4.1

Chapter 4 Advanced adjustments 29
Video properties
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Frame size: Use the pop-up menu to set an automatically calculated frame size (resolution)
range for the output le. For more information, see Modify frame size overview on page 69.
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Pixel aspect ratio: For settings that use the H.264 format, the pixel aspect ratio is set to Square.
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Frame rate: Use this pop-up menu to set the playback rate (the number of images displayed
per second) for the output le. For more information, see Frame rate options overview on
page 71.
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Field order: For settings that use the H.264 format, the eld order is set to Progressive
(complete frames are scanned).
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Multi-pass: Select this checkbox to turn on multi-pass encoding that uses additional analysis
of video frames to produce a high-quality output le. For faster (single-pass) transcoding, turn
this feature o by deselecting the checkbox.
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Bit rate: Select the Automatic checkbox to have Compressor calculate the appropriate bit rate
for the output le, based on the frame size of the source le and device compatibility. If the
checkbox is not selected, you can set the bit rate by dragging the slider or entering a value in
the text eld.
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Frame sync: Select the Automatic checkbox to have Compressor calculate the key frame
interval rate.
Note: When Frame sync is turned on, the value in the seconds eld is zero (.0). However, the
actual value is determined during the encoding process.
If the checkbox is not selected, you can drag the slider or enter a value in the text eld to
set the key frame interval (number of frames) at which you want key frames created in your
output le.
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Encode for: Select a button to have Compressor transcode the output le at either the best
quality (so that the le will play back on newer devices) or at a lesser quality (so that as many
devices as possible will play the le).
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Compatible with: This list shows devices that will play the transcoded le (compatible
device types are marked with a green circle that contains a checkmark ). When you
change the setting’s properties (frame size, frame rate, and so on), the compatibility list
automatically updates.
Cropping and padding
Customize the nal cropping, sizing, and aspect ratio using the Cropping & Padding properties.
Cropping removes video content from an image. Padding scales the image to a smaller size while
retaining the output image’s frame size. For more information about these properties, see Modify
frame size overview on page 69.
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Cropping: Use this pop-up menu to set the dimension of the output image. The custom option
allows you to enter your own image dimensions in the elds; other options use predetermined
sizes. The Letterbox Area of Source menu item detects image edges and automatically enters
crop values to match them. This is useful if you want to crop out the letterbox area (the black
bars above and below a widescreen image) of a source media le.
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Padding: Use this pop-up menu to set the scaling of the output image while retaining
the output image’s frame size. The custom option allows you to enter your own scaling
dimensions in the elds; other options use predetermined dimensions.
67% resize factor