I also see the stuttering but only when the MPEG coder is running simultaneously.
Without the coder running, DVD playback via Xv is perfect but unfortunately with it running, playback is unwatchable. IIRC, John Harvey thought he knew what was causing this back in October last year but I don't think he's had time to work on it since... Regards, Wilf. On 25/02/06, bbee <[EMAIL PROTECTED]> wrote: > Hi all, > > I recently bumped my PVR350 box from a old 0.1.9 ivtv / old 2.6 kernel to > the 0.4.2 release and 2.6.14 kernel (gentoo hardened-sources, fwiw). Also > now using the 0.10.6 xdriver. > > After some fudging the non-xvideo ivtv stuff works as perfectly as the old > release, but I'm having trouble getting smooth playback using the xv > output. > The symptom is a "stuttering" of the video feed; every 1~2 seconds > (the interval does not change, regardless of motion) the video seems to > pause for a few frames before resuming. From what I can observe no frames > are dropped, it is just a short (but very annoying) periodic playback > pause. > This is on a PAL board using mplayer dev-CVS-060217 (from gentoo portage) > on a Epia V8000 board (800 MHz). The CPU never goes above 50% and mplayer > does not complain about my system being too slow. > > The last mention of issues like this that I can find is this thread: > http://www.gossamer-threads.com/lists/ivtv/devel/23811 > >From September '05. Now I've tried the suggestions in the thread > (increasing YUV buffers), I've tried most other patches that seemed > promising from the lists, I've tried recompiling the xdriver with > optimizations, I've tried eliminating any audio issues (-ao null), I've > tried about 30 different video files of differing resolutions and > encodings. I've tried all I can think of. The problem persists. > > The reason I call this a drama is that, apart from the stuttering, the > video output is the most drop-dead gorgeous TVout I have ever seen. I swear > if I ripped a DVD to CD size, downsampling the resolution, the rip played > through xv would look better than if I played the DVD on my standalone. > > Using the X11 output (-vo x11) gives the old familiar tearing when a lot of > the frame changes, as well as unscaled output, and slightly higher CPU > usage. But no stutter. I believe the cause is somewhere in the IVTV yuv > playback code. > > Now, I'd been waiting for a major mythtv release to upgrade this system. I > was hoping ivtv would be able to facilitate smooth video playback by then. > Not to diminish all the hard work by the developers, but is there anything > I can do to make this happen? If not, is there atleast any notion of what > the problem is / the timeframe to resolve it? (Are all the devs busy > merging with DVB / mainline kernel?) > Or should I just give up and switch to the EPIA's builtin, exceedingly > crappy, but accelerated and non-stuttering Trident Cryberblade/il TVout? > > Thanks, > > bbee > > _______________________________________________ > ivtv-devel mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-devel > -- [EMAIL PROTECTED] | MythTV blog: http://mezzanines.blogspot.com/ _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
