1080i and Pixel Aspect Ratio

Discussion in 'Digital Video' started by mediaboy, Nov 19, 2007.

  1. mediaboy macrumors member

    Joined:
    Sep 9, 2006
    #1
    I just bought the JVC GZ-HD7U - Specs here

    I have been playing with importing the 1920x1080 in FCP, but the Pixel Aspect Ratio does not have 1920x1080 option.

    Only:
    960x720
    1280x1080
    1440x1080

    I dont know if I am missing something.

    Thanks for any help.
     
  2. LethalWolfe macrumors G3

    LethalWolfe

    Joined:
    Jan 11, 2002
    Location:
    Los Angeles
    #2
    HDV records as 1440x1080 (un-square pixels) which is then displayed as 1920x1080.


    Lethal
     
  3. bimmzy macrumors regular

    bimmzy

    Joined:
    Dec 29, 2006
    Location:
    London
    #3
    OH NO!

    another camera with the 1880i "feature"!
    yuck :eek:
     
  4. huntercr macrumors 65816

    Joined:
    Jun 6, 2006
    #4
    I believe all HDV cameras record at this resolution. That's the way it was defined... presumably to stay within the miniDV bandwidth limitation.

    Most SD cameras' CCD sensors that are not full resolution either. There are websites like camcorderinfo.com that do tests and publish their "real" resolutions. The results are quite interesting.
     
  5. LethalWolfe macrumors G3

    LethalWolfe

    Joined:
    Jan 11, 2002
    Location:
    Los Angeles
    #5
    There are two HDV specs. HDV1 is 720p, HDV2 is 1080i. Of course I'm still not sure what the point of bimmzy's post is.


    Lethal
     
  6. jettoblack macrumors member

    Joined:
    Nov 1, 2006
    #6
    If you are shooting in 1920x1080 then it has a pixel aspect ratio of 1, also known as square pixels. The frame aspect ratio is 16:9 and 1920/1080=16/9. You shouldn't need to enable any options for pixel aspect ratio, the default should be square pixels.

    The only time you need to correct for pixel aspect ratio is when you have non-square pixels. For example, HDV (1440x1080) or DVCProHD (1280x1080) making up a 16:9 frame, which means the pixels are not square.
     
  7. bimmzy macrumors regular

    bimmzy

    Joined:
    Dec 29, 2006
    Location:
    London
    #7
    my point is that 1080i is a messy HD standard, where as 720p though only an interim HD standard is preferable, as it displays better on the new HD plasma or lcd displays.

    1080i looks great on a crt but look messy on the newer kinds of display.
     

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