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

[Gonzalo Garramuno]

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.

$ gcc --version
gcc-4.6.real (Ubuntu/Linaro 4.6.4-1ubuntu1~12.04) 4.6.4