saveas.now

AVI → M4A, sound from old footage

The audio of a legacy recording, decoded and saved as modern AAC without converting the whole video.

Runs in your browser. Your file never leaves your computer.

Drop files hereor click to choose, or paste

Sometimes only the sound of an old AVI matters: an interview taped in 2004, a rehearsal, a speech. Extracting just the audio skips re-encoding the video entirely, decoding the legacy soundtrack in software through the bundled decoder and saving 256 kbps AAC. It finishes far faster than a full conversion of the same file. Old MP3 or PCM tracks come through cleanly; genuinely exotic audio codecs fail with a named reason rather than silence.

AVIAudio Video Interleave700 MBAVI, camcorder transferlegacylargeM4AMPEG-4 audio (AAC)42 MBM4A, the audio alonelossycompressed
The listenable part rescued without waiting on a full video re-encode.

Questions

Why extract instead of converting the video?

Speed and purpose: audio-only decoding is much lighter, and when the recording's value is the sound, the video re-encode is wasted work.

What audio do old AVIs usually contain?

MP3 or plain PCM most often, both decoded without drama. Rare proprietary audio fails with the codec named.

Where does the work happen?

In your browser; the decoder is fetched once and runs locally.

All video conversions

Part of convert video in your browser. Every other conversion is on the conversions index.