On Fri, Aug 10, 2018 at 09:05:42AM +0200, Paul B Mahol wrote: > On 2/20/18, Michael Niedermayer <mich...@niedermayer.cc> wrote: > > On Sat, Feb 17, 2018 at 10:25:10PM +0100, Michael Niedermayer wrote: > >> Fixes: Timeout > >> Fixes: 5796/clusterfuzz-testcase-minimized-5206729085157376 > >> > >> Does someone have a valid sample that triggers this path ? > >> > >> Found-by: continuous fuzzing process > >> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > >> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > >> --- > >> libavcodec/dxtory.c | 6 +----- > >> 1 file changed, 1 insertion(+), 5 deletions(-) > > > > will apply > > > > [...] > > -- > > Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB > > > > Complexity theory is the science of finding the exact solution to an > > approximation. Benchmarking OTOH is finding an approximation of the exact > > > > This change breaks this sample: http://0x0.st/s4Ot.avi > > Please revert ASAP.
Can you explain how it breaks this sample ? if i look at the images from: make -j12 && ./ffmpeg -ss 1 -i s4Ot.avi -vf eq=1:0.5 test-git%d.png teh first image to differ is test-*7.png if i load it and the reverted in gimp as layers its easy vissible that one has been vertically scaled to 1024 while the other is not. Which is kind of expected. the image contains nothing but a circle and a dot in the middle if i now take the paintbrush tool and set its size to 132 then its easy to see when hovering over the circle that the one from git is round while the one from the change reverted is not round it is round in the other images (looked at image5) So i presume that the correct height is 1024 and not 1004 as the code in case of a revert would make it. Do you see some artifacts that are in the git version which are not in the reverted one ? Feel free to revert of course, if you think that theres a major issue that this fixes. Iam not reverting as i failed to reproduce an issue except the printed messages asking for a sample Thanks -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Concerning the gods, I have no means of knowing whether they exist or not or of what sort they may be, because of the obscurity of the subject, and the brevity of human life -- Protagoras
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