[FFmpeg-user] ffvhuff mkv playback issues and odd coloured artefacts

[Andy Furniss]

Andy Furniss wrote:
> but keeping rgb is the only truly lossless way and this seems to be
> what I get with x11 grab by default.

I should have written -

this seems to be what I get with x11 grab -vcodec ffvhuff by default

Using codecs that don't handle rgb at all or by default will of course
cause a conversion to take place.