4.1.2

Chapter 4 Advanced adjustments 48
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Field order: Use the pop-up menu to set the output scanning method (either the eld
dominance or a conversion to progressive scanning). There are four options:
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Same as Source: Maintains the same scanning method used by the source media le.
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Progressive: Scans complete frames (not frames divided into interlaced elds).
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Top First: Scans interlaced elds, giving dominance (eld order) to the top eld.
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Bottom First: Scans interlaced elds, giving dominance (eld order) to the bottom eld.
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Add clean aperture information: Select this checkbox to dene clean picture edges in the
output le. To do this, information is added to the output le to dene how many pixels to
hide, ensuring that no artifacts appear along the edges. When you play the output le in
QuickTime Player, the pixel aspect ratio will be slightly altered; however, note that this process
does not aect the actual number of pixels in the output le—it only controls whether
information is added to the le that a player can use to hide the edges of the picture.
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QuickTime settings: You can change the type of video compression by clicking the Change
button and using the controls in the Standard Video Compression Settings window to modify
the compression as appropriate. After you click OK and close the window, the setting’s video
properties update to show your changes.
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 67.
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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 determine how the video will be resized, retimed, and otherwise
adjusted when transcoded.
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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 and with lower-quality output.
•
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:
•
Fast (Nearest Frame): Uses a copy of the nearest available frame to ll the new
in-between frames.
•
Better (Motion Adaptive): Uses deinterlacing on areas of the source le that contain
movement to produce good-quality output.
•
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 72.
67% resize factor