[MPlayer-dev-eng] Re: [PATCH] vo_xvmc - bob deinterlacing

[Carl Eugen Hoyos]

Ivan Kalvachev <ikalvachev <at> gmail.com> writes:

> Now I am really surprised that the bob without timing worked. There
> are 2 explanations for it:
> 1. fields are switched on retrace so the first filed is actually shown.
> This however could nearly-work with monitor framerates close to the
> video field rate (aka mpeg2 30fps -> monitor 60Hz). With higher
> refresh rates the difference between both fields would become more
> visible. (BTW notice that by default XFree/Xorg doesn't provide modes
> bigger than 85Hz, that's not so far away from 60);

I tried bobdeint on interlaced content (live news on Austrian television,
25 fps) with the following resolutions and refresh rates (GeForce4 MX,
Nokia 445Xpro):
1600x1200 88Hz
1280x1024 58Hz
1280x1024 108Hz
768x576 58Hz
768x576 138Hz

All resolutions look much better with -vo xvmc:bobdeint than without
deinterlacing, the higher the refresh rate, the better.

> 2. When 2 fields commands are shown one after another, the last one is
> in effect. That would be equivalent of skipping one fields.

When using -vf field=0, the result looks totally different (much worse),
so I also doubt that.

Can anybody else confirm that this patch works well for interlaced content?

Greetings, Carl Eugen