QuickTime 7.6.2 won't play videos - blank screen, no sound

I have tried AVI files from my hard drive and Flash videos from the Internet. My computer runs Flash 10. MP3 audio files work okay.

I don't know what Second Life is. You mention .avi on your HD, Gspot will tell you what codecs are being used in the .avi container, read it.
To view .swf from the internet you need Adobe flash plug-in as Kirk pointed out, QT does not handle .swf or .flv
These two links are in regard to FLV Player, not to be confused with the other flash plug-in
http://www.martijndevisser.com/blog/flv-player/
http://www.pcworld.com/downloads/file/fid,63307-order,6-page,1/description.html
This is a example of a .flv file from You Tube, it can be saved from the Temporary Internet Files folder to another folder and played with FLV Player.
http://www.youtube.com/watch?v=yjbpwlqp5Qw
I'm not sure what your trying to do, but hopefully this info is of some help to you

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Hello:
This is my first post. I read through the forums and this seems to be the correct place to pose my question. If it's not, my apologizes.
I'm trying to find out why Quicktime 7.6.4 won't play h264-encoded video on my MacMini (G4 PPC). I'm running 10.4.11. I recently installed Perian 1.2.1 and it got some .avi files to play correctly, whereas before there was no sound. But the h264 files still get me a black screen, albeit with sound now. Some h264 files can be played in VLC Media Player (but that's a horrible player compared to Quicktime in my opinion, as it constantly drops frames and eats 100% of my processor time), but VLC even has the black screen problem on some h264 files as well.
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Mr Ram,
There is a group of Quicktime specialists in Apple.com ⇒ Support ⇒ Discussions ⇒ Quicktime .
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GNU/Linux's free offerings
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