AVI vs Y4M
A detailed comparison of AVI Video and YUV4MPEG2 — file size, quality, compatibility, and which format to choose for your workflow.
AVI Video
Video FilesAVI is a legacy Microsoft multimedia container that stores audio and video data. While largely superseded by modern formats, it remains widely recognized and is produced by many older devices and screen recorders.
About AVI filesYUV4MPEG2
Video FilesYUV4MPEG2 (Y4M) is a simple uncompressed video format that stores raw YUV pixel data with a minimal header. It is widely used as an intermediate format for video processing and quality benchmarking where no compression artifacts are acceptable.
About Y4M filesStrengths Comparison
AVI Strengths
- Simple, well-documented format — trivial for any video library to parse.
- Universal Windows playback since Video for Windows in 1992.
- Low encoding overhead — interleaved structure is fast to write.
- Works with any codec technically, including modern ones.
Y4M Strengths
- Uncompressed raw YUV — codec benchmark truth.
- Dead-simple header.
- Universal codec development support.
Limitations
AVI Limitations
- Aging container — no native support for chapters, subtitles, or multi-audio selection.
- File-size limits (2 GB original, 4 GB with OpenDML) break for HD content.
- Variable-framerate video causes sync drift.
- Larger than equivalent MP4 or MKV due to container overhead.
- Poor support on iOS and Android.
Y4M Limitations
- Enormous file sizes.
- Development-only — not for consumption.
- No metadata beyond basic stream params.
Technical Specifications
| Specification | AVI | Y4M |
|---|---|---|
| MIME type | video/x-msvideo | video/x-yuv4mpeg2 |
| Extension | .avi | .y4m |
| Container | RIFF | — |
| Max file size | 2 GB (original); 4 GB (OpenDML extension) | — |
| Codec support | Any codec via FourCC identifiers | — |
| Pixel format | — | YUV 4:2:0, 4:2:2, 4:4:4 |
| Header | — | ASCII single line |
Typical File Sizes
AVI
- 10-min video (XviD / MP3) 100-200 MB
- 45-min TV episode (DivX) 350-700 MB
- 2-hour movie (DVD rip) 700 MB - 1.4 GB
Y4M
- 10 sec 1080p Y4M ~600 MB
- 1 min 4K Y4M ~14 GB
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Frequently Asked Questions
AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft in 1992. It interleaves audio and video data streams and supports various codecs, though it lacks native support for modern features like subtitles and chapters.
AVI (Audio Video Interleave) is a multimedia container formato introduced by Microsoft in 1992. It interleaves audio e video data streams e suporta various codecs, though it lacks native support para moderno features like subtitles e chapters.
AVI files play in VLC (recommended, free), Windows Media Player, KMPlayer, and most video editing software. Some AVI files may require specific codec packs depending on the encoding used.
AVI arquivos reproduzir in VLC (recommended, grátis), Windows Media Player, KMPlayer, e most video editando software. Some AVI arquivos may require specific codec packs depending no codificação used.
MP4 is the better choice for almost all modern uses since it offers better compression, wider compatibility, and support for subtitles and chapters. AVI is mainly encountered with legacy video files and older camera recordings.
MP4 is the better choice para almost all moderno uses since it oferece better compressão, wider compatibilidade, e support para subtitles e chapters. AVI is mainly encountered com legacy video arquivos e older camera recordings.