RV24 to YUV chroma conversion uses wrong chroma in swscale

At least in some cases, RV24 -> YUV uses the wrong avcodec chroma value (RGB24 instead of BGR24). VLC->ffmpeg chroma conversion should take the i_{r,g,b}mask values into account.

Fixed in 6e8bbe8e for v4l and aa98c569 for v4l2.

added Status::fixed label

closed