[FFmpeg-trac] #5527(avfilter:open): Delogo crash with x=0 and/or y=0
FFmpeg
trac at avcodec.org
Tue May 10 13:53:53 CEST 2016
#5527: Delogo crash with x=0 and/or y=0
-------------------------------------+-------------------------------------
Reporter: easyfab | Owner: khali
Type: defect | Status: open
Priority: important | Component: avfilter
Version: git-master | Resolution:
Keywords: delogo | Blocked By:
crash fpe regression | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 0 |
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Comment (by khali):
This isn't really a regression, given that you can get the exact same
crash by passing option band=1 to the old code. Just like you can avoid
the crash with the new code by passing option band=4. Simply the change in
default made the bug more visible.
Additionally, even if you manage to avoid the crash, x=0 and/or y=0 will
never give good results as the filter needs samples all around the logo
area for interpolation.
Incidentally I wrote a patch to catch exactly this problem many months
ago. No idea why I did not push it... I'll attach it shortly, please
review and/or test.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5527#comment:12>
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