How-to guide
How to extract audio from an AVI file
AVI is the old-school Microsoft container — still common for archived recordings, early camcorder footage and Windows-era screen grabs. Its audio is usually MP3 or PCM. VideoSplit reads AVI on the modern browser decoder path, which is more forgiving than a lot of legacy converters.
AVI does not store precise timing information the way modern containers do, so very long AVIs occasionally drift by a few milliseconds. For editing work, the tiny offset is inaudible; for lip-sync to the original picture, you may want to nudge by a frame.
Step-by-step
- Open VideoSplit.io. Chrome, Firefox and Edge all handle AVI via the Web Audio decoder path.
- Drop your .avi file. Drag and drop. Older AVIs are usually small (DivX 700 MB movie rips and similar).
- Pick WAV for highest quality. Since AVI audio is often already MP3, WAV export just decodes once and writes it out. MP3 export re-encodes, which is fine but slightly lossy.
- Download. Saves with the original filename and your chosen extension.
Tips for better results
- Some very old AVI files use ADPCM or uncompressed PCM; both decode fine.
- If the AVI has an out-of-sync audio offset in the file header (common on older camcorder AVIs), extraction strips the offset — you will get a clean stream starting at 00:00.
- For 2 GB+ AVI files on 32-bit browsers, trim before upload — that limit is a browser constraint, not ours.
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