decrease quality after importing to imovie 09

Discussion in 'Digital Video' started by wallisgigichan, Aug 23, 2010.

  1. wallisgigichan macrumors newbie

    Feb 23, 2010
    Hi everyone,

    I am a total amateur in digital video editing. my goal is simple - to capture some HD home video and do a little bit of editing, nothing too fancy.

    I have a Canon LEGRIA HF M31 and imovie 09. the problem is, when i preview the different clips to import, they look great! i have make sure i chose "import HD video as - FULL original size". but as soon as those clips are imported in an event, there are a lot of "lines" across the image, and if i edit those clips in a project then export it, the quality drops even further. but with each steps i made sure i chose the highest quality possible.

    My question is simple: is my camcorder not supported by iMovie? or i am missing a step?

    i have search for answers online, and the term interlacing and progressive keep coming up. i have no idea what they mean either...

    any help will be greatly appreciated!


  2. KeithPratt macrumors 6502a

    Mar 6, 2007
    The lines are interlacing and should be there. You can see them in iMovie because computers, unlike TVs, can't properly display interlaced video (though they can do some processing that mimics what you see on a TV — more of which below).

    What you do about it is down to where you're going to view the end product. If it's destined for TV, just ignore it and all will look fine in the end. If it's destined for YouTube you want to de-interlace by discarding a field. If you just want to watch and store it on your computer you might be best leaving it as is and using VLC and its on-the-fly bob de-interlacing (which will look as it would on TV).
  3. wallisgigichan thread starter macrumors newbie

    Feb 23, 2010
    Thanks for the quick reply! It certainly looks great on TV, thanks again!

Share This Page