On Friday 29 July 2005 07:47, Joe Votour wrote: > Are you using the new Xv driver for ivtv? > > If not, then the problem is that the CPU is doing all > of the decoding and scaling, and thus, frame drops are > expected. Xv, which is common on most video cards, > and in experimental state for the PVR-350 offloads the > scaling to the video card, which reduces CPU load, and > helps prevent the dropped frames. > > (Note: I used to use a PVR-350 for video output, but > now use a GeForce 5200FX. Once the Xv driver for ivtv > matures a bit, I might give it a shot).
Perhaps what i have been asking for ages about jerky pictures is what is being called dropped frames here. I've been thinking it might be an encoding issue and that I needed a hardware encoder even though I have a celeron 2ghz. But now I realise that I get dropped frames (a tiny pause of much less than a second every 10 - 15 seconds). I'm also seeing 50% CPU usage. I'm trying to out put through an nvidia 5200 (from XFX and with not-working video-in). I have not the faintest idea whether i am using the xv or xvmc or ... driver because I don't know how to check. But I am using a basic Mandrake 10.2 system albeit with a multimedia kernel (which enables real time threads and has helped a little but not enough) and pre-compiled mythtv from thac. What should I check and change in the kernel (hopefully nothing), mythtv (no problem to recompile if i know the flags), the nvidia (or nv) drivers, xine, mplayer,.... Sim _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
