Pitiful weenie video choppy on Leopard Mac Pro

I have some old movie files that QuickLook likes, but QuickTime Player seems to dislike. I had no problems with them under Tiger on my old dual 2.7 G5, but my 8-core Mac Pro (Leopard) can't seem to play them well. If I go fullscreen then QT Player is happy, but in its own window the framerate drops as low as 9 fps.
The funny thing is that the smallest at 144x112 pixels, 25 seconds, and 1.8MB total file size, is arguably not exactly taxing the limits of 2008 computing technology... The format is MPEG1 Muxed.
I could hunt all these old files down and re-encode them with VisualHub or something, but that really seems like overkill...
Why would this be happening?

Make sure you have the following installed:
VLC Media Player
Perian (AVI and FLV support)
Adobe Flash Player Software
Repair permissions & restart your computer when done.
Another thing to try:
Go to YouTube, open any video and press pause (don't do this while video is playing). Click the ctrl key or “right click” the mouse in the middle of the video window. The settings for flash player will pop up.
Select the video settings then select "enable hardware acceleration." Press close. Now RESTART YOUR COMPUTER not just Safari if that is your browser of choice.

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Good day, I can not make video calling with my MAC PRO 15 with FB Mountan Lion operating system how can I do?    you can you help me? thank you very much

good day,
I can not make
video calling
with my MAC PRO 15
with FB
Mountan Lion operating system
how can I do?
   you can you help me? thank you very much

francesco marraffa wrote:
good day,
I can not make
video calling
with my MAC PRO 15
with FB
Mountan Lion operating system
how can I do?
   you can you help me? thank you very much
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Nicolas.Olivier wrote:
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MikeJamesG wrote:
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Hi,
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Anyone ?!
Thanks as always,
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Pitiful weenie video choppy on Leopard Mac Pro

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