[FFmpeg-trac] #2110(undetermined:closed): Mov file when used with FFMPEG loses audio all together while track is there

[FFmpeg]

#2110: Mov file when used with FFMPEG loses audio all together while track is
there
-------------------------------------+-------------------------------------
             Reporter:  vkroutik     |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  mov          |               Resolution:
             Blocking:               |  worksforme
Analyzed by developer:  0            |               Blocked By:
                                     |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:   => mov
 * resolution:   => worksforme
 * status:  new => closed
 * component:  FFmpeg => undetermined


Comment:

 Your sample contains an unusual channel layout, afaict it contains no
 information how the audio channels should be interpreted;-(

 FFmpeg by default chooses the audio channel with the highest bit-rate,
 generally this is not a bad idea, but does not work for your sample.

 The following commands work fine here:
 {{{
 $ ffmpeg -i TorgashiShort.mov -vcodec copy -acodec copy -map 0 -dn out.mov
 $ ffmpeg -i TorgashiShort.mov -vcodec copy -acodec copy -map 0:0 -map 0:1
 -map 0:2 out.mov
 }}}
 I guess the following is what most people would actually want:
 {{{
 $ ffmpeg -i TorgashiShort.mov -vcodec copy -filter_complex amerge -acodec
 pcm_s24le out.mov
 }}}
 The following simple command produces an output file with audio, but is
 probably not what you want (assuming the original sample does not contain
 two independent mono streams, but a stereo stream encoded as two singe-
 channel streams):
 {{{
 $ ffmpeg -i TorgashiShort.mov -vcodec copy -acodec copy -map 0:0 -map 0:1
 out.mov
 }}}

 If you have any indication that I am wrong and that the file does contain
 information on how the audio channels should be interpreted, please
 elaborate!

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2110#comment:4>
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