4.2

determined by the GOP structure property (described above).
The maximum GOP size you can choose within Compressor is
15 frames (NTSC) or 12 frames (PAL and 720p). The minimum
GOP size for all video formats is 6 frames (closed GOP) or 7
frames (open GOP).
Automatically select bit rate: Select this checkbox to have
Compressor automatically compute the best for the
output file, based on the duration of the source file. To
manually adjust the bit rate, deselect the checkbox and drag
the “Average bit rate” and “Maximum bit rate” sliders (or enter
values in the adjacent fields).
YUV 422 color encoding: This property appears in most built-
in settings that output MPEG-2 files. Select this checkbox to
use YUV 422 color encoding for superior chroma quality.
Cropping and padding
Customize the final cropping, sizing, and 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 .
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 fields; 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 file.
bit rate
aspect ratio
Modify frame size overview