QuickTime no longer plays certain MP4 files

After upgrading from 10.6 Snow Leopard to 10.9 Mavericks, I've noticed that all the MP4 files taken with my Samsung smartphone no longer play in QuickTime (or with Quick Look), whereas they played just fine in Snow Leopard. The MP4 files use the H.264 codec. Some other MP4s I have, which use the same codec, will play in QuickTime and Quick Look. I've also found some older MOV files (using the SVQ-3 codec) that don't play now.
Has anyone else encountered this? Is there any fix, or does it perhaps require an OS update? Since I skipped OS 10.7 and 10.8, I don't know what the situation was there.

Try downloading and using the QuickTime 7 from here: http://support.apple.com/kb/DL923 - it might have some of the older file support still working whereas the QTX does not.

Similar Messages

  • QuickTime no longer plays certain MP4 and MOV files

    After upgrading from 10.6 Snow Leopard to 10.9 Mavericks, I've noticed that all the MP4 files taken with my Samsung smartphone no longer play in QuickTime (or with Quick Look), whereas they played just fine in Snow Leopard. The MP4 files use the H.264 codec. Some other MP4s I have, which use the same codec, will play in QuickTime and Quick Look. I've also found some older MOV files (using the SVQ-3 codec) that don't play now.
    Has anyone else encountered this? Is there any fix, or does it perhaps require an OS update? Since I skipped OS 10.7 and 10.8, I don't know what the situation was there.

    You may have better luck in the Quicktime threads.
    https://discussions.apple.com/community/mac_os/quicktime
    This post by martbr explains the situation well…
    https://discussions.apple.com/message/23530041#23530041
    Try Quicktime player 7 (it's better if you have a QTPro 7 code)
    http://support.apple.com/kb/DL923
    It seems to support everything that it did before Mavericks (including Flip4Mac & Perian codecs), what is different is that the OS uses AVFoundation not Quicktime, the former doesn't support additional codecs therefore there is little hope of getting Finder previews for files with unsupported codecs.

  • Quicktime 7.2 will no longer play specfic mp4 files

    Quicktime 7.2 will no longer play specfic mp4 files that 7.1 and earlier versions play fine, But new mac running 10.4.10 will not let me install earlier version, these files where used and edited fine on similar spec mac running 10.4.9 (both intel)

    You did nothing wrong!
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  • Quicktime no longer plays my mp4's smoothly since i updated my system, any thoughts ?

    I have been enjoying my Gopro Hero and playing mp4's on my Macbook. I updated the book from 10.5.8 to 10.7.5. With the upgrade Quicktime got upgraded to 10.1. All other aspects of the upgrade work fine however mp4s that played smoothly before are now unwatchable as Quicktime will not play them smoothly.
    Any thoughts would be appreciated.
    BTW This is my first time here, i posted this in the wrong section earlier. Sorry.

    Before I answer, let me provide a bit of history.
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    Personally I don't use OSX more than 10 hours a year and then for VERY specific tasks that I absolutely can't do in Mac OS 9.2.2. So I have no clever way to give you for reverting. My brute-force approach would be to erase an unused disk and install everything that you had on the original disk on the erased disk before you let auto-update loose on the ill-fated original one.
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  • Quicktime no longer plays my mp4's smoothly

    I have been enjoying my Gopro Hero and playing mp4's on my Macbook. I updated the book from 10.5.8 to 10.7.5. With the upgrade Quicktime got upgraded to 10.1. All other aspects of the upgrade work fine however mp4s that played smoothly before are now unwatchable as Quicktime will not play them smoothly.
    Any thoughts would be appreciated.

    Before I answer, let me provide a bit of history.
    When iMovie was released, it was written in the "C" programming language. It stayed that way through v2.1.2. Then in v3.0 it was re-written in a language called "Cocoa". The result was a product that couldn't be used for more than a few minutes before it crashed or destroyed the video footage it was being used to process. It took several releases before iMovie resurfaced as something to be trusted.
    Now Apple has done it again with Quicktime. This time the rewrite was from a collection of languags to "Objective C". And voila; we have "Mavericks" and Quicktime 10.1. And another period of time to avoid Quicktime "upgrades".
    Personally I don't use OSX more than 10 hours a year and then for VERY specific tasks that I absolutely can't do in Mac OS 9.2.2. So I have no clever way to give you for reverting. My brute-force approach would be to erase an unused disk and install everything that you had on the original disk on the erased disk before you let auto-update loose on the ill-fated original one.
    You might also ask in a forum that is specific to OSX. This forum is actually for the older stuff that was released before X showed up.
    Gary

  • Quicktime playback distortion on some mp4 files

    I am having a problem playing some mp4 files through Quicktime. When the video is played in Quicktime (or Pro Presenter 4), portions of the video turn into distorted white blocks that move with the video. It doesn't continue throughout the whole video, but I can't discern when or why it only affects certain portions. It does it every time at those places in the video. I downloaded VLC, and the same exact file plays perfectly fine in VLC and on other computers through various programs. I have only seen this problem on this computer.
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    One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
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  • Is there a way to play an mp4 file at the beginning of a published project only when the project is accessed from a specific site?

    Is there a way to play an mp4 file at the beginning of a published project only when the project is accessed from a specific site?
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    AimeeLove,
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    1 = 250
    2 = 500
    3 = 750
    4 = 1000
    5 = 1250
    6 = 1500
    7 = 1750
    8 = 2000
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    10 = 2500
    11 = 2750
    In the mouseover section for 12 o' clock, put this code...
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         var pos = sym.getPosition();
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  • Message by mpv and ffplay when playing certain flac files

    When playing certain flac files with mpv or ffplay, I experience colored messages which might be warnings or errors in the terminal. I don't hear that something is wrong with the audio and therefore I ignored it for a long time. But I'm a bit curious why this message occures because the files are converted from CDs with the flac tool itself. The output I am talking about looks like this (in orange) when playing with mpv:
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    Thanks for your answer!
    karol wrote:Are you using mpv and ffmpeg from the repos?
    Yes, they are the vanilla packages from the repos.
    karol wrote:Have you tried playing these files on another, non-Arch, system?
    Well, I just updated an old Gentoo (which took some time) and experience the same messages with these files. Interestingly, when I fastforward, the message does not appear (on both systems).
    karol wrote:Google shows these messages are pretty common, but since nothing seems to be broken, I don't think you need to worry.
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  • Premiere Elements 4 audio won't play on mp4 files, codecs missing/unavailable on .mov files

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    Does Quicktime Pro also edit .mov files on a PC?
    Date: Wed, 27 Nov 2013 07:53:14 -0800
    From: [email protected]
    To: [email protected]
    Subject: Premiere Elements 4 audio won't play on mp4 files, codecs missing/unavailable on .mov files
        Re: Premiere Elements 4 audio won't play on mp4 files, codecs missing/unavailable on .mov files
        created by Steve Grisetti in Premiere Elements - View the full discussion
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