[FFmpeg-user] Creating ffv1 full-range and broadcast-range files

[Robert Krüger]

On Fri, May 9, 2014 at 4:30 PM, Robert Krüger <krueger at lesspain.de> wrote:
> On Fri, May 9, 2014 at 3:24 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
>> Robert Krüger <krueger <at> lesspain.de> writes:
>>
>>> > Did you test what happens if you replace all occurrences of
>>> > AV_PIX_FMT_YUV420P in libavcodec/ffv1enc.c and libavcodec/ffv1dec.c
>>> > with AV_PIX_FMT_YUVJ420P ?
>>>
>>> I just tried and the resulting file checked with the histogram
>>> filter appears to have the correct (full-range) levels.
>>
>> The more important question is if the output is bit-exact?
>
> I checked a more complex yuvj420p sample and the framemd5 output is
> identical, so I would say yes.

would you say, submitting a patch that just adds this pixel format
instead of replacing AV_PIX_FMT_YUV420P makes sense? The risk here is
only that I would probably not be qualified to deal with problems that
require a deeper understanding of what is going on there but so far it
looks like it could "just work".