Quicktime not opening AVI files in Lion.

I am having the same issue as DonAndion. Upgraded to Lion, AVI files that worked previous no longer works.

Have tried removing DivX and installing Perian. Still no dice.

Tried uninstalling and reinstalling DivX, no dice.

Please help!

AVI is just a container not a codec. To help narrow this down, can you play the AVI using QuickTime Player 7? Also, use the Inspector when in QuickTime Player (Command - I) to find out the format used. You'll see everything from the video codec (i.e. H.264, mpeg4 etc...) as well as audio information, size, bit rate etc...

I'm almost a 100% sure I've uninstalled the entire (DivX) codec. I went through an "uninstall DivX" uninstaller, and no longer see it in Applications (or Luanch Pad- which I suppose is now the same thing). Tried to Spotlight search for "DivX For Mac", nothing coming up.

Also went throug system prefrences and I don't see any codecs there, expect for Perian and flip4mac.

😟

No, I can't play any of the movies with Quicktime, although I checked the version, it looks like it's 10.1, not 7.

I uninstalled Divx and re-installed Perian and then restarted my computer and now its working! Thank God!!

Unistalling and re-installing Perian seems to work. What can also be done (from my tests), is to get info on the problematic movie file in the Finder and check the 'Open with...' option. If it says 'QuickTime Player' look for and select 'Perian - Open QT Player' and then double click the video file. It should open and play as expected if it requires decoding that Perian understands. After that, all similar video files should play without having to make that change.

It appears, from what I've seen (and the re-install of Perian seems to confirm), that QTX forgets that Perian is there and needs a brief wake up call. I'm going to assume that this will also apply to video files which require decoding via Flip4Mac. The helper app that QTX would initially need/use is the WMV Player.

Uninstalling DivX and then manually removing Library/Application Support/DivX in the user's directorry seems to work (with Perian installed).

I thought that I have the same problem, but only happens with some types of avi. I check the codec of my avi files and the problem is not the codecs, the problem is the subtitles flies (.srt).

When subtitles file is removed, avi files work fine with QuickTime X.

Somehow Perian was missing after upgrading to Lion OS X, so after I re-installed & restarted my MacBook my AVI files now work with QuickTime!🙂

I got it fixed! I had to uninstall Perian, Restart, redownload the dmg, reinstall and replace the old one in system prefrences. But now it works! 😀

Like Patrick Ellis1 I need to continue to use Perian and Flip For Mac. I install Quicktime Player 7 into the Utilities Folder Per Apple Article HT3678, " Installing Quicktime Player 7 on Mac OS 10.6 Snow Leopard." I also run an ancient PrefPane called "Default Apps." In Default Apps one can designate which application is the default for any specific extension. Movies in iTunes 10.4 work fine, and i have set Quicktime Player 7 as the default for .wmv, .avi, .mov etc. and they play faultlessly. If I try to play the same file on Quicktime X, all I get is the audio (no video) or a blank screen.

BTW I am using an Apple USB keyboard, a Logitech USB Mouse and the new Apple Trackpad (with "natural" scrolling swithed off). So far, so good.

I had the same issue and installed Flip4mac, that got my wmv files playing but I had to install perian to get AVI's working.

Everything is perfect now.

google: VLC OSX

download the latest version for 32 or 64 bit

all your video problems will be solved

Flip4mac is garbage

get VLC