[MPlayer-users] Comparison of different deinterlace and denoise filters

[Matthias Wieser]

Am Donnerstag, 16. Oktober 2003 20:12 schrieb D Richard Felker III:
> > So is it right to say: If you have a bttv card, you have to record tv
> > with "mencoder -tv outfmt=yuy2 -vf il=d:d,scale,format=yv12,il=i:i",
> > but if you have a saa7134 card, you only need "mencoder -tv
> > outfmt=yuy2"?
>
> No. All mpeg type codecs are 4:2:0 (aka yv12), so you must downsample
> to 4:2:0 before encoding.

OK

> If you don't do it manually, then vf_scale
> will get loaded automatically for format conversion, and it will
> butcher the chroma planes (by blending the two fields).

That may be the case with a bttv card.
But I see _no_ chroma errors when I record only with outfmt=yuy2.
Maybe thats because of the saa7134 driver.

> The only way to get around having to use
> il=d:d,scale=format=vy12,il=i:i is if your card can natively capture
> proper 4:2:0 video. (Unless you just want to capture at half-height to
> begin with...)

Which cards can do that? 


Matthias