Did you download the video with iTunes or create it yourself? You can download something free on iTunes to try and narrow the the problem down a little.
If it happens with all videos, you want to take a look at this -> Troubleshooting iTunes for Windows Vista or Windows 7 video playback performance issues
It happens with all videos - I have purchased quite a few from the iTunes Store and also created my own, and neither type is viewable in iTunes.
I'll check out the troubleshooting page and let you know if any suggestions there help.
Update: I tried all the steps on the troubleshooting page with no success, but I'm not surprised. Most of the tips deal with making changes to QuickTime configuration settings - but my problem started when the first version of iTunes that no longer required QuickTime was released.
Thanks for the suggestion, though.
Message was edited by: scmibis
Not sure I quite understand the first question - when I right-click the video in iTunes, I don't see "Reveal" as one of the choices in the context menu.
When I do the latter (open with QuickTime from Windows Explorer), the video plays correctly. That's the only way I've been able to play videos lately.
Maybe you have a iTunes plugin that's causing a problem. Try safe mode and removing plugins as shown here -> iTunes: Troubleshooting issues with third-party iTunes plug-ins
If that doesn't work, try removing iTunes, QuickTime, and their related components and then download and reinstall iTunes.
Bingo - your persistence is greatly appreciated. I wasn't even aware I had any plug-ins installed.
Now ... where do I find them? The iTunes help mentioned visual effects, but making changes to the visualizer settings once I restarted iTunes in normal mode made no difference.
Your next suggestion is eagerly anticipated.
Update - the article suggestion looking for plug-ins in the following locations:
C:\Users\username\App Data\Roaming\Apple Computer\iTunes\iTunes Plug-ins\
The first folder is empty (even with hidden files revealed); the second doesn't exist. I did find some plug-ins at C:\Program Files (x86)\iTunes\Mozilla Plug-ins, but deleting those had no effect.
Can iTunes be started in safe mode from the command line/a shortcut?
Message was edited by: scmibis
I believe the Apple Push process (APSDaemon.exe) is also stopped when starting iTunes in Safe Mode. Since there aren't any plug-ins, maybe something is conflicting with that service.
Try temporarily killing the process from CTRL+ALT+Delete or disabling it in MSConfig.
If it works, you'll probably want to look at the security software on the computer, run through this -> iTunes: Troubleshooting security software issues
Major sigh ... I went into Task Manager and killed that process directly, then tried running a downloaded video. No luck.
As for security software, I've been using MS Security Essentials for the better part of two years and haven't had any problems.
No, this problem started with the release of iTunes that no longer used QuickTime to play videos. Damned if I know why ... but I seem to be the only person having this particular problem.
Is there a way to start iTunes in safe mode from either the command line or a shortcut, via one or more parameters?
I didn't solve it so much as I've got a workaround. It's definitely due to some sort of visualization add-in that (a) is fouling up the video player and (b) can't be accessed, disabled or uninstalled.
Now, before I click on the iTunes icon, I hold down the Ctrl and Shift keys simultaneously. Keep them pressed until you see a dialog popup that says you're launching iTunes in safe mode. This affects NOTHING other than it disables whatever visualization gunk was installed, and it allows you to play all media and do all of the other normal functions, just like it used to.
Hope this helps.