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Old 29th July 2004, 12:25   #1  |  Link
winnuh
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Projector problem

I have googled my ass off and wandered through many forums. Hopefully one of you people can enlighten me with this specific problem.
First of all, this is the setup:

Athlon XP based PC
Geforce 3
this system is connected to a projector through the vga output.

Now... Whenever watching a movie(dvd/divx) and a fast scene comes up, especially during horizontal panning, a horizontal line appears in the middle of the image. It's like the lower half cannot keep up with the upper half.
Could this be a refresh rate problem? It's now set to 1024x768@60Hz. Whenever the refresh rate is increased(i.e. 75Hz) the image gets kind of shaky/distorted. I actually never tried watching a movie @75 Hz because of that reason. I will try that tomorrow, but it would be nice to get some answers to help me in the right direction.
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Old 29th July 2004, 13:10   #2  |  Link
unmei
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A projector is a device that knows nothing about motion in the picture.
It recieves the same amount on pixels all the time.

I guess the problem is already in your computer (maybe you just don't see it when watching on the computer display). I know this effect from the WMR 7 and especially there WMR 9 direct show output "device".

To check wether this is indeed the problem you could set your player to use a different renderer. If you can't set that in your player, try Media Player Classic and in the View->Options->Playback->Output, set DirectShow Video to Overlay Mixer (eventually you need to restart the player).
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Old 30th July 2004, 06:35   #3  |  Link
Joe Fenton
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Projectors use LCD displays. LCDs have slow update rates. Displaying at 60Hz is too fast for the LCD to keep up. That's why LCDs are unpopular with gamers.
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