[FFmpeg-trac] #2899(avfilter:open): -map_channel / -af pan are not processing 12 channel audio inputs

[FFmpeg]

#2899: -map_channel / -af pan are not processing 12 channel audio inputs
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             Reporter:  hackeron    |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  important   |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
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Changes (by Cigaes):

 * status:  new => open
 * component:  undetermined => avfilter
 * reproduced:  0 => 1


Comment:

 {{{af_pan}}} does not support streams with unknown channel layout yet. It
 should fail with a clearer error return, though.

 In the meantime, you can get it to work by setting a dummy channel layout
 to the input, using {{{aformat=channel_layouts=0xFFF}}} for example.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2899#comment:3>
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