Quicktime wont play files it played before

cant get quicktime to play files it played last week mkv files if that helps any solutions

Yea...I did this when I got my Mac for Christmas 2009. I can watch the videos no problem...WITHOUT SOUND! If I use VLC everything works right, but I want to be able to burn the videos to DVD to watch somewhere else too. I bought a Mac because this was supposed to be easier...NOT!
Thinking of going back to a PC. At least everyone knows they have issues.

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    Message was edited by: Christofff

    Hi, I could not see my AVI movies either (they are HD taken with a Fujida HD-6T camera). I have Quicktime Version 10.0 (90.3.1), iPhoto version 8.1 (415) and Mac OS 10.6.2.
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    Hi,
    I actually did contact the publisher and they were very helpful. Here is a copy of the email they sent me. It should solve your problem. Good luck!
    Thank you for contacting Peachpit Press. We apologize for the errors with
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    Muxed audio formats do not export audio when QuickTime is involved.
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  • I have a site with m4v files that played before the upgrade to 10.6.7, now just sound

    I have a site with m4v files that played before the upgrade to 10.6.7, now when accessed the sound plays but no video. Is there a different file type I should create or is this a glitch w/this version? Played before & still plays-Mac b4UG-PC/Iphone/Ipad.
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    Video Link: http://www.myfarrah.com/ACT7.php
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    Are you using Safari or Firefox? It runs as expected in Firefox, but in Safari I too get just the sound, and going to the m4v link causes the movie to download rather than play (it downloads fine and plays in Quicktime once downloaded). I checked some of my own m4v movies, and they were playing fine in Safari. For one embedded in a complex web page, see here:
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    There was a problem with a Safari plug-in misbehaving very early in Snow Leopard, but I no longer remember the details. But see this archived discussion:
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    Also make sure the file type is not of a DivX. That your camera supports. Which QT for Mac also supports, but the Windows version of QT does not support DivX, so you're not purchasing something for the Windows computer that is not needed?

  • I'm on OS X 10.6.8 and have a .mov file which plays on QuickTime 10.0 but with choppy video and the sound is out of sync???? File details are Video Codec: DNxHD (AVdn) Resolution 1920x1080 Audio Codec: PCM S24 BE (in24) Bitrate: 1536kb/s Solutions?

    I'm on OS X 10.6.8 and have a .mov file which plays on QuickTime 10.0 but with choppy video and the sound is out of sync???? File details are Video Codec: DNxHD (AVdn) Resolution 1920x1080 Audio Codec: PCM S24 BE (in24) Bitrate: 1536kb/s.  Any ideas?

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  • Quicktime wont play video content from youtube

    hi there i recently purchased an imac i have been sent a link to a video on the youtube web site when i try to view the video all i get is the quicktime symbol with a question mark in it.
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    Go to Adobe.com........
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  • Embedded QuickTime files not playing sound

    I'm having trouble getting older, embedded QuickTime files to play properly. Many of them do play but without sound.
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    http://www.linguistics.ucla.edu/people/schuh/lx001/Web_Quizzes/Quiz_07/07web.htm l
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    Safari: 6.1.6
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    2009 Mac Mini: video and sound play correctly in Safari and Firefox
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    Firefox: 33.1 with QuickTime Plugin 7.7.1
    Firefox: 36.0.1 with QuickTime Plugin 7.7.1
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    QuickTime X: 10.2
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    OS X: 10.9.5
    Safari: 7.1.3
    Firefox: 31.0 with QuickTime Plugin 7.7.1
    Firefox: 36.0.1. With QuickTime Plugin 7.7.3
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    QuickTime X: 10.3
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    Safari: 8.0.3
    Firefox: 36.0.1 with QuickTime Plugin 7.7.3
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    QuickTime X: 10.4
    2011 Mac Pro: no sound in videos, improper display of video with menu in both Safari and Firefox
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    Safari: 8.0.3
    Firefox: 36.0.1 with QuickTime Plugin 7.7.3
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    QuickTime X: 10.4
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    Thanks!

    Is this a Yosemite issue? Not being able to play older QuickTime 7 files properly? I'm not sure what else the issue could be since everything seems to work fine in 10.7, 10.8, and 10.9 (unfortunately, I have been unable to test this in 10.10 or 10.10.1). Maybe I'm overcomplicating a simple issue? Any help would be greatly appreciated.
    Some very interesting observations which peaked my own curiosity due to on-again, off-again nature of the playback. I suspect this is either a "bug" or represents content handling changes that are currently in the process of  "evolving." Not a web site programmer so I used iWeb to run some contrast-comparison tests on how audio was handled by the plug-in software when directly accessing the content by its URL and via the page embed strategies. My results mirrored yours in that:
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    2) The same files all played correctly when content was accessed by the plug-in software directly using the URL reference.
    3) None of the files containing legacy audio compression formats would play audio using the plug-in software using a web page embedding strategy.
    4) An MP4 (H.264/AAC) version of you original clip played correctly in all instances.
    5) Replacing your QDM2 audio track with an AAC audio track in the original MOV file allowed the file to play correctly in all instances.
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  • Quicktime video (.mov file) will not load and play in Firefox 3.6.16

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    Large, 5min long Quicktime .mov HD file I received says it's converting when I try to open and play it in Quicktime 10.3 but then stops and tells me it's not a supported file type, a program I downloaded to try and convert the file type also told me the same thing.
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    http://support.apple.com/kb/ts1718
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