[FFmpeg-trac] #9912(undetermined:new): channel_layout=unknown

[FFmpeg]

#9912: channel_layout=unknown
-------------------------------------+-------------------------------------
             Reporter:  Mia Sia      |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
  channel_layout                     |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Description changed by Mia Sia:

Old description:

> Summary of the bug:
> How to reproduce:
>
> % ffprobe -i 2.1_channel_layout.wav -show_entries stream=channel_layout
> [STREAM]
> channel_layout=unknown
> [/STREAM]
>
> which in ffmpeg 5.0.1
> show_entries stream=channel_layout
> [STREAM]
> channel_layout=2.1
> [/STREAM]
>
> same for 4.1 layout

New description:

 Summary of the bug:

 in ffmpeg 5.1.1
 % ffprobe -i 2.1_channel_layout.wav -show_entries stream=channel_layout
 -hide_banner
 Input #0, wav, from '2.1_channel_layout.wav':
   Metadata:
     encoder         : Lavf59.23.100
   Duration: 00:00:05.00, bitrate: 2304 kb/s
   Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 3
 channels, s16, 2304 kb/s
 [STREAM]
 channel_layout=unknown
 [/STREAM]

 which in ffmpeg 5.0.1
 % ffprobe -i 2.1_channel_layout.wav -show_entries stream=channel_layout
 -hide_banner
 Input #0, wav, from '2.1_channel_layout.wav':
   Metadata:
     encoder         : Lavf59.23.100
   Duration: 00:00:05.00, bitrate: 2304 kb/s
   Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2.1,
 s16, 2304 kb/s
 [STREAM]
 channel_layout=2.1
 [/STREAM]

 same for 4.1 layout

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Ticket URL: <https://trac.ffmpeg.org/ticket/9912#comment:3>
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