4.2

MPEG-2 encoding in Compressor combines
frames into Groups of Pictures (GOP) during
the encoding process to remove redundant
frames and output a highly compressed file.
Important: When you apply an MPEG-2
setting to your source file, Compressor
automatically assigns many of the setting’s
properties (including the frame rate, which
determines the “GOP structure” and “GOP
size” properties) based on the properties of the
source file. These automatically assigned
properties are strongly recommended.
However, if you’ve manually set the “Frame
rate” property of the MPEG-2 setting, you can
also set the values for the “GOP frame order”
Group of Pictures