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Activity Forums Compression Techniques Dimensions keep changing??? It is breaking my brain!!!!

  • Dimensions keep changing??? It is breaking my brain!!!!

    Posted by Natasha O’cconor on June 4, 2008 at 12:31 am

    I have a clip and I go to the “get info” box and it reads that the dimensions are 720×576.
    I then go to QT and look in the info material box there and my dimensions are now 1024×576? What does this mean?

    Brian Alexander replied 16 years, 1 month ago 4 Members · 4 Replies
  • 4 Replies
  • Rich Rubasch

    June 4, 2008 at 2:40 am

    I think you are seeing the actual dimensions of the clip (720 x 576) in the get info box, and in QT you are seeing the DISPLAY dimensions, 1024 x 576. Sounds like anamorphic footage. It is squeezed horizontally for capture, but would be displayed at the wider frame size for the correct aspect.

    Rich Rubasch
    Tilt Media

  • Ben Waggoner

    June 4, 2008 at 3:56 am

    And in fact 1024×576 is the default display resolution for PAL 16:9 (720 * 1.7777 = 1024)

    Ben Waggoner
    Principal Video Strategist, Silverlight
    Microsoft Corporation

    Compression Blog: on10.net/blogs/benwagg/
    Compression Classes at Stanford and PSU: on10.net/blogs/benwagg/21622/

  • Natasha O’cconor

    July 7, 2008 at 10:14 am

    ok ok – So I am TRYING to export Mpeg 2s Multiplexed 720×576 16:9. Every-time I export I see the footage as 720×404? I am entering my works ads competition and their requirements are 720×576 16:9. I have tried everything and it is due now! Just have to get them in my midnight tonight. Somebody out there can put me straight again..?

  • Brian Alexander

    March 24, 2010 at 3:43 am

    Did you ever find a solution to your problem? How did your submission go?

    Here’s what I’m seeing from this end (although it’s a moot point); the 720 x 576 (1024 x 576) is a PAL based frame. The 720 x 404 sounds like a 16:9 letter-boxed image in a 720 x 480 NTSC frame.

    Just thought I’d throw it out there.


    Brian Alexander
    Sr Video Engineer
    Freeman AVS

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