM (.webm): Web-Optimized WebM is Google's container for VP8, VP9, and AV1 codecs. It's designed for web delivery and is supported natively in all modern browsers. **Supports:** VP8, VP9, AV1, Vorbis, Opus. ## MOV (.mov): Apple's Container QuickTime MOV is Apple's container format. It's functionally similar to MP4 but has better support for ProRes and Apple-specific codecs. **Supports:** H.264, H.265, ProRes, AAC, PCM. ## Choosing the Right Container | Use Case | Recommended Container | |----------|----------------------| | Web delivery | MP4 or WebM | | Media archive | MKV | | Apple ecosystem | MOV | | Social media upload | MP4 | | Professional editing | MOV (ProRes) | ### How to Extract Audio From Video Files Extracting audio tracks from video files is useful for creating podcasts from interviews, music from concerts, and audio-only versions of content. - URL: https://peasyvideo.com/guides/how-to-extract-audio-from-video/ - Category: How-To - Reading time: 1 min - Words: 175 Key takeaways: - Video files contain separate audio and video streams. - When possible, extract without re-encoding. - Sometimes you need the audio in a different format. - Some videos contain multiple audio tracks — different languages, commentary tracks, or music/effects separation. - When converting a series of video lectures or conference talks, batch extraction processes all files with the same settings. ## Why Extract Audio? Video files contain separate audio and video streams. Extracting the audio stream without re-encoding preserves original quality and produces a standalone audio file that's much smaller than the video. ## Lossless Extraction When possible, extract without re-encoding. If the video contains AAC audio, extract it as an .m4a file. If it contains MP3, extract as .mp3. This preserves the original audio quality with zero quality loss. ## Transcoding During Extraction Sometimes you need the audio in a different format. Converting from the video's internal format (e.g., AAC) to MP3 involves one generation of lossy encoding. Use the highest practical bitrate (320 kbps for MP3) to minimize loss. ## Multi-Track Videos Some videos contain multiple audio tracks — different languages, commentary tracks, or music/effects separation. Extract the specific track you need by selecting it by index or language tag. ## Batch Processing When converting a series of video lectures or conference talks, batch extraction processes all files with the same settings. Name output files to match their source videos for easy identification. ### How to Trim and Cut Video Clips in the Browser Browser-based video trimming removes unwanted sections without installing software. Learn how to make precise cuts while preserving quality. - URL: https://peasyvideo.com/guides/how-to-trim-cut-video-browser/ - Category: How-To - Reading time: 1 min - Words: 161 Key takeaways: - Trimming removes content from the beginning or end of a clip. - Video is encoded in groups of frames (GOPs) starting with keyframes. - Modern browsers can process video using WebAssembly and WebCodecs APIs. - Video files are large — a 1-minute 1080p clip is 100-200 MB. - Video metadata (creation date, camera model, GPS) should transfer to the trimmed output. ## Trimming vs Cutting Trimming removes content from the beginning or end of a clip. Cutting removes a section from the middle, joining the remaining parts. Both operations are non-destructive when done without re-encoding. ## Keyframe Precision Video is encoded in groups of frames (GOPs) starting with keyframes. Cutting at non-keyframe positions requires re-encoding nearby frames, which takes longer and slightly reduces quality. Cutting at keyframes is instant. ## Browser-Based Processing Modern browsers can process video using WebAssembly and WebCodecs APIs. This enables trimming and basic editing entirely client-side, without uploading videos to servers. ## File Size Considerations Video files are large — a 1-minute 1080p clip is 100-200 MB. Browser-based processing loads the entire file into memory, so trimming files larger than 1 GB may exceed available browser memory. ## Preserving Metadata Video metadata (creation date, camera model, GPS) should transfer to the trimmed output. Verify that timestamps in the output reflect the trimmed portion, not the original file's timestamps. ### Instagram vs TikTok vs YouTube Shorts: Short-Form Video Compared Short-form video dominates social media. Compare Reels, TikTok, and Shorts for reach, monetization, and audience demographics. - URL: https://peasyvideo.com/guides/instagram-vs-tiktok-vs-youtube-shorts/ - Category: Comparison - Reading time: 1 min - Words: 200 Key takeaways: - TikTok's For You Page algorithm is the best for reaching non-followers. - Reels benefit from Instagram's existing social graph. - Shorts feed into YouTube's recommendation system and can drive subscribers to your long-form channel. - Create content for TikTok first (most flexible), then repurpose for Reels and Shorts. ## TikTok: The Discovery Engine TikTok's For You Page algorithm is the best for reaching non-followers. A new account with zero followers can go viral. Content with strong hooks in the first 1-2 seconds performs best. Maximum 10 minutes. ## Instagram Reels: The Engagement Hub Reels benefit from Instagram's existing social graph. Content spreads through followers' feeds and the Explore page. Reels perform best when they encourage saves and shares. Maximum 90 seconds. ## YouTube Shorts: The Subscriber Builder Shorts feed into YouTube's recommendation system and can drive subscribers to your long-form channel. YouTube monetizes Shorts through a revenue-sharing pool. Maximum 60 seconds. ## Comparison | Feature | TikTok | Reels | Shorts | |---------|--------|-------|--------| | Max length | 10 min | 90 sec | 60 sec | | Discovery | Best | Good | Good | | Monetization | Creator Fund | Bonuses | Ad revenue share | | Cross-posting | Limited | From TikTok | From TikTok | | Audience | Gen Z, Millennials | Broad | Broad | ## Cross-Posting Strategy Create content for TikTok first (most flexible), then repurpose for Reels and Shorts. Remove TikTok watermarks before posting elsewhere, as platforms deprioritize watermarked content from competitors. ### H.264 vs H.265 vs AV1: Video Codec Comparison Video codecs determine compression efficiency, quality, and compatibility. Compare the three dominant codecs for streaming and distribution. - URL: https://peasyvideo.com/guides/h264-vs-h265-vs-av1-comparison/ - Category: Comparison - Reading time: 1 min - Words: 205 Key takeaways: - H.264 is supported on virtually every device made in the last decade. - H.265 achieves 30-50% better compression than H.264 at equivalent quality. - AV1 matches or exceeds H.265 compression with no patent fees. - Use H.264 for maximum compatibility. ## H.264 (AVC): The Universal Standard H.264 is supported on virtually every device made in the last decade. Hardware encoding and decoding is available on all modern CPUs and GPUs. It's the safe choice when compatibility is the priority. ## H.265 (HEVC): Better Compression H.265 achieves 30-50% better compression than H.264 at equivalent quality. A 1 GB H.264 file becomes 500-700 MB in H.265. The trade-off is slower encoding and patent licensing costs that limit browser support. ## AV1: The Open Future AV1 matches or exceeds H.265 compression with no patent fees. It's backed by Google, Netflix, Amazon, and others. Hardware decoding is available on newer devices (2020+). Encoding is very slow but improving rapidly. ## Comparison | Feature | H.264 | H.265 | AV1 | |---------|-------|-------|-----| | Browser support | Universal | Safari only | Chrome, Firefox | | Hardware decode | All devices | Most modern | 2020+ devices | | Compression | Baseline | +30-50% | +35-55% | | Encoding speed | Fast | Medium | Slow | | License | Licensed | Licensed | Royalty-free | ## Recommendation Use H.264 for maximum compatibility. Use H.265 for Apple devices and storage savings. Use AV1 for web streaming where you control the player. ### Video Compression for Social Media Platforms Each social media platform has different video requirements. Learn optimal encoding settings for YouTube, Instagram, TikTok, and Twitter. - URL: https://peasyvideo.com/guides/video-compression-social-media/ - Category: Best Practice - Reading time: 1 min - Words: 213 Key takeaways: - Platforms re-encode all uploads to their internal format. - For most platforms, H.264 in MP4 at the platform's maximum resolution with a bitrate of 8-12 Mbps for 1080p provides the best quality-to-upload-time ratio. - Use AAC audio at 128-256 kbps, stereo. - Platforms extract thumbnails from the video or let you upload custom ones. ## Platform Specifications | Platform | Resolution | Max Length | Max Size | Format | |----------|-----------|-----------|----------|--------| | YouTube | 4K (3840×2160) | 12 hours | 256 GB | MP4 | | Instagram Feed | 1080×1080 | 60 min | 250 MB | MP4 | | Instagram Reels | 1080×1920 | 90 sec | 250 MB | MP4 | | TikTok | 1080×1920 | 10 min | 287 MB | MP4 | | Twitter/X | 1920×1200 | 2:20 min | 512 MB | MP4 | ## Pre-Upload Compression Platforms re-encode all uploads to their internal format. Starting with a high-quality upload produces better results after re-encoding. However, uploading massive files wastes bandwidth without improving the final quality. ## Optimal Upload Settings For most platforms, H.264 in MP4 at the platform's maximum resolution with a bitrate of 8-12 Mbps for 1080p provides the best quality-to-upload-time ratio. Higher bitrates don't improve quality after the platform re-encodes. ## Audio Encoding Use AAC audio at 128-256 kbps, stereo. Most platforms normalize audio to their standard loudness level, so extremely loud or quiet audio will be adjusted. ## Thumbnail Optimization Platforms extract thumbnails from the video or let you upload custom ones. Custom thumbnails at 1280×720 (YouTube) or the platform's recommended size perform significantly better than auto-generated alternatives. ### Troubleshooting Audio Sync Issues in Video Audio-video synchronization problems make content unwatchable. Learn how to diagnose and fix audio drift, delay, and sync offset issues. - URL: https://peasyvideo.com/guides/troubleshooting-audio-sync-video/ - Category: Troubleshooting - Reading time: 1 min - Words: 197 Key takeaways: - Watch for visual cues: lip movements that don't match speech, sound effects that lag behind their visual triggers, or echo-like effects where audio from a previous scene overlaps the current one. - Audio is consistently early or late by the same amount throughout. - Audio starts in sync but gradually falls out of sync, getting worse over time. - Variable frame rate (VFR) video from phones and screen recorders. ## Detecting Sync Issues Watch for visual cues: lip movements that don't match speech, sound effects that lag behind their visual triggers, or echo-like effects where audio from a previous scene overlaps the current one. ## Constant Offset ### Symptoms Audio is consistently early or late by the same amount throughout. ### Cause Different recording start times for audio and video, or a fixed delay introduced during capture or encoding. ### Solution Shift the entire audio track forward or backward by the offset amount. Use a clap or visual cue to measure the exact offset. ## Progressive Drift ### Symptoms Audio starts in sync but gradually falls out of sync, getting worse over time. ### Cause Different sample rates between audio and video (e.g., audio at 48000 Hz paired with video at 48048 Hz), or dropped frames. ### Solution Resample the audio to match the video's expected sample rate. For dropped frames, re-encode the video at a constant frame rate. ## After-Export Sync Loss ### Cause Variable frame rate (VFR) video from phones and screen recorders. Many editors struggle with VFR, creating sync issues on export. ### Solution Convert VFR to constant frame rate (CFR) before editing. ### Troubleshooting Video Playback Problems Videos that won't play, stutter, or show artifacts are frustrating. Learn how to diagnose and fix common video playback issues. - URL: https://peasyvideo.com/guides/troubleshooting-video-playback-problems/ - Category: Troubleshooting - Reading time: 1 min - Words: 168 Key takeaways: - Video player shows a black screen, error message, or loading spinner indefinitely. - Video pauses frequently, drops frames, or shows buffering indicators. - Parts of the video show green, pink, or corrupted rectangular blocks. ## Video Won't Play At All ### Symptoms Video player shows a black screen, error message, or loading spinner indefinitely. ### Common Causes - Unsupported codec (HEVC in Firefox, VP9 in Safari) - Corrupted file header - DRM-protected content without proper license ### Solutions Try a different player or browser. Convert to H.264/MP4 for universal compatibility. Use a video inspection tool to check for file corruption. ## Stuttering and Buffering ### Symptoms Video pauses frequently, drops frames, or shows buffering indicators. ### Causes Insufficient bandwidth for the video bitrate, or the device lacks hardware decoding support for the codec. ### Solutions Reduce video resolution or bitrate. Use a codec with hardware decode support. For streaming, implement adaptive bitrate (ABR) that adjusts quality automatically. ## Green or Pink Artifacts ### Symptoms Parts of the video show green, pink, or corrupted rectangular blocks. ### Causes GPU hardware decode failure or corrupted video data. ### Solutions Disable hardware acceleration in browser settings. Re-encode the video with a different encoder or settings. ### How to Optimize Video for Web Embedding Compress and format videos for fast web loading with adaptive bitrate streaming and proper encoding settings. - URL: https://peasyvideo.com/guides/how-to-optimize-video-web-embedding/ - Category: How-To - Reading time: 2 min - Words: 310 Key takeaways: - Video is typically the heaviest content on any web page. - Cellular connections have highly variable bandwidth — adaptive streaming is essential. - ### Poster Images Always provide a poster attribute with an optimized image — this shows before the video loads and while it buffers. ## Optimizing Video for Web Video is typically the heaviest content on any web page. Optimization reduces buffering, saves bandwidth, and improves Core Web Vitals scores without visibly degrading quality. ### Encoding Settings for Web Use H.264 for maximum compatibility or H.265/AV1 for smaller files on supported browsers. Target bitrate depends on resolution: 720p at 2-4 Mbps, 1080p at 4-8 Mbps, 4K at 15-25 Mbps. Use two-pass encoding for the best quality-to-size ratio. Set the GOP (Group of Pictures) size to 2× the frame rate for a good balance of seek precision and compression. ### Adaptive Bitrate Streaming Instead of serving a single video file, create multiple quality levels and let the player adapt based on the viewer's bandwidth. HLS (HTTP Live Streaming) is the dominant format, supported by all major browsers. Create renditions at 360p, 480p, 720p, and 1080p. The player starts with a low quality, then upgrades as bandwidth measurements stabilize. ### Preloading Strategy `preload="none"` saves bandwidth when the video may not be played (below the fold, in a carousel). `preload="metadata"` loads enough to show the duration, dimensions, and first frame. `preload="auto"` (the default) aggressively buffers — use this only for hero videos that will definitely be played. ### Poster Images Always provide a poster attribute with an optimized image — this shows before the video loads and while it buffers. Use WebP format at the video's display dimensions. Include the play button overlay in the poster to signal that the element is interactive. Without a poster, users see a black rectangle until enough video data loads. ### Mobile Considerations Mobile browsers restrict autoplay to muted videos. Cellular connections have highly variable bandwidth — adaptive streaming is essential. Many mobile users have data caps, so provide video duration and estimated data usage before playback starts. Consider providing an … ### Video Aspect Ratios and Resolution Guide Choose correct aspect ratios and resolutions for YouTube, TikTok, Instagram, and web embedding. - URL: https://peasyvideo.com/guides/video-aspect-ratios-resolution-guide/ - Category: Comparison - Reading time: 1 min - Words: 287 ## Video Aspect Ratios Different platforms expect different aspect ratios. Using the wrong ratio results in letterboxing (black bars), cropping, or distortion — all of which make content look unprofessional. ### Standard Aspect Ratios 16:9 (1920×1080) is the default for YouTube, web embedding, and most video platforms. 9:16 (1080×1920) is vertical video for TikTok, Instagram Reels, and YouTube Shorts. 1:1 (1080×1080) is the square format used on Instagram feed posts. 4:5 (1080×1350) is Instagram's portrait format, maximizing screen real estate in the feed. ### Resolution Tiers Standard Definition: 480p (854×480) — minimum for watchable video. HD: 720p (1280×720) — the practical minimum for modern content. Full HD: 1080p (1920×1080) — the standard for most web video. 2K/QHD: 1440p (2560×1440) — useful for detailed content (tutorials, gaming). 4K/UHD: 2160p (3840×2160) — for cinematic content and future-proofing. ### Platform-Specific Requirements YouTube recommends uploading at the highest resolution available — it handles transcoding to lower qualities. TikTok accepts up to 1080p; higher resolutions are downscaled. Instagram compresses video aggressively — upload at 1080p for the best result after compression. Twitter/X limits video to 512MB and 2:20 duration. ### Frame Rate Considerations 24fps for cinematic content, 30fps for standard video, 60fps for gaming, sports, and smooth motion. Higher frame rates mean larger files at the same resolution. Most platforms accept 24-60fps. Mixing frame rates in a project causes judder — pick one and stick with it. Slow motion requires high-frame-rate capture: 120fps plays back at 4× slow motion at 30fps. ### Pixel Aspect Ratio Modern digital video uses square pixels (PAR 1:1). Legacy formats (DV, DVD) use non-square pixels, which causes stretching if played back without correction. When converting legacy footage, ensure your tool applies the correct pixel aspect ratio correction. ### Video Encoding Settings for Maximum Quality at Minimum File Size Encoding settings dramatically affect video quality and file size. Learn how bitrate, CRF, preset, and keyframe interval interact to produce optimal results. - URL: https://peasyvideo.com/guides/video-encoding-settings-quality-filesize/ - Category: Best Practice - Reading time: 2 min - Words: 311 Key takeaways: - Video encoding balances three factors: quality, file size, and encoding speed. - ### CRF (Constant Rate Factor) CRF is the most important quality setting. - This is essential for meeting target file sizes or bitrate caps. ## Key Encoding Parameters Video encoding balances three factors: quality, file size, and encoding speed. Understanding how each parameter affects these factors lets you make informed tradeoffs for your specific use case. ### CRF (Constant Rate Factor) CRF is the most important quality setting. It targets a constant perceptual quality level, adjusting bitrate dynamically — allocating more bits to complex scenes and fewer to static ones. For H.264, CRF 18 is visually lossless, 23 is the default, and 28 produces noticeable artifacts. For H.265/HEVC, subtract 4-6 from these values (CRF 17-19 is equivalent quality). ### Preset Speed Tradeoff Encoding presets (ultrafast to veryslow) control how hard the encoder works to compress efficiently. Slower presets produce smaller files at the same quality but take longer. "medium" is the default; "slow" offers meaningfully better compression with roughly 2x encoding time; "veryslow" gives diminishing returns. For batch processing, "slow" is usually the sweet spot. ### Keyframe Interval Keyframes (I-frames) are complete frames; between them, only differences are encoded. Shorter intervals (every 1-2 seconds) enable faster seeking but increase file size. Longer intervals (4-10 seconds) produce smaller files but make seeking slower. For streaming, use a keyframe interval matching your segment duration (typically 2 seconds). ### Audio Settings Audio is often overlooked but affects total file size. AAC at 128-192 kbps is sufficient for most video content. For music-heavy content, use 256 kbps. Opus codec provides better quality at lower bitrates if your target platforms support it. For stereo content, downmixing from surround saves significant space. ### Two-Pass Encoding Two-pass encoding analyzes the entire video first, then encodes with optimal bitrate allocation. This is essential for meeting target file sizes or bitrate caps. The first pass is fast (analysis only); the second pass does the actual encoding. Use two-pass when you need to fit … ### How to Add Subtitles and Captions to Video Subtitles and captions make video accessible to deaf and hard-of-hearing viewers and improve engagement for all viewers. Learn the different formats and embedding methods. - URL: https://peasyvideo.com/guides/how-to-add-subtitles-captions-video/ - Category: How-To - Reading time: 1 min - Words: 255 Key takeaways: - Subtitles translate spoken dialogue for viewers who speak a different language. - ### Creating Accurate Captions Timing is critical — captions should appear when the speaker begins talking and disappear shortly after they stop. - YouTube auto-generates captions but accuracy varies — always review and correct auto-generated captions. ## Subtitles vs Captions Subtitles translate spoken dialogue for viewers who speak a different language. Captions transcribe all audio content — dialogue, sound effects, music descriptions — for viewers who cannot hear. Closed captions can be toggled on/off; open captions (burned in) are permanently visible. ### Caption File Formats SRT (SubRip Text) is the most widely supported format — simple timestamp and text pairs. WebVTT adds styling, positioning, and cue settings, making it ideal for web video. ASS/SSA supports complex formatting and animation, common in anime fansubs. TTML (Timed Text Markup Language) is the broadcast standard used by Netflix and other streaming services. ### Creating Accurate Captions Timing is critical — captions should appear when the speaker begins talking and disappear shortly after they stop. A maximum of two lines with 42 characters per line is the standard. Keep each caption on screen for at least 1 second and no more than 7 seconds. Avoid splitting sentences in the middle of a phrase. ### Embedding Methods Soft subtitles are separate tracks embedded in the video container (MKV, MP4) that viewers can toggle. Hard subtitles are burned into the video frames permanently. For web delivery, serve caption files separately and reference them in the video player using the HTML `<track>` element. ### Accessibility Standards WCAG 2.1 Level A requires captions for all pre-recorded video with audio. Level AA requires captions for live video. The FCC mandates closed captions for television content distributed online. YouTube auto-generates captions but accuracy varies — always review and correct auto-generated captions. ### Troubleshooting Video Export and Rendering Errors Fix common video export failures including codec errors, audio sync issues, and rendering crashes. - URL: https://peasyvideo.com/guides/troubleshooting-video-export-rendering-errors/ - Category: Troubleshooting - Reading time: 2 min - Words: 315 ## Troubleshooting Video Export Video export failures are frustrating because they often occur after a long rendering process. Understanding common failure modes helps you diagnose and fix issues without starting from scratch. ### Out of Memory Errors Video rendering is memory-intensive, especially at high resolutions with effects. 4K video with complex effects can consume 8GB+ of RAM. Solutions: close other applications during rendering, reduce preview quality (render quality can stay high), render in sections and concatenate afterward, or use proxy editing (edit with low-res proxies, render from full-res originals). ### Audio/Video Sync Issues Sync problems usually originate from variable frame rate (VFR) source footage. Most screen recorders and smartphones record in VFR, where the frame rate varies based on scene complexity. Convert VFR to constant frame rate (CFR) before editing. If sync drift is gradual (audio slowly gets ahead or behind), the frame rate of the timeline doesn't match the source. ### Codec Compatibility The export codec must be supported by your target platform. H.264 is the safest choice for universal compatibility. H.265 (HEVC) produces smaller files but isn't supported everywhere. ProRes is preferred for professional editing workflows but produces very large files. AV1 offers the best compression but encoding is extremely slow. ### Color Shift After Export If exported video looks different from the preview — washed out, oversaturated, or with a color cast — check the color space settings. Editing in Rec. 709 and exporting in Rec. 2020 (or vice versa) causes visible color shifts. Ensure the export color space matches the source and editing color space. ### Partial Render Failures If rendering fails at a specific timestamp, that section likely contains a problematic element: a corrupt source clip, an unsupported effect, or a transition that exceeds available memory. Navigate to the failure point, simplify or remove the … ### Video Format Containers vs Codecs: What's the Difference? MP4, MKV, and WebM are containers; H.264, H.265, and VP9 are codecs. Understanding this distinction is essential for video conversion and compatibility troubleshooting. - URL: https://peasyvideo.com/guides/video-containers-vs-codecs-explained/ - Category: Comparison - Reading time: 1 min - Words: 284 ## Containers vs Codecs A video container (format) is like a box that holds different types of content — video, audio, subtitles, metadata, and chapter markers. A codec (compressor-decompressor) is the algorithm that encodes and decodes the actual video or audio data inside the container. ### Common Containers MP4 (.mp4) is the most universally supported container, compatible with virtually every device and browser. It typically holds H.264 or H.265 video with AAC audio. MKV (.mkv) is a flexible open-source container that supports nearly any codec and can hold multiple audio/subtitle tracks. WebM (.webm) is Google's open-source container designed for web use, typically holding VP9 video and Opus audio. ### Common Video Codecs H.264 (AVC) is the most widely supported codec — every device and browser plays it. H.265 (HEVC) provides 40-50% better compression than H.264 but has licensing complexities and limited browser support. AV1 is royalty-free, offers excellent compression (comparable to H.265), and is supported by modern browsers. VP9 is Google's royalty-free codec, widely used on YouTube. ### Why This Distinction Matters When a video "won't play," the issue is almost always the codec, not the container. A browser may support MP4 containers but not the H.265 codec inside it. Renaming a file from .mkv to .mp4 doesn't change the codecs — it usually creates a broken file. Proper conversion requires re-encoding with a compatible codec. ### Choosing the Right Combination For maximum compatibility: MP4 with H.264 + AAC. For best quality per byte on modern devices: MP4 with H.265 + AAC or WebM with AV1 + Opus. For web delivery: MP4 with H.264 as fallback, WebM with VP9 or AV1 as primary (progressive enhancement). For archival: MKV with the original codec (no re-encoding). ### Troubleshooting Video Buffering and Slow Loading Video buffering frustrates viewers and increases bounce rates. Diagnose whether the issue is encoding, hosting, or delivery and apply the right fix. - URL: https://peasyvideo.com/guides/troubleshooting-video-buffering-slow-loading/ - Category: Troubleshooting - Reading time: 1 min - Words: 284 Key takeaways: - Video buffering has three main causes: the video file is too large for the viewer's bandwidth, the hosting server is too slow, or the delivery method doesn't support efficient streaming. - ### Progressive Download vs Streaming Progressive download sends the video as a single file — the viewer must wait for enough data to buffer before playback starts. - The `moov atom` (MP4 metadata) must be at the beginning of the file, not the end — use `qt-faststart` or the `-movflags +faststart` FFmpeg option. ## Identifying the Bottleneck Video buffering has three main causes: the video file is too large for the viewer's bandwidth, the hosting server is too slow, or the delivery method doesn't support efficient streaming. ### Encoding Issues If your video bitrate exceeds the viewer's bandwidth, buffering is inevitable. A 1080p video at 8 Mbps requires a fast connection. Providing multiple quality levels (adaptive bitrate streaming) lets the player switch to a lower quality when bandwidth drops. As a rule of thumb, target bitrates should be 60-70% of your audience's median bandwidth. ### Progressive Download vs Streaming Progressive download sends the video as a single file — the viewer must wait for enough data to buffer before playback starts. HTTP streaming (HLS or DASH) splits the video into small segments (2-6 seconds each), allowing playback to begin almost immediately and the quality to adapt to bandwidth changes. ### Server Configuration Ensure your server supports byte-range requests (HTTP 206 Partial Content) so the video player can seek without re-downloading. The `moov atom` (MP4 metadata) must be at the beginning of the file, not the end — use `qt-faststart` or the `-movflags +faststart` FFmpeg option. Missing this is the most common cause of slow video start times. ### CDN and Caching Serve video from a CDN with edge locations close to your viewers. Configure cache headers for video files (Cache-Control: public, max-age=31536000 for immutable content). For live content, use a CDN that supports live streaming protocols. ### Client-Side Debugging Use browser DevTools Network tab to inspect video segment requests. Check for stalled requests, high TTFB (Time To First Byte), or incomplete downloads. The player's quality-of-experience metrics (buffering ratio, startup time, quality switches) indicate which aspect needs improvement. ### How to Convert Between Video Containers and Codecs Understand the relationship between video containers (MP4, MKV, WebM) and codecs (H.264, H.265, VP9) for proper conversion. - URL: https://peasyvideo.com/guides/how-to-convert-video-containers-codecs/ - Category: How-To - Reading time: 2 min - Words: 319 Key takeaways: - Video conversion requires understanding two distinct concepts: the container (file format) and the codec (compression algorithm). - Minimize re-encoding passes — never convert from one lossy codec to another lossy codec unless absolutely necessary. - Always start from the highest-quality source available. ## Video Containers and Codecs Video conversion requires understanding two distinct concepts: the container (file format) and the codec (compression algorithm). Confusing these leads to unnecessary re-encoding and quality loss. ### Containers vs Codecs A container (MP4, MKV, WebM, MOV, AVI) is a wrapper that holds video, audio, subtitles, and metadata streams. A codec (H.264, H.265, VP9, AV1) is the algorithm that compresses video data. MP4 can contain H.264 or H.265 video with AAC or AC-3 audio. MKV is the most flexible, supporting virtually any codec combination. ### When Re-Encoding Is Unnecessary Changing container without changing codecs (remuxing) is instant and lossless. Converting MKV (H.264 + AAC) to MP4 (H.264 + AAC) simply repackages the same streams in a different wrapper. No quality loss occurs because the compressed video data is copied byte-for-byte. This takes seconds regardless of file size. ### When Re-Encoding Is Required Changing codecs requires re-encoding: converting H.264 to H.265 reduces file size but involves decoding and re-encoding every frame. Each generation of re-encoding introduces quality loss. Minimize re-encoding passes — never convert from one lossy codec to another lossy codec unless absolutely necessary. Going from H.264 to H.265 for storage savings is reasonable; going from H.264 to H.264 with different settings is wasteful. ### Codec Compatibility H.264 in MP4: universal compatibility — every device, browser, and player supports this combination. H.265 in MP4: newer devices support it; some browsers don't. VP9 in WebM: supported by Chrome, Firefox, Edge; not Safari (but Safari supports VP9 in MP4). AV1 in WebM or MP4: best compression but slowest encoding; growing browser support. ### Practical Conversion Guide For maximum compatibility: H.264 + AAC in MP4. For smaller files: H.265 + AAC in MP4 (with H.264 fallback). For web-only: VP9 + Opus in WebM. For archival: original codec in MKV (don't … ### Video Aspect Ratios: Choosing the Right Format Select the optimal aspect ratio for different platforms and viewing contexts. - URL: https://peasyvideo.com/guides/video-aspect-ratios-choosing-right-format/ - Category: How-To - Reading time: 1 min - Words: 287 Key takeaways: - Aspect ratio describes the proportional relationship between width and height. - 16:9 (1920×1080, 3840×2160) is the universal standard for television, YouTube, and desktop web video. - 9:16 (1080×1920) dominates mobile-first platforms: TikTok, Instagram Reels, YouTube Shorts, and Snapchat. - Square video (1080×1080) works well on Instagram feed posts and Facebook. - 21:9 (or 2.39:1) is the traditional cinema widescreen ratio. ## Understanding Aspect Ratios Aspect ratio describes the proportional relationship between width and height. The choice of aspect ratio affects viewer experience, platform compatibility, and creative framing. Shooting in the wrong ratio means cropping later, which loses resolution and compositional control. ## 16:9 — The Standard 16:9 (1920×1080, 3840×2160) is the universal standard for television, YouTube, and desktop web video. It matches modern monitor proportions and provides a balanced widescreen view. For content primarily consumed on computers and TVs, 16:9 is the safe default. ## 9:16 — Vertical Video 9:16 (1080×1920) dominates mobile-first platforms: TikTok, Instagram Reels, YouTube Shorts, and Snapchat. Vertical video fills the phone screen completely, maximizing visual impact. For social media content targeting mobile users, 9:16 is essential. It also works well for stories and ephemeral content. ## 1:1 — Square Format Square video (1080×1080) works well on Instagram feed posts and Facebook. It takes up more screen space than 16:9 on mobile feeds. Square is also effective for product demonstrations, tutorial snippets, and content that needs to work across multiple platforms without reframing. ## 21:9 — Cinematic Ultrawide 21:9 (or 2.39:1) is the traditional cinema widescreen ratio. It creates a dramatic, immersive feel and works well for narrative content, travel videos, and visual storytelling. However, it displays with letterbox bars on standard screens, reducing the effective viewing area on mobile devices. ## Multi-Platform Strategy If creating for multiple platforms, shoot in 16:9 at the highest resolution available. Frame your subjects with extra headroom and side space so the video can be cropped to 9:16 and 1:1 in post-production. Some creators shoot in 4:5 as a compromise that crops well to both 9:16 and 16:9. Always plan your framing for the primary platform first. ### Video Accessibility: Audio Descriptions and Transcripts Making video content accessible requires more than captions. Learn about audio descriptions for blind viewers, transcripts, and accessible player controls. - URL: https://peasyvideo.com/guides/video-accessibility-audio-descriptions/ - Category: Best Practice - Reading time: 1 min - Words: 233 Key takeaways: - Captions serve deaf and hard-of-hearing viewers, but blind and low-vision viewers also need accommodations. - ### Audio Descriptions Audio descriptions are narrations inserted during natural pauses in dialogue, describing important visual elements: on-screen text, facial expressions, scene changes, and actions. - ### Accessible Video Players The video player itself must be keyboard-navigable with visible focus indicators. - Screen readers must be able to announce the current playback state and available controls. ## Beyond Captions Captions serve deaf and hard-of-hearing viewers, but blind and low-vision viewers also need accommodations. Audio descriptions narrate visual information that isn't conveyed through dialogue. Transcripts provide a text alternative that works for both groups and is searchable by machines. ### Audio Descriptions Audio descriptions are narrations inserted during natural pauses in dialogue, describing important visual elements: on-screen text, facial expressions, scene changes, and actions. For example: "Sarah glances at the document on her desk, then looks out the window at the approaching storm." Extended audio descriptions pause the video to allow longer narrations when natural pauses are insufficient. ### Transcripts A complete transcript includes dialogue, speaker identification, sound effects, music descriptions, and descriptions of significant visual content. Transcripts serve multiple purposes: accessibility, SEO (search engines can index the text), content repurposing (blog posts, social media), and translation. ### Accessible Video Players The video player itself must be keyboard-navigable with visible focus indicators. Play/pause, volume, progress bar, caption toggle, and fullscreen controls must all be operable without a mouse. Screen readers must be able to announce the current playback state and available controls. ### WCAG Requirements Level A requires captions for pre-recorded video and a text alternative (transcript or audio description). Level AA requires captions for live video and audio descriptions for pre-recorded video. Level AAA requires sign language interpretation and extended audio descriptions. At minimum, aim for Level AA compliance. ### Video Encoding Settings for Web Delivery Optimize video encoding with the right codec, bitrate, and container settings for web playback. - URL: https://peasyvideo.com/guides/video-encoding-settings-web-delivery/ - Category: Best Practice - Reading time: 1 min - Words: 280 Key takeaways: - H.264 (AVC) remains the most compatible codec — supported by virtually every browser and device. - For 1080p H.264 web video, target 5-8 Mbps for high quality and 3-5 Mbps for good quality. - MP4 (with H.264 or H.265) is the universal web container. - AAC is the standard audio codec for MP4 containers. - Export from your editing software at the highest quality (ProRes, DNxHR, or high-bitrate H.264). ## Codec Selection H.264 (AVC) remains the most compatible codec — supported by virtually every browser and device. H.265 (HEVC) offers 50% better compression but has limited browser support and licensing complexity. VP9 (Google's open codec) is well-supported in Chrome and Firefox. AV1 is the newest option with the best compression but requires significant encoding time. ## Bitrate Guidelines For 1080p H.264 web video, target 5-8 Mbps for high quality and 3-5 Mbps for good quality. For 4K, double these values. For screen recordings and tutorials (low motion), you can use 30-50% lower bitrates. For high-motion content (sports, action), use the higher end of the range. Variable bitrate (VBR) encoding allocates bits where needed, producing better quality than constant bitrate (CBR) at the same average rate. ## Container Format MP4 (with H.264 or H.265) is the universal web container. WebM (with VP9 or AV1) is preferred for Chrome-first applications. For adaptive streaming, use fragmented MP4 with DASH or HLS. For simple file downloads and social media uploads, plain MP4 with H.264 baseline profile ensures maximum compatibility. ## Audio in Video Files AAC is the standard audio codec for MP4 containers. For stereo voice content, 128-192 kbps is sufficient. For music or sound-design-heavy content, use 256-320 kbps. Sample rate should match your source (typically 48 kHz for video). Normalize audio loudness to -14 LUFS for web platforms. ## Encoding Workflow Export from your editing software at the highest quality (ProRes, DNxHR, or high-bitrate H.264). Then compress for delivery using FFmpeg or HandBrake. Two-pass encoding produces better quality at the target bitrate than single-pass. Always test the encoded file on multiple devices before publishing. Consider creating multiple quality versions for adaptive streaming. ### Fixing Video Playback Issues in Browsers Troubleshoot common HTML5 video playback problems including codec errors, autoplay blocks, and CORS. - URL: https://peasyvideo.com/guides/fixing-video-playback-issues-browsers/ - Category: Troubleshooting - Reading time: 1 min - Words: 271 Key takeaways: - HTML5 video playback can fail for numerous reasons: unsupported codecs, CORS restrictions, autoplay policies, missing server configuration, or memory limitations. - The most common failure is a codec mismatch. - Modern browsers block autoplay with audio to prevent annoying user experiences. - Videos served from a different domain require proper CORS headers. - Large video files can cause memory issues on mobile devices. ## Common Playback Failures HTML5 video playback can fail for numerous reasons: unsupported codecs, CORS restrictions, autoplay policies, missing server configuration, or memory limitations. Systematic diagnosis starts with the browser console — video errors appear there before any visual indication. ## Codec Compatibility Issues The most common failure is a codec mismatch. Safari requires H.264 in MP4 containers. Firefox and Chrome support VP9/WebM in addition to H.264. Some H.264 profiles (High 4:4:4) aren't supported in hardware decoders. Use the HTML5 source element to provide multiple formats. As a universal fallback, H.264 Baseline or Main profile in MP4 works everywhere. ## Autoplay Restrictions Modern browsers block autoplay with audio to prevent annoying user experiences. Chrome, Firefox, and Safari all require user interaction before playing audio. Solutions: use the muted attribute for autoplay (always works), add playsinline for iOS Safari, or trigger playback in response to a user click event. The play() Promise rejection is the most common JavaScript error for video. ## CORS and Server Configuration Videos served from a different domain require proper CORS headers. The server must return Access-Control-Allow-Origin headers. Additionally, the server must support range requests (Accept-Ranges: bytes) for seeking to work properly. Missing Content-Type headers can cause browsers to refuse playback. Check that your server returns the correct MIME type (video/mp4, video/webm). ## Performance and Memory Large video files can cause memory issues on mobile devices. Implement adaptive bitrate streaming (HLS or DASH) for videos longer than a few minutes. Lazy-load videos that are below the fold. Use the preload attribute wisely — preload="none" prevents unnecessary bandwidth usage, preload="metadata" loads duration and dimensions without downloading the full file. ### How to Batch Process Multiple File Conversions Converting files one at a time is tedious and error-prone. Learn strategies for batch converting documents, images, audio, and video efficiently. - URL: https://peasyvideo.com/guides/how-to-batch-process-file-conversions/ - Category: How-To - Reading time: 1 min - Words: 286 ## The Batch Conversion Workflow Whether you're converting 50 images from HEIC to JPEG, 200 documents from DOCX to PDF, or an audio library from FLAC to MP3, the workflow is the same: organize inputs, configure conversion settings, process in batch, verify outputs, and handle failures. ### Organizing Input Files Start by collecting all source files in a single directory structure. Verify file types — not all files with the same extension are the same format (a .doc file might be Word 97 or Word 2003 format). Count files and note total size to estimate processing time and storage requirements. ### Consistent Settings Define your conversion settings once and apply them uniformly. For images: target format, quality level, maximum dimensions, color profile. For documents: output format, font embedding, image compression. For audio: codec, bitrate, sample rate, mono/stereo. Document these settings for reproducibility. ### Error Recovery Large batches will encounter failures — corrupted source files, unsupported features, and edge cases. Design your workflow to: log each file's processing result (success/failure/warning), continue processing after failures (don't stop on first error), and generate a summary report. Keep failed files in a separate output directory for manual review. ### Output Verification Spot-check converted files at regular intervals (every 10th file, for example). Compare file sizes — dramatically smaller or larger outputs may indicate conversion errors. For images, do visual spot checks. For documents, verify formatting preservation. For audio/video, check duration matches and listen/watch brief samples. ### Naming and Organization Maintain source file names in the output, changing only the extension. Create a parallel directory structure if the source is organized in folders. Include a conversion log file with each output batch documenting source files, settings used, and any issues encountered. ### How to Create Animated GIFs from Video Clips Animated GIFs remain one of the most shareable visual formats on the web. Learn how to extract the best moments from video clips and convert them into optimized, looping GIFs that load quickly and look great. - URL: https://peasyvideo.com/guides/how-to-create-animated-gifs-from-video/ - Category: How-To - Reading time: 2 min - Words: 446 Key takeaways: - Despite the rise of short-form video platforms, animated GIFs remain the universal format for inline animations. - Keep your GIF between 2 and 6 seconds. - Use a video trimming tool to isolate the exact segment you want. - Modern GIF encoders only store the pixels that changed between frames, not entire frames. - Aim for these file sizes based on use case: email embeds under 1MB, web page inline under 2MB, social media under 5MB, and documentation under 3MB. ## Why GIFs Still Matter Despite the rise of short-form video platforms, animated GIFs remain the universal format for inline animations. They work everywhere — email clients, chat apps, forums, and documentation — without requiring a video player. Their autoplay-and-loop behavior makes them ideal for tutorials, reaction images, and product demos. ## Choosing the Right Source Clip ### Duration Keep your GIF between 2 and 6 seconds. Longer GIFs balloon in file size because every frame is stored as a full or partial image. A 10-second GIF at 15fps contains 150 frames, which can easily exceed 10MB — far too large for most web pages. ### Resolution GIFs don't need to be full HD. A width of 480-640 pixels is sufficient for most use cases. Reducing resolution from 1920px to 480px cuts the pixel count by 94%, resulting in dramatically smaller file sizes. ### Content Selection GIFs work best with scenes that have limited motion and a small color palette. A talking head against a plain background compresses much better than a fast-paced action sequence with complex backgrounds. ## The Conversion Process ### Step 1: Trim the Clip Use a video trimming tool to isolate the exact segment you want. Precision matters — even one extra second adds 10-20 frames and increases file size significantly. ### Step 2: Set Frame Rate Standard video runs at 24-30fps, but GIFs look smooth at 10-15fps. Reducing the frame rate from 30fps to 12fps cuts the number of frames by 60% with minimal perceptual quality loss for most content. ### Step 3: Resize Scale down to your target width. For social media posts, 480px wide is standard. For documentation or tutorials, 640px provides more detail. ### Step 4: Optimize Colors GIFs are limited to 256 colors per frame. The conversion process uses color quantization … ### Video Container vs Codec: Understanding MP4, WebM, AVI, and MKV Demystify the relationship between video containers and codecs. Learn why changing a file extension does not convert video, and how to choose the right container-codec combination for your needs. - URL: https://peasyvideo.com/guides/video-container-vs-codec-mp4-webm-avi-mkv/ - Category: How-To - Reading time: 2 min - Words: 318 Key takeaways: - A container (MP4, WebM, MKV) is a wrapper that holds encoded video, audio, subtitles, and metadata. - For maximum browser compatibility, use MP4 with H.264 video and AAC audio. - Re-encoding video is computationally intensive. ## Containers and Codecs Are Different Things A container (MP4, WebM, MKV) is a wrapper that holds encoded video, audio, subtitles, and metadata. A codec (H.264, VP9, AV1) is the algorithm that compresses and decompresses the actual video data. Renaming a file from .avi to .mp4 does not re-encode the video — it just changes the wrapper, often producing a broken file. ## Container Comparison | Container | Common Codecs | Streaming | Subtitles | Patent Status | | --- | --- | --- | --- | --- | | MP4 (.mp4) | H.264, H.265, AAC | Yes | Limited | Patented codecs | | WebM (.webm) | VP8, VP9, AV1, Opus | Yes | WebVTT | Royalty-free | | MKV (.mkv) | Any codec | Limited | Extensive | Open format | | AVI (.avi) | Legacy codecs | No | Limited | Legacy | | MOV (.mov) | H.264, ProRes | Yes | Limited | Apple ecosystem | ## Codec Comparison | Codec | Compression | Speed | Quality | Browser Support | | --- | --- | --- | --- | --- | | H.264 | Good | Fast encode/decode | Good | Universal | | H.265 (HEVC) | 50% better than H.264 | Slow encode | Excellent | Safari, some others | | VP9 | Similar to H.265 | Medium | Excellent | Chrome, Firefox, Edge | | AV1 | 30% better than VP9 | Very slow encode | Best | Growing support | ## Choosing for the Web For maximum browser compatibility, use MP4 with H.264 video and AAC audio. For better compression, add a WebM (VP9/Opus) source and let browsers choose. AV1 offers the best quality per bit but encoding is computationally expensive. ## Conversion Tips Re-encoding video is computationally intensive. Use stream copying … ### Voice Recording Tips: Microphone Selection and Technique Voice recordings for podcasts, narration, and video rely on proper microphone selection, positioning, and room setup. Small adjustments in technique make a larger difference than expensive equipment upgrades. - URL: https://peasyvideo.com/guides/voice-recording-tips-microphone-technique/ - Category: Troubleshooting - Reading time: 2 min - Words: 328 Key takeaways: - Robust, noise-rejecting, and forgiving of imperfect rooms. - Distance:** 15-20 cm (6-8 inches) from the mouth - Set the microphone gain (on the interface or USB mic) so normal speaking voice peaks at -12 to -6 dBFS on the meter. - It is always better to record too quietly (fixable with post-production gain) than too loudly (clipping is permanent damage). ## Microphone Types for Voice ### Dynamic Microphones Robust, noise-rejecting, and forgiving of imperfect rooms. Dynamic mics like the Shure SM7B and Electro-Voice RE20 are broadcast standards because they focus on the sound source directly in front while rejecting room reflections and background noise. **Best for:** Untreated rooms, noisy environments, deep voices. ### Condenser Microphones More sensitive and detailed than dynamics. Large-diaphragm condensers (Audio-Technica AT2020, Rode NT1) capture subtle vocal nuances — breath, sibilance, room ambience. This sensitivity is a double-edged sword: they sound stunning in treated rooms and terrible in reflective rooms. **Best for:** Treated rooms, singing, detailed narration. ### USB Microphones All-in-one mic + audio interface for simplicity. The Blue Yeti, Samson Q2U, and Rode NT-USB Mini produce excellent voice recordings. The trade-off is less flexibility — fixed preamp gain, no external processing chain. **Best for:** Beginners, portable setups, video calls. ## Positioning Fundamentals - **Distance:** 15-20 cm (6-8 inches) from the mouth - **Angle:** Slightly off-axis (15-30 degrees) to reduce plosives - **Height:** Microphone capsule at mouth level or slightly above - **Pop filter:** 5 cm from the microphone, between mic and mouth ## Gain Staging Set the microphone gain (on the interface or USB mic) so normal speaking voice peaks at -12 to -6 dBFS on the meter. This provides headroom for loud moments (laughter, emphasis) without clipping. It is always better to record too quietly (fixable with post-production gain) than too loudly (clipping is permanent damage). ## Common Voice Recording Problems | Problem | Cause | Fix | |---------|-------|-----| | Plosive pops | Direct air blast on mic | Add pop filter, speak off-axis | | Sibilance (harsh 's') | Proximity, bright mic | Move back 5 cm, angle more off-axis | | Boomy bass | Proximity effect | Increase distance to 20-25 cm | … ### CSS aspect-ratio: Responsive Media Without Padding Hacks Replace the decades-old padding-bottom hack for maintaining aspect ratios with the native CSS aspect-ratio property. Covers responsive images, videos, and container sizing with clean modern CSS. - URL: https://peasyvideo.com/guides/css-aspect-ratio-responsive-media/ - Category: How-To - Reading time: 1 min - Words: 259 Key takeaways: - For years, maintaining aspect ratios required the padding-bottom percentage hack — setting `padding-bottom: 56.25%` on a container for a 16:9 ratio. - aspect-ratio: 1; /* Shorthand for 1 / 1 */ - Combine `aspect-ratio` with `object-fit` for responsive images that maintain their ratio without distortion: - Setting `aspect-ratio` on images and videos reserves space before the content loads, eliminating Cumulative Layout Shift (CLS). - The `aspect-ratio` property is supported in all modern browsers (Chrome 88+, Firefox 89+, Safari 15+). ## The Padding Hack Is Dead For years, maintaining aspect ratios required the padding-bottom percentage hack — setting `padding-bottom: 56.25%` on a container for a 16:9 ratio. This worked because vertical padding percentages are based on width, but the approach was confusing, fragile, and required inner wrapper elements. The native `aspect-ratio` property replaces it entirely. ## Modern Syntax ```css .video-container { aspect-ratio: 16 / 9; width: 100%; } .square-avatar { aspect-ratio: 1; /* Shorthand for 1 / 1 */ width: 4rem; } ``` ## Common Aspect Ratios | Ratio | Value | Use Case | | --- | --- | --- | | 16:9 | `16 / 9` | Video, hero images | | 4:3 | `4 / 3` | Classic photos, thumbnails | | 1:1 | `1` | Avatars, social media cards | | 3:2 | `3 / 2` | Photography, product images | | 21:9 | `21 / 9` | Cinematic banners | | 9:16 | `9 / 16` | Vertical video (Stories, Reels) | ## Responsive Images Combine `aspect-ratio` with `object-fit` for responsive images that maintain their ratio without distortion: ```css img { aspect-ratio: 16 / 9; width: 100%; object-fit: cover; } ``` ## Preventing Layout Shift Setting `aspect-ratio` on images and videos reserves space before the content loads, eliminating Cumulative Layout Shift (CLS). Combine with `width` and `height` HTML attributes for maximum layout stability. ## Browser Support The `aspect-ratio` property is supported in all modern browsers (Chrome 88+, Firefox 89+, Safari 15+). For the small percentage of older browsers, the padding-bottom fallback can coexist safely. ### Video Thumbnail Extraction: Techniques and Best Frames A compelling thumbnail determines whether viewers click your video. Extracting the right frame and optimizing it for different platforms requires both technical and creative considerations. - URL: https://peasyvideo.com/guides/video-thumbnail-extraction-techniques/ - Category: How-To - Reading time: 1 min - Words: 226 Key takeaways: - YouTube reports that 90% of top-performing videos use custom thumbnails. - Video files contain I-frames (keyframes) at regular intervals — typically every 2-4 seconds. - Faces:** Thumbnails with expressive faces get higher click rates - Export thumbnails as JPEG at 80-90% quality or WebP for smaller file sizes. ## Why Thumbnails Matter YouTube reports that 90% of top-performing videos use custom thumbnails. The thumbnail is your video's first impression in search results, feeds, and embeds. ## Extraction Methods ### Automatic Key Frame Detection Video files contain I-frames (keyframes) at regular intervals — typically every 2-4 seconds. Extracting these is fastest since they are complete frames that do not require reconstruction from delta frames. ### Scene Change Detection Algorithms detect significant visual changes between frames. This automatically finds transitional moments that often make good thumbnails — title cards, reveals, or dramatic composition changes. ### Manual Timestamp Extraction Specify exact timestamps to extract frames. This gives full control but requires watching the video to identify the best moments. ## Choosing the Best Frame - **Faces:** Thumbnails with expressive faces get higher click rates - **Contrast:** High-contrast images stand out in feeds - **Text:** Keep overlay text to 3-5 words maximum - **Composition:** Follow the rule of thirds - **Color:** Bright, saturated colors outperform muted tones ## Platform Specifications | Platform | Size | Aspect Ratio | |----------|------|-------------| | YouTube | 1280x720 | 16:9 | | Vimeo | 1280x720 | 16:9 | | TikTok | 1080x1920 | 9:16 | | Instagram Reels | 1080x1920 | 9:16 | | Twitter/X | 1200x675 | 16:9 | Export thumbnails as JPEG at 80-90% quality or WebP for smaller file sizes. ### Video Format Conversion Guide: MP4, WebM, MOV, and AVI Different platforms and devices require different video formats. Understanding container formats and their codec compatibility prevents quality loss during conversion. - URL: https://peasyvideo.com/guides/video-format-conversion-mp4-webm-mov/ - Category: How-To - Reading time: 1 min - Words: 238 Key takeaways: - A container (MP4, WebM, MOV) is the file format that holds video, audio, and metadata streams. - Google's open container for VP8/VP9/AV1 video and Vorbis/Opus audio. - Remuxing copies the video stream into a new container without re-encoding — it is instant and lossless. - ## Conversion Best Practices | From | To | Recommendation | |------|-----|---------------| | MOV (ProRes) | MP4 (H. ## Container vs Codec A container (MP4, WebM, MOV) is the file format that holds video, audio, and metadata streams. A codec (H.264, VP9) is the compression algorithm used on those streams. The same H.264 video can live inside an MP4, MOV, or MKV container. ## Common Containers ### MP4 (.mp4) The universal container. Supports H.264, H.265, and AAC audio. Plays on every device and browser. This is the default choice for web delivery. ### WebM (.webm) Google's open container for VP8/VP9/AV1 video and Vorbis/Opus audio. Smaller files than MP4 at equivalent quality but limited support outside browsers. ### MOV (.mov) Apple's QuickTime container. Supports ProRes for editing workflows. Common in professional video production but not ideal for web delivery. ### AVI (.avi) Microsoft's legacy container from 1992. No streaming support, limited codec options. Avoid for new projects. ## Conversion Best Practices | From | To | Recommendation | |------|-----|---------------| | MOV (ProRes) | MP4 (H.264) | Re-encode for web | | AVI | MP4 (H.264) | Always re-encode | | MP4 (H.264) | WebM (VP9) | Re-encode for smaller size | | MKV (H.264) | MP4 (H.264) | Remux only (no quality loss) | ## Remuxing vs Re-encoding Remuxing copies the video stream into a new container without re-encoding — it is instant and lossless. This works when the target container supports the source codec (e.g., H.264 from MKV to MP4). Re-encoding is required when changing codecs. ### Aspect Ratios for Video: Platform Guide and Cropping Strategy Each social platform and device favors different aspect ratios. Shooting and cropping strategically ensures your video fills the screen everywhere it appears. - URL: https://peasyvideo.com/guides/video-aspect-ratios-platform-guide/ - Category: Best Practice - Reading time: 1 min - Words: 236 Key takeaways: - Film in 16:9 at the highest resolution available, then crop for other ratios in post-production. - Cropping 16:9 to 9:16 removes 68% of the frame. - Letterboxing adds black bars to maintain the original ratio. - Always use square pixels (1:1 PAR). - Cropping is almost always preferred for social media. ## Common Aspect Ratios | Ratio | Pixels | Usage | |-------|--------|-------| | 16:9 | 1920x1080 | YouTube, TV, desktop web | | 9:16 | 1080x1920 | TikTok, Reels, Shorts | | 1:1 | 1080x1080 | Instagram feed, Facebook | | 4:5 | 1080x1350 | Instagram feed (max height) | | 4:3 | 1440x1080 | Legacy TV, presentations | | 21:9 | 2560x1080 | Cinematic, ultrawide | ## Shooting for Multiple Platforms Film in 16:9 at the highest resolution available, then crop for other ratios in post-production. Frame your subject in the center third of the frame — this is the 'safe zone' that remains visible in any crop. ## Cropping Strategy ### Vertical from Horizontal Cropping 16:9 to 9:16 removes 68% of the frame. Ensure key content (faces, text, action) stays centered. Auto-reframe tools in Premiere Pro and DaVinci Resolve use AI to track subjects. ### Square from Horizontal 1:1 crop from 16:9 removes the left and right edges. This works well when the subject is centered but fails for wide establishing shots. ## Letterboxing vs Cropping Letterboxing adds black bars to maintain the original ratio. While it preserves the full frame, it wastes screen space and looks unprofessional on mobile feeds. Cropping is almost always preferred for social media. ## Pixel Aspect Ratio Always use square pixels (1:1 PAR). Non-square pixels are a legacy artifact from analog TV and cause distortion in modern players. ### Video Bitrate Optimization for Streaming Delivery Choosing the right bitrate balances video quality with buffering risk. Adaptive bitrate streaming solves this by serving multiple quality levels based on viewer bandwidth. - URL: https://peasyvideo.com/guides/video-bitrate-optimization-streaming/ - Category: How-To - Reading time: 1 min - Words: 232 Key takeaways: - Bitrate is the number of bits processed per second of video. - Constant Bitrate (CBR): Same bitrate throughout. - Streaming services encode each video at multiple quality levels. - Netflix pioneered per-title encoding — analyzing each video's complexity to create a custom bitrate ladder. - Start with recommended bitrates and adjust based on content type ## What Bitrate Controls Bitrate is the number of bits processed per second of video. Higher bitrate means more data per frame, which generally means better quality — but also larger files and higher bandwidth requirements. ## Fixed vs Variable Bitrate **Constant Bitrate (CBR):** Same bitrate throughout. Predictable file size but wastes bits on simple scenes and starves complex ones. **Variable Bitrate (VBR):** Allocates bits based on scene complexity. Better quality-per-byte but unpredictable file sizes. **Constrained VBR:** VBR with a maximum bitrate cap. Best of both worlds for streaming — adapts to content while preventing bandwidth spikes. ## Bitrate Ladder Streaming services encode each video at multiple quality levels. A typical ladder: | Resolution | Bitrate | Target | |------------|---------|--------| | 360p | 600 kbps | 2G/slow mobile | | 480p | 1.5 Mbps | 3G/mobile | | 720p | 3 Mbps | WiFi/4G | | 1080p | 6 Mbps | Broadband | | 4K | 15 Mbps | Fast broadband | ## Per-Title Encoding Netflix pioneered per-title encoding — analyzing each video's complexity to create a custom bitrate ladder. An animated cartoon needs far fewer bits than a live-action scene with rain and confetti. ## Practical Tips - Start with recommended bitrates and adjust based on content type - Animated content can use 30-50% lower bitrates - Fast-motion sports need 20-30% higher bitrates - Always cap maximum bitrate for streaming delivery ### Creating Seamless Video Loops for Backgrounds and Presentations Looping video backgrounds add motion to websites and presentations. Creating seamless loops requires careful planning of start and end frames to avoid visible jumps. - URL: https://peasyvideo.com/guides/creating-seamless-video-loops/ - Category: How-To - Reading time: 1 min - Words: 201 Key takeaways: - A seamless loop has identical first and last frames, with smooth motion throughout. - The simplest method: duplicate the clip, reverse the second half, and cross-fade at the midpoint. - <video autoplay muted loop playsinline> - Background loops should be 5-15 seconds long. ## What Makes a Good Loop A seamless loop has identical first and last frames, with smooth motion throughout. The viewer should not be able to detect where the loop restarts. ## Techniques ### Cross-Dissolve The simplest method: duplicate the clip, reverse the second half, and cross-fade at the midpoint. This creates a palindrome loop that plays forward then backward. **Pros:** Works with any footage. **Cons:** Unnatural motion reversal is visible with people or text. ### Match Cut Find a natural loop point where the last frame closely matches the first. Works best with repetitive motion — waves, spinning objects, flickering flames, or particles. ### Freeze Frame Blend Freeze the last few frames and blend them into the first few frames using opacity transitions. Subtle but effective for slow-moving footage like clouds or water. ## Web Implementation ```html <video autoplay muted loop playsinline> <source src="loop.mp4" type="video/mp4"> </video> ``` Key attributes: - `autoplay` + `muted`: Required for autoplay in modern browsers - `playsinline`: Prevents fullscreen on iOS - `loop`: Restarts automatically ## File Size Tips Background loops should be 5-15 seconds long. Longer loops increase file size without adding perceived variety. Compress aggressively — background videos are decorative and tolerate lower quality. ### Video Trimming Without Re-encoding: Lossless Cuts Re-encoding video during trimming degrades quality and takes time. Lossless cutting preserves the original quality by splitting at keyframe boundaries. - URL: https://peasyvideo.com/guides/video-trimming-without-reencoding/ - Category: How-To - Reading time: 1 min - Words: 235 Key takeaways: - Each encode-decode cycle introduces generation loss. - Video is compressed using keyframes (I-frames) and delta frames (P/B-frames). - If your desired cut point falls between keyframes, you have two options: snap to the nearest keyframe (lossless but slightly inaccurate) or re-encode just the frames around the cut point (smart rendering). - Smart rendering re-encodes only the frames between the cut point and the nearest keyframe, copying the rest losslessly. - Audio and video keyframes rarely align — audio may need a tiny re-encode at cut points ## Why Re-encoding Degrades Quality Each encode-decode cycle introduces generation loss. Lossy codecs (H.264, VP9) cannot perfectly reconstruct the original signal, so re-encoding compounds artifacts. For a simple trim operation, this quality loss is unnecessary. ## How Lossless Trimming Works Video is compressed using keyframes (I-frames) and delta frames (P/B-frames). An I-frame contains a complete image; delta frames only store differences from previous frames. Lossless trimming can only cut at I-frame boundaries because delta frames cannot exist without their reference I-frame. ## Keyframe Alignment Typical keyframe intervals: | Source | Interval | |--------|----------| | YouTube download | 2 seconds | | Phone recording | 1-2 seconds | | Screen capture | 2-5 seconds | | Professional edit | 0.5-1 second | If your desired cut point falls between keyframes, you have two options: snap to the nearest keyframe (lossless but slightly inaccurate) or re-encode just the frames around the cut point (smart rendering). ## Smart Rendering Smart rendering re-encodes only the frames between the cut point and the nearest keyframe, copying the rest losslessly. This combines frame-accurate cutting with minimal quality loss — typically 0.5-2 seconds of re-encoded footage per cut. ## Common Pitfalls - Audio and video keyframes rarely align — audio may need a tiny re-encode at cut points - Variable frame rate (VFR) recordings can cause sync issues — convert to constant frame rate first - Subtitle streams are always losslessly copied ### HDR Video: Formats, Compatibility, and Tone Mapping HDR video offers wider color range and higher contrast than SDR. Understanding HDR formats and tone mapping ensures your content displays correctly across devices. - URL: https://peasyvideo.com/guides/hdr-video-formats-compatibility/ - Category: Comparison - Reading time: 1 min - Words: 239 Key takeaways: - Standard Dynamic Range (SDR) uses 8-bit color (16.7 million colors) and a limited brightness range. - Open standard, widely supported. - When HDR content plays on an SDR display, tone mapping compresses the wider dynamic range into the display's capabilities. - YouTube supports HDR10 and HLG. - Master in HDR10 for maximum compatibility ## What HDR Adds Standard Dynamic Range (SDR) uses 8-bit color (16.7 million colors) and a limited brightness range. HDR expands to 10-bit (1 billion colors) or 12-bit color with peak brightness up to 10,000 nits versus SDR's ~100 nits. ## HDR Standards ### HDR10 Open standard, widely supported. Uses static metadata — one brightness setting for the entire video. Supported by virtually all HDR displays. ### HDR10+ Samsung's extension with dynamic metadata — brightness optimization per scene or per frame. Supported by Samsung TVs and Amazon Prime Video. ### Dolby Vision Premium format with 12-bit color and dynamic metadata. Requires licensing but offers the best quality. Supported by Apple, Netflix, Disney+, and premium TVs. ### HLG (Hybrid Log-Gamma) Broadcast-focused standard compatible with both HDR and SDR displays without metadata. Used by BBC, NHK, and YouTube. ## Tone Mapping When HDR content plays on an SDR display, tone mapping compresses the wider dynamic range into the display's capabilities. Poor tone mapping causes washed-out or oversaturated images. ## Web Delivery YouTube supports HDR10 and HLG. Upload in VP9 or AV1 with HDR metadata. Safari supports Dolby Vision in HLS streams. Chrome supports HDR10 via WebM/AV1. ## Practical Advice - Master in HDR10 for maximum compatibility - Always provide an SDR fallback - Use HLG for content that must work on both HDR and SDR - Test on actual HDR displays — monitors and SDR previews cannot accurately represent HDR content ### Video for Email: GIF vs MP4 vs Static Thumbnail Strategies Email clients have inconsistent video support. Understanding fallback strategies ensures your video content reaches every subscriber effectively. - URL: https://peasyvideo.com/guides/video-in-email-strategies/ - Category: Best Practice - Reading time: 1 min - Words: 229 Key takeaways: - Most email clients do not support embedded `<video>` tags. - GIFs are supported by virtually all email clients. - Use a static thumbnail with play button as the default. ## The Email Video Problem Most email clients do not support embedded `<video>` tags. Apple Mail and some iOS/macOS clients are exceptions, but Gmail, Outlook, and Yahoo strip video elements entirely. ## Strategy Comparison ### Animated GIF GIFs are supported by virtually all email clients. They auto-play and loop, catching attention in the inbox. **Pros:** Universal support, auto-play. **Cons:** Large file sizes (>1 MB risks clipping), 256 colors, no audio, triggers spam filters if oversized. ### Static Thumbnail with Play Button An image with a play button overlay linked to a hosted video. This is the most reliable and lightweight option. **Pros:** Tiny file size, works everywhere, tracks clicks. **Cons:** No in-email playback, requires click-through. ### HTML5 Video with Fallback Embed a `<video>` tag for Apple Mail with a GIF or image fallback for other clients. **Pros:** True video for supported clients. **Cons:** Complex HTML, may trigger spam filters. ## Best Practices | Client | Supported | Fallback | |--------|-----------|----------| | Apple Mail | HTML5 video | N/A | | Gmail | Image only | Thumbnail | | Outlook | Image only | Thumbnail | | Yahoo | Image only | Thumbnail | ## Recommendation Use a static thumbnail with play button as the default. Keep GIF animations under 500 KB and 3 seconds. Link to a landing page with the full video — this also captures engagement data. ### Frame Rate Guide: Choosing 24fps, 30fps, or 60fps Frame rate affects perceived motion quality, file size, and the emotional tone of your video. Different contexts call for different frame rates. - URL: https://peasyvideo.com/guides/frame-rate-guide-24-30-60-fps/ - Category: How-To - Reading time: 1 min - Words: 207 Key takeaways: - Frame rate is the number of individual images displayed per second. - The standard for film since the 1920s. - The broadcast standard for NTSC television. - Twice the temporal resolution of 30fps. - Shoot at a higher frame rate than your delivery rate. ## How Frame Rate Affects Perception Frame rate is the number of individual images displayed per second. Higher rates produce smoother motion but larger files and a different visual character. ## 24fps — Cinematic The standard for film since the 1920s. 24fps has a natural motion blur that viewers associate with movies and premium content. It feels cinematic, dramatic, and intentional. **Use for:** Narrative content, brand films, music videos, documentaries. ## 30fps — Standard The broadcast standard for NTSC television. 30fps (29.97 technically) offers smoother motion than 24fps while remaining bandwidth-efficient. Most online content uses 30fps. **Use for:** Tutorials, vlogs, presentations, general web content. ## 60fps — Smooth Twice the temporal resolution of 30fps. Motion appears hyper-smooth, which is ideal for fast action but can make narrative content feel like a soap opera (the 'soap opera effect'). **Use for:** Gaming, sports, UI demonstrations, slow-motion source. ## File Size Impact | Frame Rate | Relative Size | |------------|---------------| | 24fps | 1x (baseline) | | 30fps | 1.25x | | 60fps | 2x | | 120fps | 4x | ## Slow Motion Shoot at a higher frame rate than your delivery rate. 120fps footage played at 30fps produces 4x slow motion. 240fps at 30fps gives 8x slow motion. ### Video Metadata and EXIF Data: What Your Files Contain Video files embed metadata about creation date, camera settings, GPS location, and encoding parameters. Understanding this data helps with organization, privacy, and troubleshooting. - URL: https://peasyvideo.com/guides/video-metadata-exif-data-explained/ - Category: How-To - Reading time: 1 min - Words: 223 Key takeaways: - Stored in the file container (MP4, MOV, MKV). - Videos from smartphones contain GPS coordinates by default. - Phone videos often have a rotation tag (0, 90, 180, 270 degrees) instead of physically rotated pixels. - Critical for format compatibility troubleshooting. ## Types of Video Metadata ### Container Metadata Stored in the file container (MP4, MOV, MKV). Includes title, artist, creation date, and chapter markers. This is what media players and file managers display. ### Stream Metadata Technical properties of video/audio streams: codec, bitrate, resolution, frame rate, color space, and sample rate. Critical for format compatibility troubleshooting. ### EXIF Data Camera-specific metadata embedded during recording. Includes GPS coordinates, camera model, lens info, exposure settings, and orientation. ## Privacy Concerns Videos from smartphones contain GPS coordinates by default. Before sharing publicly: - Strip GPS metadata using a metadata editor - Check for embedded thumbnails (may show original uncropped frame) - Remove creation timestamps if timing is sensitive - Social platforms strip most metadata on upload, but direct file sharing does not ## Useful Metadata Fields | Field | Location | Use | |-------|----------|-----| | Duration | Container | Display/organization | | Resolution | Stream | Compatibility check | | Codec | Stream | Playback troubleshooting | | GPS | EXIF | Location tagging | | Creation Date | Container/EXIF | Sorting/archiving | | Rotation | Container | Orientation correction | ## Rotation Tag Phone videos often have a rotation tag (0, 90, 180, 270 degrees) instead of physically rotated pixels. Some players ignore this tag, causing sideways playback. Re-encoding with physical rotation fixes this permanently. ### Troubleshooting Video Playback: Codec Errors, Black Screens, and Audio Sync Video playback problems — black screens, no audio, stuttering, or sync issues — usually stem from codec incompatibilities or corrupted containers. - URL: https://peasyvideo.com/guides/troubleshooting-video-playback-issues/ - Category: Troubleshooting - Reading time: 1 min - Words: 256 Key takeaways: - Cause: The video codec is not supported by the player or browser. - Cause: Mismatched container and codec. - Cause: Variable frame rate (VFR) recordings from phones or screen capture tools. - Cause: Bitrate exceeds available bandwidth or decode capability. - Cause: GPU driver issues with hardware-accelerated decoding. ## Black Screen with Audio **Cause:** The video codec is not supported by the player or browser. Common with HEVC (H.265) in Chrome/Firefox. **Fix:** Re-encode to H.264, which is universally supported. Alternatively, install the appropriate codec pack for desktop players. ## Audio but No Video (or Vice Versa) **Cause:** Mismatched container and codec. The container (MP4) may declare one codec while containing another, or the audio codec is unsupported. **Fix:** Inspect the file's actual codecs (not just the file extension). Re-encode the problematic stream only. ## Audio-Video Sync Drift **Cause:** Variable frame rate (VFR) recordings from phones or screen capture tools. Players assume constant frame rate and accumulate timing errors. **Fix:** Convert VFR to constant frame rate (CFR) by re-encoding. Set the target frame rate to match the source's average frame rate. ## Stuttering and Buffering **Cause:** Bitrate exceeds available bandwidth or decode capability. 4K HEVC requires significant CPU/GPU power. **Fix:** Reduce resolution or bitrate. Enable hardware acceleration in the player. For streaming, use adaptive bitrate with a lower starting quality. ## Green or Purple Artifacts **Cause:** GPU driver issues with hardware-accelerated decoding. Common with AMD GPUs and VP9/AV1 content. **Fix:** Update GPU drivers. Disable hardware acceleration in the browser (Settings > System). If the issue is in an exported file, the encoder may have a bug — try a different encoder. ## File Won't Open **Cause:** Corrupted container header, incomplete download, or wrong file extension. **Fix:** Try renaming to the correct extension. Use a repair tool that rebuilds the container index from the stream data. ## Glossary (43 terms) ### ABR (Adaptive Bitrate Streaming) A streaming technique that dynamically adjusts video quality based on the viewer's network conditions. - URL: https://peasyvideo.com/glossary/abr/ ### AV1 (AOMedia Video 1) A royalty-free video codec offering 30-50% better compression than H.265, developed by the Alliance for Open Media. - URL: https://peasyvideo.com/glossary/av1/ ### B-Frame (Bidirectional Predicted Frame) A video frame that references both preceding and following frames for highly efficient compression. - URL: https://peasyvideo.com/glossary/b-frame/ ### Bitrate (Video) (Video Bitrate) The amount of video data processed per second, directly affecting quality and file size of the output. - URL: https://peasyvideo.com/glossary/bitrate-video/ ### CBR (Constant Bitrate) A video encoding mode maintaining a fixed data rate throughout, providing predictable file sizes and bandwidth usage. - URL: https://peasyvideo.com/glossary/cbr/ ### CFR (Constant Frame Rate) A video encoding where frames are evenly spaced at a fixed interval, preferred for editing and streaming compatibility. - URL: https://peasyvideo.com/glossary/cfr/ ### Chroma Key (Chroma Key Compositing) A technique replacing a solid-color background (green screen) with another image or video. - URL: https://peasyvideo.com/glossary/chroma-key/ ### Color Grading (Video Color Grading) The process of altering the color and tone of video footage to achieve a desired visual mood or style. - URL: https://peasyvideo.com/glossary/color-grading/ ### Container Format (Video Container Format) A file format that wraps together video, audio, subtitles, and metadata streams (e.g. MP4, MKV, WebM). - URL: https://peasyvideo.com/glossary/container-format/ ### CRF (Constant Rate Factor) A quality-based encoding parameter where lower values produce higher quality at the cost of larger file sizes. - URL: https://peasyvideo.com/glossary/crf/ ### DASH (Dynamic Adaptive Streaming over HTTP) An adaptive streaming standard that breaks video into small HTTP-served segments at multiple quality levels. - URL: https://peasyvideo.com/glossary/dash/ ### Deinterlacing (Video Deinterlacing) The process of converting interlaced video into progressive frames for smooth display on modern screens. - URL: https://peasyvideo.com/glossary/deinterlacing/ ### Dolby Vision (Dolby Vision HDR) A proprietary HDR format using dynamic metadata to optimize brightness and color on a scene-by-scene basis. - URL: https://peasyvideo.com/glossary/dolby-vision/ ### Frame Blending (Video Frame Blending) A technique that creates intermediate frames by blending adjacent frames to smooth slow-motion or speed changes. - URL: https://peasyvideo.com/glossary/frame-blending/ ### Frame Rate (Video Frame Rate) The number of individual frames displayed per second in a video, measured in fps. - URL: https://peasyvideo.com/glossary/frame-rate/ ### GOP (Group of Pictures) A sequence of video frames starting with a keyframe, defining the compression structure between keyframes. - URL: https://peasyvideo.com/glossary/gop/ ### H.264 (Advanced Video Coding (AVC)) The most widely used video codec, balancing compression efficiency with broad hardware and software compatibility. - URL: https://peasyvideo.com/glossary/h264/ ### H.265 (High Efficiency Video Coding (HEVC)) A video codec offering ~50% better compression than H.264 at equivalent quality, used for 4K/8K content. - URL: https://peasyvideo.com/glossary/h265/ ### HDR10 (High Dynamic Range 10) An open HDR standard using static metadata, 10-bit color depth, and Rec. 2020 color space for brighter displays. - URL: https://peasyvideo.com/glossary/hdr10/ ### HLG (Hybrid Log-Gamma) An HDR standard that is backward-compatible with SDR displays, developed by BBC and NHK for broadcast use. - URL: https://peasyvideo.com/glossary/hlg/ ### HLS (HTTP Live Streaming) An Apple-developed adaptive streaming protocol using .m3u8 playlists and .ts segments, widely supported on the web. - URL: https://peasyvideo.com/glossary/hls/ ### I-Frame (Intra-coded Frame) A self-contained video frame that does not reference other frames, serving as a random access point in the stream. - URL: https://peasyvideo.com/glossary/i-frame/ ### Interlacing (Video Interlacing) A technique displaying alternating odd/even scan lines per frame, used in older broadcast standards. - URL: https://peasyvideo.com/glossary/interlacing/ ### Keyframe (Video Keyframe) A complete frame in a video that serves as a reference point for subsequent compressed frames. - URL: https://peasyvideo.com/glossary/keyframe/ ### Letterboxing (Letterbox Format) Adding black bars to the top and bottom of a video to display widescreen content in a narrower frame. - URL: https://peasyvideo.com/glossary/letterboxing/ ### LUT (Lookup Table) A color transformation preset that maps input color values to output values, used for color grading and correction. - URL: https://peasyvideo.com/glossary/lut/ ### Motion Estimation (Video Motion Estimation) An encoding technique that identifies movement between frames to efficiently compress video using motion vectors. - URL: https://peasyvideo.com/glossary/motion-estimation/ ### Muxing (Multiplexing) The process of combining multiple audio, video, and subtitle streams into a single container file. - URL: https://peasyvideo.com/glossary/muxing/ ### Optical Flow (Optical Flow Interpolation) An AI-based method for generating new frames by analyzing pixel motion between existing frames for smooth slow-motion. - URL: https://peasyvideo.com/glossary/optical-flow/ ### P-Frame (Predicted Frame) A video frame encoded as differences from the previous reference frame, providing moderate compression. - URL: https://peasyvideo.com/glossary/p-frame/ ### Pillarboxing (Pillarbox Format) Adding black bars to the sides of a video to display 4:3 content in a 16:9 widescreen frame. - URL: https://peasyvideo.com/glossary/pillarboxing/ ### Proxy Editing (Proxy Video Editing) Editing with lower-resolution copies of footage for smoother playback, then relinking to the originals for final export. - URL: https://peasyvideo.com/glossary/proxy-editing/ ### Rec. 2020 (ITU-R BT.2020 Color Space) A wide color gamut standard for UHD/4K video, covering 75% of the visible color spectrum versus 36% for Rec. 709. - URL: https://peasyvideo.com/glossary/rec-2020/ ### Rec. 709 (ITU-R BT.709 Color Space) The standard color space for HD video, defining the color primaries and transfer function used by most displays. - URL: https://peasyvideo.com/glossary/rec-709/ ### Stabilization (Video Stabilization) A technique that reduces unwanted camera shake and motion in recorded video footage. - URL: https://peasyvideo.com/glossary/stabilization/ ### Subtitle (Video Subtitle) Text displayed on video representing dialogue or narration, either embedded (hardcoded) or as separate tracks. - URL: https://peasyvideo.com/glossary/subtitle/ ### Timecode (Video Timecode) A sequence of numeric codes (HH:MM:SS:FF) assigned to each video frame for precise identification and synchronization. - URL: https://peasyvideo.com/glossary/timecode/ ### Transcoding (Video Transcoding) Converting video from one codec or format to another, often for compatibility or size reduction. - URL: https://peasyvideo.com/glossary/transcoding/ ### Trimming (Video Trimming) Removing unwanted portions from the beginning or end of a video clip. - URL: https://peasyvideo.com/glossary/trimming/ ### Two-Pass Encoding (Two-Pass Video Encoding) A video encoding method that analyzes the video in a first pass to optimize bitrate allocation in the second. - URL: https://peasyvideo.com/glossary/two-pass-encoding/ ### VBR (Variable Bitrate) A video encoding mode that allocates more bits to complex scenes and fewer to simple ones for better quality per byte. - URL: https://peasyvideo.com/glossary/vbr/ ### VFR (Variable Frame Rate) A recording mode where the frame rate changes during capture, common in screen recordings and mobile video. - URL: https://peasyvideo.com/glossary/vfr/ ### Video Codec (Video Codec) Software that compresses and decompresses video data (e.g. H.264, H.265/HEVC, VP9, AV1). - URL: https://peasyvideo.com/glossary/video-codec/ ## API Base URL: https://peasyvideo.com/api/v1/ | Endpoint | Description | |----------|-------------| | GET /api/v1/tools/ | List all tools (filterable by category) | | GET /api/v1/tools/{slug}/ | Tool detail with description, steps, FAQ | | GET /api/v1/categories/ | Tool categories | | GET /api/v1/formats/ | File formats reference | | GET /api/v1/formats/{slug}/ | Format detail with history, pros/cons | | GET /api/v1/conversions/ | Format conversion guides | | GET /api/v1/glossary/ | Terminology with definitions | | GET /api/v1/glossary/{slug}/ | Term with simple + technical explanations, code examples, references | | GET /api/v1/guides/ | Educational guides (filterable by category, audience_level) | | GET /api/v1/guides/{slug}/ | Full guide with content, takeaways, ToC, related guides | | GET /api/v1/use-cases/ | Real-world use cases by industry | | GET /api/v1/search/?q={query} | Cross-model search | | GET /api/v1/sites/ | All 16 Peasy sites | OpenAPI spec: https://peasyvideo.com/api/openapi.json ## Content Negotiation All pages support Markdown output for AI agents: - Add `?format=md` to any page URL - Or send `Accept: text/markdown` header ## Platform Stats - 251 tools across 16 sites - 131 file formats documented - 1484 format conversion guides - 695 glossary terms (with simple + technical explanations) - 645 educational guides (avg 1,308 words) - 302 real-world use cases