[FFmpeg-trac] #9592(ffmpeg:new): using -filter-complex to concatenate .mp4 hangs

[FFmpeg]

#9592: using -filter-complex to concatenate .mp4 hangs
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             Reporter:  Jeffrey Wilson  |                    Owner:  (none)
                 Type:  defect          |                   Status:  new
             Priority:  important       |                Component:  ffmpeg
              Version:  4.4.1           |               Resolution:
             Keywords:                  |               Blocked By:
             Blocking:                  |  Reproduced by developer:  0
Analyzed by developer:  0               |
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Comment (by Jeffrey Wilson):

 Additional information - if I omit IntermediateTimelineRender_0.mp4 then
 the concat works.  IntermediateTimelineRender_0.mp4 is a 10 second video
 created from an .jpg image using ffmpeg command:

 ffmpeg.exe -loop 1 -i  "image.jpg" -t 10 -vf
 scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-
 iw)/2:(oh-ih)/2,setsar=sar=1/1 -c:v libx264 -pix_fmt yuv420p
 "IntermediateTimelineRender_0.mp4"
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Ticket URL: <https://trac.ffmpeg.org/ticket/9592#comment:2>
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