QuickTime player no longer plays .AVI files

Don't use Divx.
http://perian.org/
http://dynamic.telestream.net/downloads/download-flip4macwmv.htm

I play avi files with QuickTime on Lion. No problem at all.

I too am having trouble playing .AVI files with Quicktime X with Perian installed under Lion. Quicktime 7 works fine however.

Use VLC. Don't ever use anything else. QuickTime has many problems in Lion. I can't play some MOV files that I used to be able to play! How stupid is that?

Hmm, there are several similar questions in this forum.
https://forums.macrumors.com/threads/1208882/
Seem now don't have good yet free solutions.

I am also having problems with Quicktime X playing some (not all) .avi & .mov files.

Quicktime 7 Pro (that has carried over on my computer since Leopard) still plays everything fine.

The video of MPEG4 files in the AVI format plays fine on Lion for me. The audio, however, is another story: the only sound I can get out of Lion while trying to play AVIs is a loud, fast-paced beep/hiss. Very annoying. And this is with no external codecs other than Perian installed. It seems to especially afflict AVI files with AC3 audio, but not with good old fashioned MP3 or even MP4/AAC audio. Of course, VLC plays the videos fine, as it doesn't use Apple's QT Frameworks.

Install MPlayerX from the app store. It's free, plays everything, and even handles full screen with multiple monitors correctly!

You'll never use Quicktime player again once you've tried MPlayerX.

The only nice thing about QuickTime and Perian is that they (used to) work with quicklook to provide icons and previews. Now, that function doesn't work, as the audio in Lion consists solely of horrible bleeps and blips.

derbothaus said:

Don't use Divx.
http://perian.org/
http://dynamic.telestream.net/downloads/download-flip4macwmv.htm

Click to expand...

Thank you!!! I've been having these same problems lately and have been searching for a solution and installing Perian worked like a charm, instantly. Seriously, can't understand why the QT engineers couldn't figure it out on their own. WTF?