iTunes movies skipping

Discussion in 'Mac Basics and Help' started by athenax79, Nov 6, 2008.

  1. athenax79 macrumors newbie

    Joined:
    Nov 6, 2008
    #1
    I am using a 450 mhz powerpc g4. I can play dvds on it fine with no problems but when I try to play an itunes movie it skips. Also skips on quicktime and video and audio out of sync. I have all other programs closed. Does anyone know how to fix this or what the problem is? Why can i play dvds but not downloaded itunes movies?
     
  2. charlesbronsen macrumors 6502a

    charlesbronsen

    Joined:
    Oct 22, 2008
    Location:
    Toronto, Ont
    #2
    i have this problem watching movies in itunes as well...
     
  3. Cave Man macrumors 604

    Cave Man

    #3
    The problem is your G4. Movies from iTunes are encoded in MPEG-4/H.264 and your G4 cannot handle the decompression fast enough. MPEG-2, the codec of DVDs, is far less compressed, thus they play just fine on a G4.
     
  4. charlesbronsen macrumors 6502a

    charlesbronsen

    Joined:
    Oct 22, 2008
    Location:
    Toronto, Ont
  5. Cave Man macrumors 604

    Cave Man

    #5
    You shouldn't be. What other tasks are running on your Mac? (Check Activity Monitor and sort by cpu%.)
     
  6. charlesbronsen macrumors 6502a

    charlesbronsen

    Joined:
    Oct 22, 2008
    Location:
    Toronto, Ont
    #6
    I was only using itunes and firefox, nothing else was using up the cpu or mem resoucres. everything seems to work fine with vlc.:confused:
     
  7. athenax79 thread starter macrumors newbie

    Joined:
    Nov 6, 2008
  8. Cave Man macrumors 604

    Cave Man

    #8
    1. Find the iTunes Store file that's skipping in the Finder.
    2. Right-click on it, then from the pop-up menu choose to open it in QuickTime (i.e., not iTunes).
    3. From QuickTime's Window menu, choose Show Movie Inspector.
    4. Play the movie and see what's happening to the frame rate.
     
  9. charlesbronsen macrumors 6502a

    charlesbronsen

    Joined:
    Oct 22, 2008
    Location:
    Toronto, Ont
    #9
    will have to wait till i get home, but i will report back. thx
     
  10. charlesbronsen macrumors 6502a

    charlesbronsen

    Joined:
    Oct 22, 2008
    Location:
    Toronto, Ont
    #10
    ok so they play fine in quicktime and framerate is steady 25. it just seems ti stutter when watching through itunes..
     
  11. Cave Man macrumors 604

    Cave Man

    #11
    Somehow, iTunes is not running properly. It uses Quicktime for playback, but clearly QT is functioning properly. What does Activity Monitor report when you get the stuttering?
     
  12. rolywight macrumors newbie

    Joined:
    Mar 8, 2013
    #12
    itunes

    Some one told me to try
    CTRL- Alt - Delete
    start task manager
    find itunes in processes
    right click and change the priority to High
    Now try
     

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