4.1

Chapter 4 Advanced adjustments 32
Video properties
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Frame size: Use the pop-up menu to set the frame size (resolution) 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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Automatically select bit-rate: Select this checkbox to have Compressor automatically compute
the best bit rate for the output le, based on the duration of the source le. If the checkbox
is not selected, you can set the average and maximum bit rates by dragging the “Average bit
rate” and “Maximum bit rate” sliders or entering values in the text elds.
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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.
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: This pop-up menu sets 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 option 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: This pop-up menu sets 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.
Quality
The following properties set the processing algorithm used during the transcoding process. For
more information about using these controls, see Retime video and audio output on page 71,
and Modify timing and frame rate on page 72.
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Resize lter: This pop-up menu sets the resizing method. There are three options:
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Fast (Nearest Pixel): Provides the fastest processing time.
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Better (Linear Filter): Provides a medium trade-o between processing time and output quality.
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Best (Statistical Prediction): Provides the highest output quality, but takes longer.
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Retiming Quality: This pop-up menu sets the retiming method. There are four options:
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Fast (Nearest Frame): Uses a copy of the nearest available frame to ll the new
in-between frames.
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Better (Motion Adaptive): Uses deinterlacing on areas of the source le that contain
movement to produce good-quality output.
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Best (Motion Compensated): Uses deinterlacing on areas of the source le that contain
movement to produce high-quality output.
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Reverse Telecine: Removes the extra elds added during the telecine process to convert the
lm’s 24 fps to NTSC’s 29.97 fps. Choosing this item disables all the other Quality controls. For
more information, see About reverse telecine on page 74.
67% resize factor