[FFmpeg-trac] #7862(undetermined:new): Default channel layout for 6 channels

[FFmpeg]

#7862: Default channel layout for 6 channels
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             Reporter:  lukasf       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  channel      |               Blocked By:
  layout                             |
  av_get_default_channel_layout      |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Summary of the bug:

 I have noticed that av_get_default_channel_layout() returns
 AV_CH_LAYOUT_5POINT1_BACK as default layout for 6 channels. Is this a bug
 or is this intended? Normally, 5.1 audio has side left/right channels, not
 back left/right. So it should be AV_CH_LAYOUT_5POINT1, not
 AV_CH_LAYOUT_5POINT1_BACK.

 Surround back channels are normally used only in 7.1 setups, not in 5.1.

 The default could be easily fixed by re-ordering the values in
 channel_layout_map.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7862>
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