[MPlayer-dev-eng] [PATCH] (not for CVS submission) opaque subtitles

[D Richard Felker III]

On Tue, Jan 28, 2003 at 10:14:15AM +0100, Pierre Lombard wrote:
> Hi,
> 
> Here are 2 dirty hacks to have opaque gray subtitles when watching sthg
> with vo xv and encoding (in YV12 color space) with subtitles.
> 
> They set the U+V channels to 128 if the alpha channel is below a
> threshold.

The problem is that U/V planes are normally sampled at half
resolution, so 4 Y pixels correspond to 1 U and V pixel. The correct
way to handle OSD is to render half-size elements for U/V as well and
display them separately. Unfortunately you also need to handle the
cases where you start at a halfpixel boundary...

In any case, your patch might be desirable in the mean time. Anyone
else have comments??

Rich