[mythtv-users] More HD stuttering
curtis at stanfordcomputing.com
Thu Dec 1 13:03:57 EST 2005
On Dec 1, 2005, at 10:53 AM, Jean Connelly wrote:
> The system is a 3.06 GHz P4 running Fedora Core 3. The video
> is a NVidia 5200FX. For capture, all I have is a HD3000. I've
> that DMA is working on all the drives. I built mythtv from stable
> source, 0.18.1. I used the following configure options:
> --enable-xvmc --enable-opengl-vsync --enable-dvb
> --dvb-path=/lib/modules/2.6.12- 1.1381_FC3smp/build/include
> --disable-firewire --disable-joystick --disable-ivtv --enable-proc-opt
> --disable-xvmc-vld --enable-opengl-vsync
> I have close to an identical system; and I have what is probably
> equivalent stuttering. HDTV (live or recorded) is totally
> unplayable in myth. I have tried with and without opengl sync. I
> can't find the xvmc option in the gui with this myth version to
> disable xvmc for testing. Recorded 1080i plays badly (with
> frequent pauses and never with audio sync) in mplayer with xvmc and
> ffmpeg12mc and plays even worse without xvmc. I'll try transcoding
> my latest sample clips to see if they are fine when played back at
> standard resolutions.
> I've got
> 3.06 GHz P4 (which is a 533Mhz FSB chip)
> 512 MB Ram
> BE7-RAID mobo
> Nvidia 5200FX
> Fedora Core 3
> Night before last's myth svn. No deinterlacing requested.
> Prebuffer pauses all over the place.
> I think what we really need is an hdtv playback test suite external
> to myth to get better benchmarks on actual system performance.
> From previous posts to the list ("well I got *my* P4 1.4Ghz system
> to playback hdtv") I think that my system *should* be able to
> playback hdtv without issue, but perhaps there are some motherboard
> weaknesses or such that make it impossible.
> Very frustrating.
HD plays well on my 2.4GHz P4/5200FX without XVMC. XVMC doesn't work
well with HD. I get stuttering with XVMC and HD. I am not using
OpenGL sync. The option for XVMC is the first screen of the TV
Settings->Playback menu (from memory...)
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