[FFmpeg-trac] #1273(avformat:new): initial seek causes failure to display on some avi files

[FFmpeg]

#1273: initial seek causes failure to display on some avi files
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             Reporter:  DonMoir      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by DonMoir):

 I tried ffmpeg -ss 0 clock.avi temp.avi and temp.avi was displayable.

 ffmpeg -ss 1 clock.avi temp2.avi and temp2.avi had no display.

 When I do a Seek to zero seconds (or any time) in my own app on startup, I
 don't get any display. It appears all processing is normal and I get
 finished frames etc, but it appears they are all black. If I do a seek
 after at least one frame has been processed, seek at any time works fine.
 Similiar to behavior seen with ffplay. Although ffplay has a problem
 displaying the clock.avi without -ss. The image is skewed. This doesn't
 have anything to do with the seek problem and the skew problem with ffplay
 may be a regression.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1273#comment:3>
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