[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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Comment (by Cigaes):

 Old versions did not handle channel layouts very cleanly. If it worked (I
 find it surprising, the date you give is before the addition of channel
 mappings), it was by chance.

 The command you show does not work because you add two audio filter
 chains: the second one overrides the first one. You have to use a single
 filter chain.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2899#comment:5>
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