<html><P>I don't know if this will help, but here goes...</P>
<P>I have DVB-T running on a Abit IC7-G, P4 2.4C, 512Mhz Ram, 120Gb IDE HD - not a slow system by any means. When I added a SATA HD, the picture started to break up (continuous errors in the DVB TS stream). The CPU usage was at 10% so that wasn't the problem.</P>
<P>After a lot of prodding, I fixed it by disabling the onboard sound (I have an M-Audio Rev 7.1) and the onboard firewire. I don't know the exact problem that it fixed, but it's been working fine ever since, now with 3 SATA drives. If anyone knows, I'd like to know.</P>
<P>Paul<BR><BR>>-----Original Message-----<BR>>From: Bodo Bauer [mailto:bb@bb-zone.com]<BR>>Sent: Friday, December 31, 2004 11:53 AM<BR>>To: 'Discussion about mythtv'<BR>>Subject: [mythtv-users] prebuffering pause<BR>><BR>>Hi, <BR>> <BR>>I build myself a mythtv based VCR and am struggling with small skips <BR>>inplayback (both LiveTV and Recordings). <BR>> <BR>>Hardware: <BR>> <BR>> * Shuttle ST62K Barebone / 512MB RAM / Celeron 2.4GHz <BR>> * Terratec Cinergy 400TV <BR>> * SEAGATE ST3160023A - 160GB <BR>> <BR>>(see also http://www.bb-zone.com/misc/LinuxPVR/ for a more detailed <BR>>writeup on my little project). <BR>> <BR>>I tried all the hints I found. I changed the resolution, the MPEG4 <BR>>bitrate, sync on video, etc. nothing really helped. <BR>> <BR>>System load is arounf 40%,with peaks at 90%. I couldn't make out any <BR>>connection between the load peaks and the skips in the stream though. <BR>> <BR>>Starting the forntend with '-v playback,libav' I see this leading to the <BR>>pause: <BR>> <BR>>2004-12-31 00:23:12 A/V diverged by -13.0982 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by -12.1487 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by -11.1865 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by -10.2211 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by -9.24708 frames, dropping frame to <BR>>keep audio in sync <BR>>'video_output' mean = '33336.56', std. dev. = '20322.25', fps = '30.00' <BR>>avsync_delay: -253, avsync_avg: -369, warpfactor: 0.979771, <BR>>warpfactor_avg: 0.998735 <BR>>2004-12-31 00:23:12 A/V diverged by -8.2728 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by -7.29835 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by -6.3175 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by -5.33813 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 prebuffering pause <BR>>2004-12-31 00:23:12 waiting for prebuffer... <BR>>2004-12-31 00:23:12 prebuffer wait timed out.. <BR>>2004-12-31 00:23:12 waiting for prebuffer... <BR>>2004-12-31 00:23:12 A/V diverged by -4.35358 frames, dropping frame to <BR>>keep audio in sync <BR>>2004-12-31 00:23:12 A/V diverged by 3.625 frames, extending frame to <BR>>keep audio in sync <BR>> <BR>> <BR>>Any hints welcome! <BR>> <BR>>BB <BR>></P>