1 2 Previous Next 26 Replies Latest reply: Jun 29, 2008 4:10 AM by prof d hall
richyb Level 1 Level 1 (45 points)
If you look at the number of posts in the forum regarding the problems with 7.5 and the reports from people (such as myself) who fixed the problem by reverting to 7.4, its easy to come to the conclusion that yes there are problems with the latest quicktime (especially on ppc).

generally people are saying their computers played video fine (especially DV) until they installed 7.5 via software update, after that the video became jerky. It seems like lots of the replies to the posts say something like 'it can't be quicktime', 'your machine is too slow' etc.

Obviously it is quicktime (in 99% of cases at least).

I formatted my hard drive and the problems went away, I then installed 7.5 they returned. I then downgraded quicktime via pacifist and the problems went away

Please, please the people who are replying with non-helpful 'your machine is too slow' stop.

Apple messed up, 7.5 obviously wasn't tested properly.

Mac Pro 2.66, Mac OS X (10.4.10)
  • 1. Re: Quicktime 7.5 has problems..... no really
    Baby Boomer (USofA) Level 9 Level 9 (55,575 points)
    You should keep in mind that these are technical support forums. Generally, the only people posting here are those with problems. The thousands/millions without problems don't ever come here.

    I happen to be in the group that has never had any problems using QT at any version.
  • 2. Re: Quicktime 7.5 has problems..... no really
    Klaus1 Level 8 Level 8 (44,495 points)
    Considering the huge user base for Quicktime and the fact that only a few dozen users have posted here, the problems described in these forums do not appear to be confined to users of either Leopard or Tiger, or either PPC or Intel Macs, but relatively speaking they are few and far between. I have had no problems at all after installing QT 7.5.

    it is therefore reasonable to assume that something in either your pre-existing setup or your method of installing updates, are the root causes of whatever problems you are having with QT 7.5 particularly with choppy playback. Out of date plug-ins and add-ons could also be playing a part.

    A few things to try but in each case first close all applications and repair permissions.

    1 Try opening then closing GarageBand, or launching then quitting the "Audio MIDI Setup" application located in Applications/Utilities. Failing that, go back to Audio MIDI Setup, and under the Audio Devices tab, make sure the Audio Output Format is 44100.0 2ch-16bit.

    Restart your Mac.

    2 Go to the Library on your main hard disk and find the Internet Plug-Ins folder. Try removing the following files:

    QuickTime plugin.plugin
    Quicktime plugin.webplugin

    Restart your Mac.

    Re-install the Quicktime 7.5 update

    Go to Home/Library/Receipts and delete the file Quicktime 7.5 pkg.

    Download from the Download page on the Apple site the correct version of Quicktime 7.5 for your Mac.

    Install it and restart your Mac. Repair permissions.

    3 If still no luck, it is time to look carefully at your plug-ins and add-ons. The safest way is to download and re-install all of them. The ones you need in order to see and hear virtually everything the web has to offer are:

    RealPlayer 11 (which is no longer in beta) for Mac from (you may need a different site for the US):


    Flip4Mac WMV Player from http://www.microsoft.com/windows/windowsmedia/player/wmcomponents.mspx (Windows Media Player for the Mac is no longer supported, even by Microsoft)

    Perian from http://perian.org/

    You should read this support page http://perian.org/#support in case you need to delete older codecs.

    Adobe FlashPlayer should first be uninstalled using the appropriate uninstaller available here: http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_14157&sliceId=2 and then the latest version obtained from here: http://www.adobe.com/shockwave/download/download.cgi?P1ProdVersion=ShockwaveFlash and installed.

    (You can check here: http://www.adobe.com/products/flash/about/ to see which version you should install for your Mac and OS.)

    You should also ensure that you have downloaded and installed all the correct version for your Mac of all recent Security Updates.
    (N.B. Security Updates require both a restart and a permission repair.)

    In Macintosh HD/Library/Quicktime/ delete any files relating to DivX (Perian already has them). However it should be noted that Perian is not an internet plugin and will not play DivX files imbedded on a website. For that you will need the DivX Player browser plugin available from http://www.divx.com/divx/mac/

    Now go to Safari Preferences/Security, and tick the boxes under Web Content (all 4 of them) to enable Java.

    Lastly open Audio Midi Setup (which you will find in the Utilities Folder of your Applications Folder) and click on Audio Devices. Make sure that both Audio Input and Audio Output, under Format, are set to 44100 Hz, and that you have selected 'Built in Audio'.

    Important: Now repair permissions and restart.

    There is an additional 'fix' you could try if you are having problems with Flash and Quicktime, depending on which type of Mac you have:

    On Intel Macs, make sure that you are not running Safari in Rosetta. You can check this, and change it, in the Get Info window.

    On PPC Macs, go to the Hard Disk/Library/Internet Plug-Ins folder, and drag the file 'QuickTime Plugin.webplugin' to the desktop. Quit and restart Safari. If things have improved you can trash that file. If they haven't put it back, as the lack of this plug-in can cause QT content in some widgets to cease functioning.

    If none of the foregoing worked, then you should consider and archive and install before repeating all of the above.
  • 3. Re: Quicktime 7.5 has problems..... no really
    richyb Level 1 Level 1 (45 points)
    Personally I used software update and a newly formatted Leopard installation. The problem is with quicktime on some systems, my system (regarding choppy video) worked fine before 7.5 and works again after restoring 7.4. As I said update was done via apples own software update.
  • 4. Re: Quicktime 7.5 has problems..... no really
    Chris Walsh1 Level 1 Level 1 (5 points)
  • 5. Re: Quicktime 7.5 has problems..... no really
    Chris Walsh1 Level 1 Level 1 (5 points)
    I'm having problems that I've never had encoding HDV video. It's happening on my g5 AND my g4. The g4 has been wiped and new software put on it. It's the quicktime without a doubt. Period.
  • 6. Re: Quicktime 7.5 has problems..... no really
    Knockadoon Level 1 Level 1 (0 points)
    having problems also... half my.avi files dont play sound anymore and I can't work out why some do and some don't - It's all a bit strange!
  • 7. Re: Quicktime 7.5 has problems..... no really
    Nancy E Level 1 Level 1 (0 points)
    what is the tiny bug that I see crawling around in your message. I've never seen that anywhere before.
    Does that mean a virus in your note??
  • 8. Re: Quicktime 7.5 has problems..... no really
    A.Webb Level 1 Level 1 (0 points)
    That's it exactly! I've spent all this time researching, trying to find some sort of difference between the files that have sound and those that don't. (For the record, they still have audio in VLC, but it doesn't work in quicktime or imovie).
  • 9. Re: Quicktime 7.5 has problems..... no really
    A.Webb Level 1 Level 1 (0 points)
    How do I revert to 7.4? Even though I deleted 7.5 and it's package, and then restarted, installer keeps telling me that I have a newer version so I can't install this one.
  • 10. Re: Quicktime 7.5 has problems..... no really
    A.Webb Level 1 Level 1 (0 points)
    I did a LOT of experimenting and downloaded freeware Perian and now the sound is back for all my files! I was editing video when I updated to 7.5, so getting it resolved is a huge relief!
  • 11. Re: Quicktime 7.5 has problems..... no really
    Klaus1 Level 8 Level 8 (44,495 points)
    Glad you confirmed what I have been saying in various threads on this vexed subject:

    Never update software in the middle of a project

    Do not have any applications open when you update

    Make sure your add-ons and plug-ins are up to date.

    If necessary run the update installer again.

  • 12. Re: Quicktime 7.5 has problems..... no really
    Baby Boomer (USofA) Level 9 Level 9 (55,575 points)
    "Does that mean a virus in your note??"

    Nope! There are no known viruses for OS X.

    The tiny bug is a +cyber gnat+.

  • 13. Re: Quicktime 7.5 has problems..... no really
    richyb Level 1 Level 1 (45 points)
    Very good points Klaus1!

    Don't forget another two though. If you are a software developer:

    Make sure all software is thoroughly tested before adding it to a semi-automated software update

    Fix your dodgy software as soon as you can once a problem has been discovered
  • 14. Re: Quicktime 7.5 has problems..... no really
    parkerpress Level 1 Level 1 (35 points)
    OK. I'll "byte". Where do I get a Cyber Gnat for myself. Or, more specifically, "How'd you do that?".

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