[FFmpeg-trac] #6318(undetermined:new): Problem with -filter_complex and DNxHD with ffmpeg 3.3

[FFmpeg]

#6318: Problem with -filter_complex and DNxHD with ffmpeg 3.3
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  paulpacifico                       |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  important    |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  dnxhd        |               Blocked By:
  amerge regression                  |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cus):

 * reproduced:  0 => 1


Comment:

 Reproducible with -threads 11 or more:


 {{{
 ffmpeg -threads 11 -i "DNxHD_4_Mono_Channels.mov" -filter_complex
 "[0:v]null[vout];[0:a:0][0:a:1]amerge[aout]" -map [vout] -map [aout]
 "test.mp4"
 }}}


 Regression since af1761f7b5b1b72197dc40934953b775c2d951cc.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6318#comment:5>
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