[FFmpeg-trac] #10536(avformat:closed): writing .avi files via custom IO context (AVIOContext) yields incomplete header

[FFmpeg]

#10536: writing .avi files via custom IO context (AVIOContext) yields incomplete
header
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             Reporter:  Gustav      |                    Owner:  (none)
                 Type:  defect      |                   Status:  closed
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:  invalid
             Keywords:  avi         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by Gustav):

 Thank you so much for the answer! I have just verified that adding a seek
 function makes the resulting .avi file written via the custom I/O
 complete.
 Knowing what the solution is, it makes perfect sense that a seekable
 output is a requirement for the way the AVI muxer works. Unfortunately I
 hadn't come across that information before and the documentation on custom
 I/O is quite scarce, so thanks for the tip.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10536#comment:3>
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