QuickTime Doesn't Recognise Some MP4 Files

Discussion in 'OS X Mountain Lion (10.8)' started by LadyX, Aug 11, 2013.

  1. LadyX macrumors 68020


    Mar 4, 2012
    When opening an MP4 file with QuickTime Player I get this:

    The movie's file format isn't recognised. To see if additional software is available that will enable QuickTime Player to open the movie, click Tell Me More.

    When I click on Tell Me More, it navigates me to this: http://support.apple.com/kb/HT3775?viewlocale=en_US

    where it shows that MP4 files are supported by QuickTime. So I don't understand why I get this message when opening some (not all) mp4 files.

    I've also tried VLC, NicePlayer, Flip Player, DivX.

    I have been searching for a solution to this problem but I didn't find any, I have Perian installed but it doesn't seem to work properly because it should play MPEG-4 files via QuickTime but it doesn't.
  2. ggifford macrumors newbie

    Nov 18, 2012

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