jerky video and audio - MythTv Player

tytus

2007-06-20, 21:46 #1

Member since Jun 2007 · 1 post · Location: Boston
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Subject: jerky video and audio

I installed mythtvplayer on 1.99GHz desktop with 768MB of RAM running WinXP. The video and audio is stops and
starts very often (specially video). So I tried installing it on a 1.8 GHz laptop with 1GB of memory (also WinXP) and everything works correctly! Both machines were connected to the backend at 100Mb. I was testing HDTV video (16:9) format. The regular format performs much better but not perfect.

The desktop has the following video card:

Name RAGE 128 PRO Ultra GL AGP (Microsoft Corporation)
PNP Device ID PCI\VEN_1002&DEV_5446&SUBSYS_04091002&REV_00\4&EC7A465&0&0008
Adapter Type RAGE128 PRO II, (AGP 4X/PCI), ATI Technologies Inc. compatible
Adapter Description RAGE 128 PRO Ultra GL AGP (Microsoft Corporation)
Adapter RAM 32.00 MB (33,554,432 bytes)

Laptop's video card:

ame ATI MOBILITY RADEON X300
PNP Device ID PCI\VEN_1002&DEV_5460&SUBSYS_20021028&REV_00\4&27EA4097&0&0008
Adapter Type ATI MOBILITY RADEON X300 (0x5460), ATI Technologies Inc. compatible
Adapter Description ATI MOBILITY RADEON X300
Adapter RAM 64.00 MB (67,108,864 bytes)

Is it possible that the desktop's video card is the problem here? Any other suggestions for improving performance?

Any help appreciated.

This post was edited on 2007-06-20, 21:56 by tytus.

Peanutious 2007-06-21, 00:59 #2

Member since Jan 2007 · 19 posts
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It sounds like your video card is likely the bottleneck. A 32MB AGB video card almost certain does not have enough RAM to deal with the high def video quickly enough. You can get a 128MB AGP card for $34 from buy.com at: http://www.buy.com/retail/Product.asp?sku=202902698

My Athlon 2500 laptop with 512MB ram and 64MB shared video memory running xp runs standard video just fine.

Mikkel (Administrator) 2007-06-21, 21:59 #3

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Member since Oct 2006 · 222 posts · Location: Copenhagen, Denmark
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I agree that it sounds like a video-card problem. A 1ghz is enough to handle SD video.

Try to inspect the log file 'log.txt'. Somewhere at the beginning it writes either "Overlay is in hardware" or "Overlay is NOT in hardware". If the overlay is not in hardware, then the videocard is definitely your problem. What is the CPU utilization?
It might help to find a never driver for the video-card or reinstall directx. Some older drivers for old graphic card does not have a lot of hardware support which makes them painfully slow.

\Mikkel