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commonguy101
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create a 1440 x 1080 comp

Apr 14, 2013 2:56 PM

Hi,

 

I need to create a 1440 x 1080 comp which is the same dimentional size of my video.

I tried to create a new comp and dragged my video to new comp icon, what I get is not a 16:9 aspect ratio.

 

The only thing I could get 16:9 aspect ratio is by selecting HDTV 1080 preset.

As this preset is designed for 1920 x 1080, my video is only 1440 x 1080. Not sure if this is the correct approach. The preview in AE looks fine to me, am I doing it right?

 

Why doesn't AE let me create 1440 x 1080 comp with 16:9 aspect ratio? Anyone know?

 

I attach a screen capture of my setting of creating 1440 x 1080 comp but this setting only give me 4:3 aspect ratio.

 

Thanks.

Screen Shot 2013-04-14 at 5.14.19 PM.png

 
Replies
  • Currently Being Moderated
    Apr 14, 2013 3:56 PM   in reply to commonguy101

    > Why doesn't AE let me create 1440 x 1080 comp with 16:9 aspect ratio?

     

    It is. Your screenshot shows that you're looking at a 16:9 composition.

     

    Look at the "Frame Aspect Ratio" value on the right side of the dialog box in your screenshot. It says that your composition frame is 16:9.

     
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  • Currently Being Moderated
    Apr 15, 2013 12:06 AM   in reply to commonguy101

    You need to read up on that pixel aspect ratio stuff...

     

    Mylenium

     
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  • Currently Being Moderated
    Apr 15, 2013 8:00 AM   in reply to commonguy101

    There is a pixel aspect ratio compensation switch at the bottom of the comp window.  It looks like a double-headed arrow.  Toggle it on, and you will see 16x9.

     
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    Apr 15, 2013 1:55 PM   in reply to commonguy101

    You have created a composition that uses non-square pixels. This is correct for a composition with the number of pixels that you have for a frame aspect ratio of 16:9. Clicking the button that Dave mentioned shows you the result in the Composition panel with non-square pixels.

     

    You need to read the documentation about pixel aspect ratio, as Mylenium suggested:

    http://help.adobe.com/en_US/aftereffects/cs/using/WS3878526689cb916558 66c1103906c6dea-7f86a.html#WS3878526689cb91655866c1103906c6dea-7f3aa

     
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  • Currently Being Moderated
    Apr 15, 2013 7:03 PM   in reply to commonguy101

    You are not understanding pixel aspect ratios and your footage. Here's the problem, 1440 X 1080 is a standard comp size for a non square pixel format. There's only one of those formats and it's not useful for anything but acquiring footage from the cameras that use that format. You're better off, unless you specifically need to render back to the DVCPro codec that supports this frame size, working in a 1920 X 1080 Square Pixel HD comp. Your graphics will look better, you won't be sub pixel sampling still images brought in to the project, and you'll be able to see exactly what the project will look like.

    If you drag your DVCPro HD footage into a 1920 X 1080 comp then it will fit perfectly. No need to do anything.

    If there's a specific reason that you MUST render back to the DVCHD Pro format then let us know. Other wise, just use a standard HD comp with a matching frame rate. You will be a happier camper

     
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