[FFmpeg-trac] #8035(undetermined:new): Issue with audio channel mapping

FFmpeg trac at avcodec.org
Wed Jul 24 17:48:10 EEST 2019

#8035: Issue with audio channel mapping
             Reporter:  svihalekjan  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
  filter_complex amerge audio        |
  channel mapping                    |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by svihalekjan):

 Replying to [comment:4 Cigaes]:
 > I think:
 > {{{
 > -vf "[0:a:0][0:a:1]amerge,pan=7.1|c0=c0|c1=c1
 > }}}
 > should just work, without anything about anullsrc.

 Thanks, I am trying to do that with -af instead of -vf (is that right?)
 but receiving no audio output.

 ffmpeg -i "audio_channel_mapping_issue_2_22.mxf" -map 0:v -y -c:v
 mpeg2video -s 1920x1080 -video_format pal -profile:v 0 -level:v 2 -r 25
 -aspect 16:9 -flags +ildct -b:v 50000k -minrate 50000k -maxrate 50000k -af
 "[0:a:0][0:a:1]amerge,pan=7.1|c0=c0|c1=c1" -acodec pcm_s24le OUTPUT.mxf

 I am probably forgetting about something here. Sorry, I have not
 encountered panning in ffmpeg yet.

Ticket URL: <https://trac.ffmpeg.org/ticket/8035#comment:5>
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