On Wed, 20 Sep 2017 19:01:52 -0700 Jorge Ramirez-Ortiz <jorge.ramirez-or...@linaro.org> wrote:
> > Btw. I noticed that this apparently never sets chroma_location? > > I didnt find anything in v4l2 to retrieve the chroma_location from the kernel > driver (the API doesnt handle this information). > does ffmpeg need this field and if so, can it be retrieved from somewhere > else > (bitstream perhaps)? Yes, chroma location matters. Some users notice if the location is incorrect. It can be retrieved from the bitstream, but that would require you to parse it. Which probably would require additional code. (You can't rely on the pre-filled parameters by libavformat, because an API user doesn't have to use libavformat.) I suggest you make the kernel devs add this parameter. There might be more such missing parameters, I noticed this one only by chance. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
