[MPlayer-dev-eng] "Stitching" Artifact

[Michael Niedermayer]

Hi

On Sunday 27 January 2002 04:00, Mike Melanson wrote:
> Hi team,
> 	I'm still trying to perfect the SMC codec. Fortunately, I have
> some more sample media than before so I can test some more cases. I'm
> having a strange bug that I've affectionately termed the stitching
> artifact. Sometimes on vertical or horizontal lines in an image, there
> appear to be a bunch of evenly-spaced stitches. It's hard to write
> this off as a codec bug, though, because it only happens with the x11
> target; when I write the frames to PNG files, the stitches don't appear.
>
> 	Is there something about the x11 vo target that I should know
> about with regard to these artifacts?
dithering yuv->bgr15 & bgr16 (assuming that thing outputs yv12 and u use 
bgr16/15 ...)
it results in (very) faint stitching-artifacts(tm)
u could try to outcomment #define DITHER1XBPP from postproc/yuv2rgb.c

[...]

Michael