The problem I've seen on my system are : - Use Video as Time Base (experimental). For some reason mine was checked and sometime it would work just fine. Disabling that solved my problem. - Not using Alsa drivers, every time a new kernel gets out you have to go get the alsa driver, pain that it doesn't upgrade on it's own. - Ring Buffer Size is a problem when too high on my backend, looks like every few seconds my frontend would have to wait for I/O from the backend and pause frames for a few milliseconds. When you check with "top" and you see "wa" using CPU time, that's a problem. - My 100$ PC from fry's (Duron 1600) with PCI MX4400 is enough to play 1080i HD.
Steve M. On 1/15/06, Jerry Rubinow <[EMAIL PROTECTED]> wrote: > On 1/7/06, Jerry Rubinow <[EMAIL PROTECTED]> wrote: > > > > On 1/6/06, Steve Adeff <[EMAIL PROTECTED]> wrote: > > > On Friday 06 January 2006 00:05, Jerry Rubinow wrote: > > > > On 1/5/06, Jerry Rubinow < [EMAIL PROTECTED]> wrote: > > > > > On 1/5/06, Joseph A. Caputo <[EMAIL PROTECTED]> wrote: > > > > > > On Thursday 05 January 2006 1:21, Jerry Rubinow wrote: > > > > > > > When using XvMC to play back video, CPU usage is low (30% for HD, > > 10% > > > > > > > for SD), but the video plays back slower than realtime. I'm using > > an > > > > > > > Nvidia 5200 card, with driver version 7667 (although I've tried > > every > > > > > > > version up to the current 8XXX). > > > > > > > > > > > > > > Is there anything I should check? Anything obviously wrong from > > the > > > > > > > following details? Or is this the XvMC slowdown I've read about? > > > > > > > What are my options for fixing this? > > > > > > > > > > > > I could be way off base on this, but something in my memory is > > nagging > > > > > > me... something about maybe Nvidia's XvMC not supporting/performing > > > > > > well at certain resolutions? Have you tried changing your > > horizontal > > > > > > resolution to something smaller, like 1024? > > > > > > > > > > No, but that's a good suggestion - I'll try it tonight. Thanks. > > > > > > > > No luck. I tried setting both X and the GUI setup in myth to 800x600 > > > > and it's still slow playing HD. Not stuttering, just slower than real > > > > time. I didn't mention before, but I'm using pretty much a straight > > > > following of Jarod's guide with FC4, 2.6.14, on a P4 2.8. > > > > > > > > I'm so close to having beautiful HD playback, can anybody suggest things > > to > > > > try? > > > > > > poney up for a faster processor? I know its prbly not an optioin, but with > > a > > > 3.0 or 3.2GHz cpu you'll be able to play back HD without XvMC. > > > Does OpenGL sync work with XvMC? I dunno, but might be worth a try. Also, > > try > > > disabling any deinterlacing? Oh, what about audio buffering options, have > > you > > > played with those? > > > Also, don't forget you have to restart mythfrontend everytime you make one > > of > > > these changes. minor bug... > > > > > > I'm already at the fastest processor a Pundit will accept, so I'd have to > > scrap my whole nice form factor frontend to do that. I'm using OpenGL sync, > > and deinterlacing is already disabled. I haven't played with audio options > > at all, but I don't think that can be it, since if I turn off XvMC, NTSC > > plays back fine, but with it on, it plays back slow (not stuttering, just > > slow-mo). > > I'm out of town this weekend, but when I get back, I'm going to try > > compiling mplayer with xvmc support and see if that has problems playing > > back too. That will at least either eliminate myth from the equation or > > point to myth as the culprit. > > For anybody following this thread, increasing the ringbuffer size was > what finally fixed this problem. > > -Jerry > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
