[FFmpeg-user] Alternative MP4 file extensions compatibility

Paul B Mahol onemda at gmail.com
Sun May 5 12:36:10 EEST 2024

On Sun, May 5, 2024 at 11:30 AM Enrico Palmeri via ffmpeg-user <
ffmpeg-user at ffmpeg.org> wrote:

> Hi, I normallyuse Ffmpeg to cut and join AAC audio files with concat and
> SS copy commands. These commands work with general mp4 file container
> and .mp4 file extension only. Most of the mp4 files contain also a
> videotrack, but many apps produce audio only AAC files with .m4a
> extension for general audio, .m4b extension for audiobooks and .m4r
> extension for ringtones instead of the general .mp4 extension. In order
> to work with these files, I am am forced to rename the file extension
> everytime. I woulb be confortable if FFmpeg was able to deal with these
> alternative extesions for mpeg-4 audio files.
.m4a and .m4b are already supported, .m4r is not.

> Thank you for your interest
> Yours faithfully
> Enrico Palmeri
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