mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2026-10-24 02:09:03 +03:00
f7bbcb91b7
get_dc() divides the accumulated, OBMC-weighted DC by aa, the sum of the
squared OBMC weights taken over the in-plane pixels. When an OBMC block
falls entirely outside the plane - e.g. a tiny chroma plane after mcdeint
splits a frame into fields - no pixel contributes, aa stays 0 and the
ROUNDED_DIV() divides by zero (SIGFPE). ab is 0 in exactly the same case,
so the result degenerates to 0; return it directly.
Reproducible with the GPL mcdeint filter in slow/extra_slow mode, e.g.
ffmpeg -f lavfi -i testsrc=s=128x2 -vf mcdeint=mode=slow -f null -
Add a self-contained lavfi-based FATE regression test for the slow mode,
which previously crashed and is therefore not covered by the existing
sample-based fast/medium tests.
Fixes trac ticket #7779.
Signed-off-by: Bogdan Lisman <bogdan@pydevsolutions.com>
(cherry picked from commit a62d996927)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>