[mythtv-users] DVD stuttering only in MythTV

Scott catfather at donpoo.net
Tue Jul 12 08:00:41 EDT 2005


I'm using MythTV (0.18.1-r) and  xine (xine-lib 1.0-r2 and xine-ui  
0.99.3) on my x86 Gentoo 2005.0 box to play back DVDs. I'm also using  
kernel 2.6.12-r4 and xorg-x11 6.8.2-r2 with the radeon XFree86  
driver. The output of xvinfo shows everything looks great. The window  
manager is a basic KDE 3.4.1 install.

The system hardware is a Pundit bare bones with PCI ATI 9200 (R280  
chip, onboard video disabled), SB Audigy2 ZS,, P4 2.80GHz, and 512MB  
of RAM.  Plenty of power for xine and DVD playback and normally not a  
problem. :)

The problem is when subtitles or Closed Captions are enabled that  
xine playback of the DVD seems to stutter just at the moment when the  
text appears on the screen. This happens every time new text appears  
on the screen and is most noticeable when the camera is panning  
across backgrounds or as the camera follows a group of people walking  
down a hall way. I've run xine with the bug-report option and don't  
see any error output when the problem shows up.

If I exit from MythTV and use xine from a xterm to play back the same  
DVD with subtitles or Closed Captions I don't see the problem. In  
other words, xine launched from outside of MythTV shows no stutter  
problems with the DVD playback where xine launched from within MythTV  
shows a problem with stuttering on DVDs when subtitles or Closed  
Captions are enabled. In both cases the command line for xine is  
"xine -pf --no-splash dvd://" and the xine config file is set to use  
XV for video and ASLA passthrough the SPDIF for audio.

Anyone want to take a stab at what's going on here? Does  
mythtvfrontend do something with the XV overlay that might cause this  

Scott <catfather at donpoo.net>
AIM: BlueCame1

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