Thanks for the info. I'm outputing to a normal TV-out (composite). I'm not sure what modeline to specify for that?!? Isn't the refresh rate of the NTSC signal fixed? What does changing the modeling do in that case?!?<br>
<br>--<br>Mike<br><br><div><span class="gmail_quote">On 11/29/06, <b class="gmail_sendername">Alex Halovanic</b> <<a href="mailto:halovanic@gmail.com">halovanic@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Just posting this, hoping it will help someone else :)<br>I was having lots of problems with XvMC playback of HD streams from my<br>HDHomerun, with prebuffering pauses causing skips in sound and<br>messages that the video was 4 or 5 frames ahead of the audio ever few
<br>seconds. After trying every possible combination of settings possible<br>(and realizing that the problem also existed in Xine), I think I've<br>finally found the real solution. I had been using a modeline with a<br>
vertical refresh of 59.94 hz in an attempt to keep it as close to the<br>framerate of the videos and official specs. Increasing this to about<br>60.92 hz (That's a dotclock of 74.9 for my 720p modeline) has gotten<br>rid of nearly all of the pauses. There's still some prebuffering for
<br>a few seconds after the channel is tuned, and when the program<br>changes, especially when one commercial changes to another, but then<br>it will "settle down" for the program, even when skipping about in it.
<br> Sometimes there are a couple of messages that the video is now ahead<br>of the audio, but these too go away within a few seconds. Total cpu<br>usage for my wimpy little machine: 50-60%!<br>Note: I take no responsibility if you try this and the higher refresh
<br>rate causes your tv to burst into flames<br><br>My set-up:<br>1.6 ghz Duron KM400, 512 mb RAM<br>Geforce 5200 FX, vga thru component converter at 720p to cheap Walmart Sanyo CRT<br>Nvidia binary driver 1.0-9625<br>Modeline "720p"
74.9 1144 1320 1376 1650 696 722 728 750 +hsync +vsync<br>(actually 1144x696, adjusted for overscan)<br>Myth SVN 11828 compiled for athlon-xp<br>audio output device-ALSA:default, deinterlace Bob2x, Use Realtime<br>Priority Threads, Extra Audio Buffering, UseChromaKeyOSD,
<br>UseXvMCForHDOnly<br>_______________________________________________<br>mythtv-users mailing list<br><a href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a><br><a href="http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users">
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users</a><br></blockquote></div><br>