How to turn off Video Acceleration programmatically

Question

I'm using the Windows Media Player OCX in a program runned on hundreds of computers (dedicated).

I have found out that when video acceleration is turned on to "full", on some computers it will cause the video to fail to play correct, with green squares between movies and so on. Turn the acceleration to "None" and everything is fine.

This program is runned on ~800 computers that will autoupdate my program. So I want to add to the startup to my program that it turns off the video acceleration.

The question is, how do I turn off video Acceleration programmatically?

All computers are running XP and at least the second service pack. It would take me ages to manually logg in to all those computers and change that setting so thats why I want the program to be able to do it automagically for me.

Answer 1

Using the suggested process of running procmon, and filtering out unnecessary data, I was able to determine the changes in the registry when this value changed:

Full Video Acceleration:

[HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Preferences\VideoSettings]
"PerformanceSettings"=dword:00000002
"UseVMR"=dword:00000001
"UseVMROverlay"=dword:00000001
"UseRGB"=dword:00000001
"UseYUV"=dword:00000001
"UseFullScrMS"=dword:00000000
"DontUseFrameInterpolation"=dword:00000000
"DVDUseVMR"=dword:00000001
"DVDUseVMROverlay"=dword:00000001
"DVDUseVMRFSMS"=dword:00000001
"DVDUseSWDecoder"=dword:00000001

No Video Acceleration:

[HKEY_CURRENT_USER\Software\Microsoft\MediaPlayer\Preferences\VideoSettings]
"PerformanceSettings"=dword:00000000
"UseVMR"=dword:00000000
"UseVMROverlay"=dword:00000000
"UseRGB"=dword:00000000
"UseYUV"=dword:00000000
"UseFullScrMS"=dword:00000001
"DontUseFrameInterpolation"=dword:00000001
"DVDUseVMR"=dword:00000000
"DVDUseVMROverlay"=dword:00000000
"DVDUseVMRFSMS"=dword:00000000
"DVDUseSWDecoder"=dword:00000000

So, in short, set

• PerformanceSettings
• UseVMR
• UseVMROverlay
• UserRGB
• UseYUV
• DVDUseVMR
• DVDUseVMROverlay
• DVDUseVMRFSMS
• DVDUseSWDecoder

to 0, and set

• UseFullScrMS
• DontUseFrameInterpolation

to 1.