[FFmpeg-user] prores4444 to dpx: colourshift & translation

[Paul B Mahol]

On 2/21/13, Mark Himsley <mark.himsley at gmail.com> wrote:
> On 20 Feb 2013 20:00, "ArnoB" <ffmpeg at rgbaz.eu> wrote:
>>
>> Hello!
>>
>> I'm trying to convert a prores4444 quicktime with gamma 2.2 to
>> a dpx sequence with the following command:
>>
>> % ffmpeg -i prores4444g2.2_v01.mov prores.%02d.dpx
>>
>> In the resulting DPX sequence I have the following errors:
>> -the DPXs are tagged as being sRGB. manually switching my program's
>> reader to 2.2 makes them look ok;
>>
>> -there is a colourshift of around 120DEG. My prores file contains a
> colourwheel
>> so it's easy to spot. green becomes blue, red becomes green and blue
>> becomes red;
> -also there's a translation in the X  of +277 pixels. the missing part
>> is wrapped around and visible on the other side:
>
> What you're saying is that FFmpeg says it's outputting rgb but other
> software is interpreting it as bgr.
>
> Have you tried asking FFmpeg for a bgr format?
>

That is first info. Looking at code both encoder and decoder support
only rgb (no bgr at all).

>
> --
>
> Mark
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