[FFmpeg-trac] #9153(undetermined:new): When specifying -acodec nellymoser ffmpeg does not recognize stream specifier

[FFmpeg]

#9153: When specifying -acodec nellymoser ffmpeg does not recognize stream
specifier
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             Reporter:  haraldbre     |                     Type:  defect
               Status:  new           |                 Priority:  normal
            Component:  undetermined  |                  Version:  4.2
             Keywords:  acodec        |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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 Summary of the bug:
 Concatenating nellymoser encoded audio streams to .mp3 usually works when
 setting input codecs via "-acodex nellymoser". In some instances however
 it fails:

 Stream specifier ':3' in filtergraph description [0:0][0:2][0:3]
 concat=n=3:v=0:a=1 matches no streams.

 When setting input codecs individually via "-codec:a:0 nellymoser
 -codec:a:1 nellymoser .." there is no problem.

 How to reproduce:
 ffmpeg -acodec nellymoser -i
 http://www.hwjyw.com/textbook/dzjc/zh/cd12/main11/content/CzdB_001.swf
 -filter_complex "[0:0][0:2][0:3] concat=n=3:v=0:a=1" temp.mp3
 ==>
 [swf @ 0x5620fa937240] SWF compressed file detected
 Input #0, swf, from
 'http://www.hwjyw.com/textbook/dzjc/zh/cd12/main11/content/CzdB_001.swf':
   Duration: 00:00:02.74, bitrate: 3137 kb/s
     Stream #0:0: Audio: nellymoser, 44100 Hz, mono, flt
     Stream #0:1: Video: rawvideo (ARGB / 0x42475241), argb, 149x119, 25
 fps, 25 tbr, 25 tbn
     Stream #0:2: Audio: nellymoser, 44100 Hz, mono, flt
 Stream specifier ':3' in filtergraph description [0:0][0:2][0:3]
 concat=n=3:v=0:a=1 matches no streams.

 ffmpeg -codec:a:0 nellymoser -codec:a:1 nellymoser -codec:a:2 nellymoser
 -i http://www.hwjyw.com/textbook/dzjc/zh/cd12/main11/content/CzdB_001.swf
 -filter_complex "[0:0][0:2][0:3] concat=n=3:v=0:a=1" temp.mp3
 ==>
 [swf @ 0x556d10114240] SWF compressed file detected
 [swf @ 0x556d10114240] Could not find codec parameters for stream 0
 (Audio: none, 44100 Hz, mono): unknown codec
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 [swf @ 0x556d10114240] Could not find codec parameters for stream 2
 (Audio: none, 44100 Hz, mono): unknown codec
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 [swf @ 0x556d10114240] Could not find codec parameters for stream 3
 (Audio: none, 44100 Hz, mono): unknown codec
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 Input #0, swf, from
 'http://www.hwjyw.com/textbook/dzjc/zh/cd12/main11/content/CzdB_001.swf':
   Duration: 00:00:04.31, bitrate: 1996 kb/s
     Stream #0:0: Audio: nellymoser, 44100 Hz, mono
     Stream #0:1: Video: rawvideo (ARGB / 0x42475241), argb, 149x119, 25
 fps, 25 tbr, 25 tbn
     Stream #0:2: Audio: nellymoser, 44100 Hz, mono
     Stream #0:3: Audio: nellymoser, 44100 Hz, mono
 Stream mapping:
   Stream #0:0 (nellymoser) -> concat:in0:a0
   Stream #0:2 (nellymoser) -> concat:in1:a0
   Stream #0:3 (nellymoser) -> concat:in2:a0
   concat -> Stream #0:0 (libmp3lame)
 ...

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Ticket URL: <https://trac.ffmpeg.org/ticket/9153>
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