Apple Compressor (4.0) - Manual (Page 183)

Chapter 7 Advanced functions 183
Output Image Inset (Padding) controls
Use these controls to apply and adjust padding. Padding scales the image to a smaller size while
retaining the output image’s frame size by filling the “padded” areas with black. Unlike cropping,
padding does not remove any of the source image.
Padding is useful when the source image frame size is smaller than the output image frame
size and you want to prevent the source image from being scaled to the output image size. By
adding the correct amount of padding, the source image will remain the same size in the output
image, with black filling the rest of the image frame.
Padding is automatically applied when the source video image is uncompressed NTSC 720 x
486 and the output image is 720 x 480. There are also several common padding settings you
can choose from, such as 16 x 9 and Panavision. These presets make it easy to have Compressor
automatically enter padding values to ensure the source image retains its original aspect ratio.
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Padding pop-up menu: Choose a padding method from this pop-up menu.
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Custom: Lets you manually enter custom values in the Left, Right, Top, and Bottom fields.
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Preserve source aspect ratio: Pads the image so that the original aspect ratio is maintained.
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4x3 1.33:1: Uses a 4:3 aspect ratio.
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16x9 1.78:1: Uses a 16:9 aspect ratio.
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4x3 1.33:1: Uses a 4:3 aspect ratio.
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Panavision 2.35:1: Uses a 2.35:1 aspect ratio.
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Europe Standard 1.66:1: Uses a 1.66:1 aspect ratio.
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UK Standard 1.75:1: Uses a 1.75:1 aspect ratio.
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Academy 1.85:1: Uses a 1.85:1 aspect ratio.
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Left, Right, Top, and Bottom: These fields let you customize the dimensions of the black padding
around the sides of a frame (when the Padding pop-up menu is set to Custom).