[FFmpeg-trac] #7583(avfilter:open): wrong frames generated by overlay filter when y is negative and dynamic

[FFmpeg]

#7583: wrong frames generated by overlay filter when y is negative and dynamic
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             Reporter:  tanersener   |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avfilter
              Version:  git-master   |               Resolution:
             Keywords:  overlay      |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by tanersener):

 Replying to [comment:4 richardpl]:
 > Replying to [comment:2 tanersener]:
 > >  > add threads=1 as workaround.
 > >
 > > Adding **-threads 1** didn't make any difference for me.
 >
 > threads=1 is filter option not flag.. read what i wrote would you?


 Using threads=1 option improves output a little but doesn't fix the issue.
 You can see the output file
 [https://trac.ffmpeg.org/attachment/ticket/7583/failure_with_threads_1.mp4
 failure_with_threads_1.mp4].

 By the way, thanks for trying to help me but I never used **threads**
 option before and [https://ffmpeg.org/ffmpeg-filters.html FFmpeg Filters
 Documentation] does not list any **threads** option for filters used so I
 googled your **threads=1** recommendation. All search results from first
 page corrected **threads=1** as **-threads 1**. This is why I tried using
 **-threads 1**. Just wanted to let you know.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7583#comment:5>
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