[FFmpeg-trac] #2629(undetermined:new): "-acodec copy" is conflict with "-vol 100"

[FFmpeg]

#2629: "-acodec copy" is conflict with "-vol  100"
-------------------------------------+-------------------------------------
             Reporter:  baituxp      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  acodec copy  |               Blocked By:
  , vol                              |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 % ffmpeg -i a.ts -acodec copy -f output1.ts - acodec aac -f -vol 100
 output2.ts
 ffmpeg 1.1.1
 built on linux 5.3
 }}}
 I think "-acodec copy" is designed to confict within "-vol xxx" in a
 single output stream, but in different output streams,  there is no
 effect. However, ffmpeg rejects to run when detecting "-acodec copy" and
 "-vol xxx" in a same commandline anytime.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2629>
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