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

Michael Niedermayer michaelni at gmx.at
Mon May 5 17:28:27 CEST 2014

On Mon, May 05, 2014 at 10:37:43AM -0300, Gonzalo Garramuno wrote:
> On 04/05/14 22:53, Michael Niedermayer wrote:
> >On Sun, May 04, 2014 at 09:16:50PM -0300, Gonzalo Garramuno wrote:
> >>On 03/05/14 23:45, Michael Niedermayer wrote:
> >>>On Sat, May 03, 2014 at 05:22:15PM -0300, Gonzalo Garramuno wrote:
> >>>>On 02/05/14 19:54, Michael Niedermayer wrote:
> >>>>>still fails
> >>>>>both on x86_64 as well as arm32, it also fails differently on both
> >>>>>gamma_table differs between the 2
> >>>>>first difference is at index 256, where one is 0 and the other 1
> >>>>>last difference is at index 1023
> >>>>I reverted to the previous patch that kept the negative values and I
> >>>>am attaching it again without any changes.
> >>>>However, I am puzzled it fails on x86_64 as that's exactly the
> >>>>architecture I am developing on.  Are you trying it on Windows or
> >>>>FreeBSD?  I am running it on Ubuntu without problems on gcc4.7.
> >>>ubuntu gcc 4.6.3
> >>>
> >>Is there an easy way to set the compiler for ffmpeg?  I tried export
> >>CC=gcc-4.6 before configure and that did not work.
> >>I found out I have almost the same offending compiler (4.6.4) and
> >>wanted to see if I could reproduce fate failing.
> >./configure --cc='mycompiler'
> >
> >[...]
> >
> No luck.  I did a distclean and a compile with gcc-4.6.4 and the
> fate tests passed.

it seems to fail only with --enable-libopencv

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Everything should be made as simple as possible, but not simpler.
-- Albert Einstein
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