[MPlayer-users] lowres and h264

[Reimar Döffinger]

Hello,
On Sun, Aug 05, 2007 at 01:50:05PM +0200, Nico Sabbi wrote:
> Carl Eugen Hoyos wrote:
> > Sean Zimmermann <svz90 <at> pipeline.com> writes:
> >>I then tried using lavdopts lowres=1. The file played at the correctly without
> >>any speed problems and took up considerably less cpu power. However, mplayer
> >>was only playing the upper-left corner of the video (instead of scaling the
> >>movie down, it cropped it). Is this normal, something I incorrectly configured,
> >>or a bug? I tried the lowres option with a normal divx/avi file and it scaled
> >>the file down correctly. I am using MPlayer 1.0rc1-4.1.3-DFSG-free on a system
> >>running Debian testing on ppc.
> > 
> > 
> > Apart from "Always test latest svn":
> > Yes, that's the way lowres=1 works for h264.
> 
> this means that lowres doesn't work with H264, that is no news
> (I remember reading in a changelog that lowres works only with certain
> H264 streams)

But I also thought that in that case the full video is still decoded. So
maybe the vo is the bottleneck? Maybe try -vf scale=640:-2 -sws 4?

Greetings,
Reimar Döffinger