Re: [FFmpeg-devel] FATE Errors

[Soft Works <softworkz@hotmail.com>]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of
> Andreas Rheinhardt
> Sent: Saturday, April 30, 2022 10:02 PM
> To: ffmpeg-devel@ffmpeg.org
> Subject: Re: [FFmpeg-devel] FATE Errors
> 
> James Almer:
> >
> >
> > On 4/30/2022 4:06 PM, Andreas Rheinhardt wrote:
> >> Soft Works:
> >>> Hi,
> >>>
> >>> is it a known issue that the current head of the master branch
> has
> >>> FATE errors?
> >>>
> >>> I get the same locally as well as on the automated GitHub build.
> >>> One is this:
> >>>
> >>> --- ./tests/ref/vsynth/vsynth2-mpeg2-422 2022-04-30
> >>> 14:23:44.330424058 +0000
> >>> +++ tests/data/fate/vsynth2-mpeg2-422 2022-04-30
> 14:38:41.071678201
> >>> +0000
> >>> @@ -1,4 +1,4 @@
> >>> -b2fa9b73c3547191ecc01b8163abd4e5
> >>> *tests/data/fate/vsynth2-mpeg2-422.mpeg2video
> >>> -379164 tests/data/fate/vsynth2-mpeg2-422.mpeg2video
> >>> -704f6a96f93c2409219bd48b74169041
> >>> *tests/data/fate/vsynth2-mpeg2-422.out.rawvideo
> >>> -stddev: 4.17 PSNR: 35.73 MAXDIFF: 70 bytes: 7603200/ 7603200
> >>> +8f6d565723ccf879ab2b5aa910b7ce21
> >>> *tests/data/fate/vsynth2-mpeg2-422.mpeg2video
> >>> +380544 tests/data/fate/vsynth2-mpeg2-422.mpeg2video
> >>> +0797fddea4835687dedddebbbe98fa8f
> >>> *tests/data/fate/vsynth2-mpeg2-422.out.rawvideo
> >>> +stddev: 4.16 PSNR: 35.73 MAXDIFF: 75 bytes: 7603200/ 7603200
> >>> Test vsynth2-mpeg2-422 failed. Look at
> >>> tests/data/fate/vsynth2-mpeg2-422.err for details.
> >>> make: *** [tests/Makefile:277: fate-vsynth2-mpeg2-422] Error 1
> >>>
> >>>
> >>> Is anybody seeing the same?
> >>>
> >>> Thanks,
> >>> sw
> >>
> >> http://fate.ffmpeg.org/ doesn't show recent regressions and FATE
> is fine
> >> for me locally. I recently made changes to FATE (namely the test
> >> requirements, vcodec.mak (where the vsynth-tests reside) among the
> files
> >> affected), so I am interested in whether the failing tests are
> >> concentrated on the files recently changed by me (it would
> obviously not
> >> haved pushed them if I knew them to cause issues; also patchwork
> was
> >> fine).
> >> Are these issues reproducible? Can you bisect them?
> >>
> >> - Andreas
> >
> > This may be the alignment issue introduced in lavfi in
> >
> https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=17a59a634c39b00
> a680c6ebbaea58db95594d13d
> > assuming it was not fixed.
> > I think it only affected targets where av_cpu_max_align() returned
> 64.
> 
> You are completely right: Just making av_cpu_max_align return 64
> allows
> to reproduce the issue. And it has nothing to do with my recent FATE
> patches (545e87f49dc9fa5b880e330fc4e1854df68cc0f1 would be the only
> contender for changes).
> 


I found that the FATE errors can be avoided by using

./configure --disable-avx512

Yet, I hope it will be fixed at some time..


softworkz
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