[FFmpeg-trac] #9723(avfilter:new): ebur128 with peak=true has broken output audio channels

[FFmpeg]

#9723: ebur128 with peak=true has broken output audio channels
-------------------------------------+-------------------------------------
             Reporter:  John         |                     Type:  defect
  Warburton                          |
               Status:  new          |                 Priority:  normal
            Component:  avfilter     |                  Version:
             Keywords:  channels,    |  unspecified
  ebur128                            |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 % ffmpeg -v debug -i .\alman.m4a -af "ebur128=peak=true" ebur128test.mp4
 }}}
 This is with ffmpeg version N-106566-ge254af3154, built with gcc for
 mingw-w64 on April 11th, 2022.

 With peak=true, we get (see below for fuller output):
 {{{
 [SWR @ 00000235a1c6c4c0] Input channel layout "0 channels" is invalid or
 unsupported.
 [SWR @ 00000235a1c6c4c0] Output channel layout "0 channels" is invalid or
 unsupported.
 [SWR @ 00000235a1c6c4c0] Using dblp internally between filters
 [SWR @ 00000235a1c6c4c0] Input channel count and layout are unset
 [Parsed_ebur128_0 @ 00000235a12b3840] Failed to configure output pad on
 Parsed_ebur128_0
 ...
 Error reinitializing filters!
 Failed to inject frame into filter network: Invalid argument
 Error while processing the decoded data for stream #0:0
 }}}

 Now, here is a fuller grab of the output:
 {{{
 [Parsed_ebur128_0 @ 00000235a12b3840] Setting 'peak' to value 'true'
 [Parsed_ebur128_0 @ 00000235a12b3840] EBU +9 scale
 [graph_0_in_0_0 @ 00000235a12b2c80] Setting 'time_base' to value '1/44100'
 [graph_0_in_0_0 @ 00000235a12b2c80] Setting 'sample_rate' to value '44100'
 [graph_0_in_0_0 @ 00000235a12b2c80] Setting 'sample_fmt' to value 'fltp'
 [graph_0_in_0_0 @ 00000235a12b2c80] Setting 'channel_layout' to value
 'stereo'
 [graph_0_in_0_0 @ 00000235a12b2c80] tb:1/44100 samplefmt:fltp
 samplerate:44100 chlayout:stereo
 [format_out_0_0 @ 00000235a12a6700] Setting 'sample_fmts' to value 'fltp'
 [format_out_0_0 @ 00000235a12a6700] Setting 'sample_rates' to value
 '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
 [Parsed_ebur128_0 @ 00000235a12b3840] auto-inserting filter
 'auto_aresample_0' between the filter 'graph_0_in_0_0' and the filter
 'Parsed_ebur128_0'
 [format_out_0_0 @ 00000235a12a6700] auto-inserting filter
 'auto_aresample_1' between the filter 'Parsed_ebur128_0' and the filter
 'format_out_0_0'
 [AVFilterGraph @ 00000235a12a5c80] query_formats: 4 queried, 3 merged, 6
 already done, 0 delayed
 [auto_aresample_0 @ 00000235a1c11bc0] [SWR @ 00000235a1c11d40] Using fltp
 internally between filters
 [auto_aresample_0 @ 00000235a1c11bc0] ch:2 chl:stereo fmt:fltp r:44100Hz
 -> ch:2 chl:stereo fmt:dbl r:44100Hz
 [SWR @ 00000235a1c6c4c0] Input channel layout "0 channels" is invalid or
 unsupported.
 [SWR @ 00000235a1c6c4c0] Output channel layout "0 channels" is invalid or
 unsupported.
 [SWR @ 00000235a1c6c4c0] Using dblp internally between filters
 [SWR @ 00000235a1c6c4c0] Input channel count and layout are unset
 [Parsed_ebur128_0 @ 00000235a12b3840] Failed to configure output pad on
 Parsed_ebur128_0
 [Parsed_ebur128_0 @ 00000235a12b3840] Summary:

   Integrated loudness:
     I:         -70.0 LUFS
     Threshold:   0.0 LUFS

   Loudness range:
     LRA:         0.0 LU
     Threshold:   0.0 LUFS
     LRA low:     0.0 LUFS
     LRA high:    0.0 LUFS

   True peak:
     Peak:       -inf dBFS
 Error reinitializing filters!
 Failed to inject frame into filter network: Invalid argument
 Error while processing the decoded data for stream #0:0
 [AVIOContext @ 00000235a12aae00] Statistics: 0 bytes written, 0 seeks, 0
 writeouts
 [AVIOContext @ 00000235a1280440] Statistics: 74449 bytes read, 2 seeks
 Conversion failed!
 }}}

 With peak=sample or any other value, conversion proceeds normally.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9723>
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