iMovie: Jerky playback & editing

Discussion in 'Mac Applications and Mac App Store' started by merQrial, Aug 6, 2006.

  1. macrumors newbie

    Joined:
    May 13, 2004
    #1
    Hi guys,

    while in imovie, i can't get the edit playback smooth. quality is set to standard, 30fps, the clips (mpeg4) are fine as is the music (aac). even when i export to quicktime: same problem. I have 30gigs available of hard disk, not running other programs, disk warriored my permissions. Any help would be great.

    All the best,

    Q
     
  2. macrumors G4

    Applespider

    Joined:
    Jan 20, 2004
    Location:
    looking through rose-tinted spectacles...
    #2
    How many audio clips do you have? More than 99? If so, iMovie will turn to sludge and be v jerky. Group some together and export them to sound only, then dump the original and reimport your groups so that you have less than 50.
     
  3. thread starter macrumors newbie

    Joined:
    May 13, 2004
    #3
    Hi mate,

    I have 23 plus 2 still pics.
     
  4. macrumors G4

    Applespider

    Joined:
    Jan 20, 2004
    Location:
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    #4
    OK... then what machine are you using? If it's got a slow HD, then the amount of space isn't going to mean much.

    RAM and HD speed (if it's only a 4200rpm) then you might need to pick up an external one for editing (and backup!)
     
  5. thread starter macrumors newbie

    Joined:
    May 13, 2004
    #5
    Its a 1Ghz G4 Powerbook with 768 SDRAM. I have been using a 5400 rpm external drive to store & work on the projects, but also tried moving the project to the native HD to see if that helped. It didnt.
     
  6. macrumors G4

    Applespider

    Joined:
    Jan 20, 2004
    Location:
    looking through rose-tinted spectacles...
    #6
    You might just need more power to do it - or set the edit playback quality to lowest in iMovie and resign yourself to v long export times.

    I use an external 7200 hard drive with 1.25GB of RAM to edit on my 1.25Ghz Powerbook and it's OK.

    On the few occasions when I tried with 512MB and on the internal, the results weren't good.
     
  7. thread starter macrumors newbie

    Joined:
    May 13, 2004
    #7
    thanks so much. still no joy. is there any hidden things on my re-formatted hd that i dont know of?

    thanks for your time
     
  8. macrumors newbie

    Joined:
    Aug 9, 2006
    #8
    Try creating a short test project in NTSC DV format, and see how it is. MPEG is probably more CPU hungry than DV, you might gain speed by switching formats.
     

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