16 June 2026 | 5 min read
Turning a video into an MP3 or WAV without re-encoding twice
Interviews, webinars, camera files: sometimes all you need is the soundtrack, at the quality the camera actually recorded.
A video file is a container with at least one video stream and one audio stream. Extraction means reading that audio stream and writing it out on its own. Done well, nothing is degraded that was not already degraded by the camera.
Know what is inside first
Camera audio is usually AAC at 48 kHz, sometimes uncompressed PCM on higher end bodies, occasionally 32 kHz on older consumer cameras. Check before you export, because that number determines what you should ask for.
Choose the output for the job
- WAV at the source sample rate, 24 bit: editing, sync, mixing.
- MP3 320 kbps: sending an interview to a transcriber or a client.
- AIFF: studio pipelines that standardise on it.
Avoid the double encode
If the source audio is AAC and you export MP3, you are stacking two lossy codecs. For anything that matters, extract to WAV first, then make the MP3 from that WAV if you still need one.
Keep it off other people's servers
Uploading unreleased footage to a free conversion site is a real risk, contractually and practically. Browser-based extraction decodes the container on your machine, so nothing is transmitted and nothing is retained.
Formats that work
MP4, MOV and WEBM cover almost everything shot on camera or recorded on a call. Drop the file in, check the readout, choose sample rate, bit depth and format, then export.