Quicktime x will not open

I think I have a file association issue. I have a piece of paper and pencil for a quicktime x icon and quicktime will not open. I have tried to look for ways to uninstall and reinstall quicktime x but I am new to the Macbook Pro so I'm not familiar on how to navigate through the more advanced settings. I have looked through forums and could not find what I was looking for. It will not let me click on a file and "open with" quicktime. I click on quicktime in the applications folder and it opens for a second on the dock and then closes out. Please help me out. I have been using DivX instead of quicktime but I like the format of quicktime better.
Thanks, Pam

Another thing i have found in regards to this issue and quicktime is.
When you join two clips that have both been encoded with handbrake at apple tv setting. So they both have aac as first track and ac3 as second. When they are joined together and then saved as a .mov file (so without exporting). The resulting file will play fine in itunes and quicktime, but on the apple tv, at the point where the second clip has been joined on, apple tv looses the audio.
The audio is playing as ac3 on the first clip.
Also to note when played in itunes, with joined clips you dont have the option to select between ac3 and just aac. But when playing the clip on appletv my av unit definitely shows the first clip as playing in ac3.
Any ideas as to what the story is?
What is quicktime doing when it joins the two clips?

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I accidentally deleted QuickTime from my computer. Then I did a system restore and retrieved it. Now Itunes can't find QuickTime and will not open. Is there a fix for this without my Ipod?

I accidently deleted QuickTime from my computer. Then I did a system restore and retrieved the program. Now Itunes can't find QuickTime and will not open.Is there a eazy fix for this without using my Ipod? Ihave 6K songs in Itunes that I can't get to.
Thank You
T-BILL

Hmmm. There's a couple of things that might be going on with that one.
Let's try an uninstall and reinstall of QuickTime first.
If you're using XP, head into your Add or Remove Programs control panel. Select "QuickTime", click "Change" and then click "Remove".
If you're using & or Vista, head into your Uninstall a program control panel, select QuickTime, and then click "Uninstall".
You can get QuickTime back either via Apple Software Update (in your Start menu go "All Programs > Apple Software Update" ... QuickTime should appear in the "New Programs" section), or by downloading a QuickTimeInstaller.exe from the following location:
http://support.apple.com/kb/DL837
Does your iTunes launch properly now?

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I recently purchased Quicktime Pro v.7 for the PC. After installation I was able to access the program ONCE. Now when I attempt to open the program, it appears to be opening then drops to the bar a the bottom of the screen (minimized). It will not expand / restore, so it's really quite useless. I re-installed it several times, even got a clear download and removed the old file. It simply will not work. I spent what seems like a lifetime looking for help on this site, or (imagine this concept) some sort of actual interactive support option here at Apple.com.
If anyone can help or knows the secret handshake to actually talk to someone at Apple, please share.
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Resolved! I used some of the KB info on the Apple site and gleaned that the problem may be with the user identity. Don't know why, and don't really care at this point. What I did was create a new user on my computer, then using that identity, opened QT Pro. It worked! Then, I switched back to the other ID and QT Pro opened for that user as well. (Note the word 'switched' may be related to the message 'switching' on the QT Pro opening window.)
I hope this works for you too. After I got the app to open for my original identity, I was able to delete the new one and it continues to work fine.
And finally, yes, I was able to get the app to open by opening a .mov file. Good luck!

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My Quicktime stopped functioning. If I try to open it, or a movie, it opens momentarily and then crash dives and disappears. It was working fine yesterday. I've downloaded and re-installed it. (I had the Pro version, but didn't attempt to add my registration number ... as the standard version isn't opening.)
The only thing I've done since yesterday: I re-installed Spectrasonics RMX ... going through the installation of about five updates. Haven't ever heard of any conflict between Spectrasonics and Apple Quicktime.
I've trashed my Quicktime 'preferences'. I've repaired my 'permissions'. I'm at a loss.
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I checked all suggestions. I uninstalled an M-audio FastTrackPro driver that one article suggested might be a problem.
All my earlier movies will open, if I double click them ... they open in Quicktime, play fine. I can't open Quicktime by itself, it just fails. If I try to open the Spectrasonic Tutorial movies (QT's) the Player also fails. I can open these with MPEG Streamclip just fine.
The problem started when I downloaded the Spectrasonics Tutorials, which never did open properly in Quicktime. And Quicktime itself won't open by itself. But functions fine when opened with other movies.
At a loss...

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could not be opened. The movie is not in a format that QuickTime Player understands.
I click the more info, and since then I have downloaded and installed Perian versian 1.22 - xvid, divx, all the components I can find. One at a time, all at once, various ways, repaired disk permissions on all occasions and still it refused to open.
I then installed QT7 from the OSX disk. But this also refused to open the files. Interestingly enough, VLC media will play them, but Mpeg Stream Clip does not!
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I agree with your advice to wait for another update.
I see you also have cinepak issues (another string)
An important aside:
buried in the installer legalese (that we all tend to blow through) is a note that the MPEG2 plugin has been updated for 7.6. You get the updated plugin by going to the Apple Store, signing in, go to your account-- software purchases. There you will find the matching MPEG2 updater.
Message was edited by: Gregory Jones1 Strike throughs were showing --- WTH?

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It is really frustrating... I've ripped my hair so much I have bald spots and they are growing by the minute
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I was afraid of that.. :-(
Yeah... well, I've tried to import the files to iTunes, both through drag'n drop and by Files/Add to Library but nothing, zip, zero happens. Not even an error message appears. I have no problem with adding mpeg4 files but I get no reaction when trying to add the wma's...

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This happens when I open a file with QuickTime Player, or open it directly.
I tried to open it with the Terminal, and the message I recieved was:
"Illegal instruction:4"
I saw a question which had a similar problem but with lots of default apps, after an upgrade to Lion, or Mountain Lion. They fixed the problem by repairing disk permissions via Disk Utility. I've done that, and it hasn't helped.
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Well, I've had this problem for ages, but it's suddenly started working. Perhaps it was a recent software update.
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Control right-click did not help.

Wow, it looks like your software is very very old.
The current version of QuickTime is 10.3. The current version of OS X is 10.9.1. (Your profile indicates you are running OS X 10.5.8, Leopard. Leopard was released in 2007.)
The current version of iTunes, 11.1.4, will not run on Leopard.
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excellent news. glad you're up and running again.
here's what was probably going on. since itunes and quicktime (and ituneshelper) are internet applications, your Firewall will be keeping an eye on modifications to those programs. typically a new set of rules is generated for the new versions of the applications. so it's possible for the Firewall to allow the earlier version of the application, but balk at the newer one (because there's different sets of rules for each one).
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Quicktime x will not open

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