Paul Webster wrote: 
> Maybe LMS would be able to play them - the audio part - with the right
> transcoder in place on the LMS server.
> 
> If one of those files is readily available on the Internet perhaps you
> could post a link for others to try.

MEPG-4 has lots of possible variation for audio and video.

ffmpeg can do it something if audio is in AAC 2chan format "-vn -acodec
copy -f adts"  - no video, copy audio and send it as AAC in ADTS forma

However if audio is not in AAC format - then explicit conversion would
be needed. Still possible.

If the MP4 track have separate audio & video tracks. An audio is in M4A
format and probably are streamable (i.e. "faststart" - all metadata etc
at start of file before mdat)  - then it should be possible for current
LMS MP4 handler to be extended to identify the audio track and ignore
the video track.


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