[FFmpeg-devel] [PATCH] Add a gamma flag to exr loader to avoid banding

Michael Niedermayer michaelni at gmx.at
Fri May 2 04:06:32 CEST 2014

On Thu, May 01, 2014 at 07:37:58PM -0300, Gonzalo Garramuno wrote:
> On 01/05/14 18:45, Michael Niedermayer wrote:
> >still fails fate, and the image does not look ok that its produced
> >there are individual green pixels in dark areas, so id guess
> >something is overflowing
> >
> >[...]
> >
> Can you do a distclean and a clean compile?

i already did
but just tried again, same failure

> I had the green areas
> showing bad in a previous patch because of not checking the values
> that go into the powf function.  However, the latest patch does
> check both in the float path and in the table path and I get a clean
> image on my end. And the fate checksums work for me and Carl.

float computations can differ in result between platforms, rounding
can differ, compiler optimizations can differ
i dont know if its either of these though thats causing the issue

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Many things microsoft did are stupid, but not doing something just because
microsoft did it is even more stupid. If everything ms did were stupid they
would be bankrupt already.
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