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Quicktime movie is 720x480, but iDVD makes it a 640x480 - WHY?

884 Views 7 Replies Latest reply: Nov 13, 2012 9:11 AM by Klaus1 RSS
FrankG4 Calculating status...
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Nov 7, 2012 11:21 PM

My camcorder records at 720x480 resolution. iMovie makes Quicktime movies at 720x480 resolution. But, when I import the movie into iDVD 7.1.2 it makes the final DVD product with a 640x480 resolution - so the picture looks squeezed horizontally by 88.8% (e.g. circles become vertical elipses). How can I get the correct resolution output from iDVD. I've tried using the wide screen mode, but results are still 640x480. Note: If I make a Quicktime movie at 740x480, then import into iDVD wide screen mode, the result is wider than 640x480 (probably 740x480), but the quality has deteriorated since the original footage was recorded at 720x480 and iMovie adds pixels to fill out to 740x480 (i.e. adds blurring horizontally) - not a good solution at all. Another note: when I made a 730x480 Quicktime movie, iDVD produced a 640x480 output. Any ideas how to get true 720x480 output with iDVD on a wide screen? Comment: would expect to have black bars on the left/right edges to fill out the wide screen with my 720x480 movies.  -- Frank

Mac Pro, Mac OS X (10.7.5), iDVD 7.1.2
  • Klaus1 Level 8 Level 8 (43,385 points)

    What camcorder are you using?

  • Klaus1 Level 8 Level 8 (43,385 points)

    I have checked the specs:



    but can see no reference to what aspect ratio the recorded video is in.


    The normal aspect ratios are:


    PAL (for Europe):


    Standard DV (4:3) 768 x 576

    DV Widescreen (16:9) 1050 x 576


    NTSC (for the USA):


    Standard DV (4:3) 720 x 528

    DV Widescreen (16:9) 874 x 480


    Is this a very old camera, since it does not record in standard aspect ratios?

  • Daveontv Calculating status...

    Hi Guys,


    I have a similar problem.  I imported my 16:9 quicktime video into iDVD; have all the settings (as far as i know) set to burn the DVD in the same 16:9 aspect ratio, but the preview shows the video with an aspect ratio of 4:3, even though the viewer itself is shaped in 16:9 (see attached photos 1&2).  The interesting thing here is that, when I play the DVD in another player, it plays in 16:9 - go figure.


    iDVD settings:

    Screen shot 2012-11-13 at 7.01.22 AM.png



    Screen shot 2012-11-13 at 6.49.54 AM.png


    The other part of this is, when i play the DVD on my iMac, it again plays it with an aspect ratio of 4:3. Moreover, when I click on "Get Disc Info", there it shows the video (viewer and all) in 4:3 aspect ratio as well (see photo 3).


    Screen shot 2012-11-13 at 6.56.39 AM.png


    While it's good that the DVD plays correctly on outside DVD players, sometimes it doesn't; this hit or miss stuff can be very frustrating.


    Any help would be greatly appreciated.


    Thanks so much!




  • Klaus1 Level 8 Level 8 (43,385 points)

    Maybe iDVD just has this self-imposed limitation of forcing us to use

    it for 4:3 and 16:9 input files?


    Yes, those are the only ratios on offer, as they are the only ratios anyone would use, being the stadard ratios of TV screens!


    3:2 is a normal ration for digital photos, not videos. Are you sure you have the right settings on the camera?


    Is there another DVD authoring program for MAC that will allow for a

    variable dimension ratio video


    I have never heard of one. Movie creation, yes. You can set any ratio you like in Quicktime Pro. (Useful for picture-picture sometimes).


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