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<DIV><FONT face=Arial size=2>Probably along the right line.</FONT></DIV>
<DIV><FONT face=Arial size=2>I had a similar performance problem that was due to
the system using software based sound</FONT></DIV>
<DIV><FONT face=Arial size=2>rather that the hardware based sound. Check that
your sound system is doing the right thing</FONT></DIV>
<DIV><FONT face=Arial size=2>by playing some music (cd etc) and watching the CPU
percentage.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Mike Choy</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=paul_woodward@fastnet.co.uk
href="mailto:paul_woodward@fastnet.co.uk">Paul Woodward</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=mythtv-users@mythtv.org
href="mailto:mythtv-users@mythtv.org">Discussion about mythtv</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, December 31, 2004 12:34
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [mythtv-users] prebuffering
pause</DIV>
<DIV><BR></DIV>
<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>
<P>
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