DVD Playback choppy after ~40 minutes
#1
Hi all, I am having a problem playing DVDs in XBMC on Ubuntu 10.10 (64-bit).

For the first ~40 minutes of playback everything is fine, however suddenly the video starts playing back at 15fps (instead of 25fps) and the picture is quite choppy/stuttery. Audio plays back just fine. Once this has happened the only way to fix the problem is to reboot.

This is an ION system with 4GB of RAM running off a 128GB SSD (and a 2TB drive for data). VDPAU seems to be working fine, 1080p content plays flawlessly AFAICT.

I have a debug log here: http://pastebin.com/Hzt32qc7

The choppiness starts at about 18:55, but nothing in the logfile seems to indicate a problem.

Does anyone have any ideas/suggestions?
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#2
Hm, now it is happening on MythTV content as well. Same symptoms; works fine for a while and then starts getting choppy. h264 content is fine, maybe there is a problem with MPEG?
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#3
In case anyone is curious, or suffers from a similar problem, I eventually "solved" this by switching to the 32-bit version of Ubuntu 10.10. I have no idea why the 64-bit version didn't work, but there you go.
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#4
Hmmm.-.. i do see a this:
Code:
17:57:00 T:140087575926528 M:2955231232   ERROR: ffmpeg[AE335700]: [ac3] incomplete frame
17:57:00 T:140087575926528 M:2955231232   ERROR: ffmpeg[AE335700]: [ac3] frame sync error
17:57:00 T:140087575926528 M:2955231232   ERROR: CDVDPlayerAudio::DecodeFrame - Decode Error. Skipping audio packet
17:57:00 T:140087575926528 M:2955231232   DEBUG: CDVDPlayerAudio::Process - Decode Error
17:57:01 T:140087575926528 M:2955116544   DEBUG: CDVDPlayerAudio:: Discontinuity - was:14570596.835307, should be:14598838.646632, error:28241.811325

Code:
17:57:18 T:140087575926528 M:2952220672   ERROR: ffmpeg[AE335700]: [ac3] incomplete frame

Code:
17:57:19 T:140087575926528 M:2954682368   ERROR: ffmpeg[AE335700]: [ac3] incomplete frame
17:57:19 T:140087575926528 M:2954682368   ERROR: ffmpeg[AE335700]: [ac3] frame sync error
17:57:19 T:140087575926528 M:2954682368   ERROR: CDVDPlayerAudio::DecodeFrame - Decode Error. Skipping audio packet
17:57:19 T:140087575926528 M:2954682368   DEBUG: CDVDPlayerAudio::Process - Decode Error

This pattern goes again trough out the log file...
And it goes on. So i would not say that debug log doesn't show anything but
im no expert.

Do you use upscaling on sd content ? Any special settings in video settings or have you tweaked advancedconfig.xml ?

I would just try to download a live cd and boot from that. This way it's fast to rule out any settings/config problems on your side. If it works with live cd something is wrong on your setup.

I play dvd's jsut fine Wink
PointOfView Nvidia ION Atom 330 - TRANSCEND 2GB DDR2 DIMM 800MHz - G.SKILL 64GB SSD 2.5
Open Elec Beta4 1.95.4
XBMC Online Manual - HOW-TO post about a problem in a useful manner - Create/View Bug Report
Setup/Fix correct resolution on XBMC/Ubuntu - Usefull linux terminal commands
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DVD Playback choppy after ~40 minutes00