[vdr] New Video Decode and Presentation API from NVidia

Artem Makhutov artem at makhutov.org
Mon Nov 24 18:49:36 CET 2008


Hi,

On Mon, Nov 24, 2008 at 08:43:14AM -0800, VDR User wrote:
> On Mon, Nov 24, 2008 at 8:05 AM, Niels Wagenaar <n.wagenaar at xs4all.nl> wrote:
> > Only, in the US most of the HDTV transports don't use H264. At least, I
> > heard from several people that it's HDTV through MPEG2. Over here (Europe)
> > it's mostly HDTV through H264 (only a very small number of MPEG2 HDTV
> > channels over here).
> 
> You've been given bad information.  There are _some_ HDTV channels
> broadcast in mpeg2 but most are h264.
> 
> > Currently I need to use a Core 2 Quad (Q6600 @ 2.40GHz) to get decent and
> > stutter-free H264 decoding using software (FFMpeg SVN, Xine-lib 1.2,
> > Xine-UI and vdr-xine plugin). With my Core 2 Duo (E7300 @ 2.53Ghz) I
> > didn't had enough juice (stuttering, framedrops, etc).
> 
> You absolutely do not need a quad-core CPU and your Core 2 Duo should
> easily handle h264 decoding.  I'd say something was misconfigured or
> so.
> 
> Btw, I use CoreAVC here and the cpu usage doesn't go above about 87%
> on that x2 4400.  The h264 implimentation in ffmpeg was very unstable
> when I tried it although I heard it's gotten much better.

And what resolution?

720p ?

I have no problems in decoding 720p, but 1080i is a bit more difficult to decode.
I have also tried out CoreAVC, but ffmpeg worked better for me.

Regards, Artem



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