[FFmpeg-devel] H.264 Lossless Decoding Patch (Profile 244) for 8x8 Intra Prediction

[Reimar Döffinger]

On Wed, Mar 05, 2014 at 08:15:50PM +0100, Hendrik Leppkes wrote:
> On Wed, Mar 5, 2014 at 8:14 PM, Reimar Döffinger
> <Reimar.Doeffinger at gmx.de> wrote:
> > On 05.03.2014, at 20:05, Jason Garrett-Glaser <darkshikari at gmail.com> wrote:
> >> This will break decoding on all x264-encoded lossless files (the vast
> >> majority of lossless files) produced in the past half decade or so.
> >
> > Any chance of auto-detecting this? (reliably?)
> > Either way I guess it should be configured by a bug workaround flag as we do for other codecs.
> 
> The decoder already parses the x264 version string and sets
> H264Context->x264_build. Could make it switch implementation based on
> that. That is assuming the person encoding didn't go out of their way
> to purge this information.

We can add an option to also force it, but in general I expect
autodetection based on x264_build should be good enough.
IMHO it will at least be better than not matching reference decoder.