[FFmpeg-trac] #3430(undetermined:open): Crash in atempo if a duration was specified

[FFmpeg]

#3430: Crash in atempo if a duration was specified
-------------------------------------+-------------------------------------
             Reporter:  Waraqa       |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  crash        |               Resolution:
  atempo regression                  |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Cigaes):

 You should build with {{{--assert-level=2}}} when you intend to debug, you
 would get more informative results:
 {{{
 Assertion frame->format == link->format failed at
 libavfilter/avfilter.c:1147
 }}}
 Apparently, {{{af_atempo}}} sends a frame with format {{{-1}}}, I am
 trying to find out why.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3430#comment:5>
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