On Mon, 2005-12-19 at 15:42 -0800, Mark Johannessen wrote: > I have been able to install mythtv/mythweb sucessfully (after about a > weekend of work) on the following box: > > Intel Celeron 2.66 gHz > 768 ram > Nvidia e-GeForce MX4000 AGP card > Soundbalster audio card
> The system is hooked up to an HD antenna and the signal is fine, > channels can be selected, audio from the sound card works, mythweb > works, etc. However, when either playing live TV or playing back > recorded shows, the playback studders. It plays for a couple of > seconds, studders, and plays for another couple of seconds, and so > forth. The pattern is regular. I have plenty of HD space, using an > LVM with jsf format. There are three major causes of studder: Audio problems Underpowered systems nVidia's XvMC implementation The audio can often be addressed by turning on "Extra Audio buffering" in the frontend settings, but sometimes requires the purchase of a new audio card. A Celeron 2.66Ghz should be able to handle 1080i, if you compile specifically for it. Download the latest SVN and use: '--compile-type=release --enable-proc-opt --enable-dvb' as your ./configure options. I recommend against using XvMC with nVidia cards for HDTV unless you can't get MythTV to work without it. If you do need it, you need to enable it in ./configure, and in the frontend settings under: "Setup"->TV Settings"->"Playback"->"Preferred MPEG2 Decoder" I believe your card has IDCT acceleration, but it only has 8 decoding surfaces, which is enough for the video player which comes with the pcHDTV card, but not for MythTV. MythTV has a fancy OSD, and does captions, etc. There is some preliminary work to implement less fancy OSD in the code; search for Chromakey OSD in mythtv-dev if you want to try it out. -- Daniel
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