[FFmpeg-devel] [PATCH] fate: add vf_overlay test for main source with alpha channel

[Tobias Rapp]

On 20.07.2017 17:06, Peter Große wrote:
> On Wed, 19 Jul 2017 21:00:49 +0200
> Peter Große <pegro at friiks.de> wrote:
>
>> I was able to reproduce your checksums only after removing
>>
>>   --disable-optimizations --disable-mmx --disable-stripping
>>
>> from my configure command. I thought optimizations should have no
>> impact on the result?!
>
> After some further tests, it seems swscale (used as the auto_scaler in the
> test) produces slightly different output depending on whether MMX is enabled or
> not.
>
> When I re-add --disable-optimizations --enable-mmx --disable-stripping to my
> configure command line, the test succeeds.
>
> Any further comments to the patch and test case?

Maybe try adding -sws_flags +accurate_rnd+bitexact to CMD?

Regards,
Tobias