Convert MP4 to MP3
Pull the audio track out of an MP4 video and save it as MP3.
Frequently asked questions
Does it work on other video containers too?
Yes — MOV, WebM, MKV and AVI all work the same way; the file extension doesn't matter, ffmpeg reads the actual container.
What if the video has no audio track?
You'll get a clear error instead of a silent MP3 — check the source file has sound first.