Apple Compressor 3 - Manual (Page 165)

• PAL: This format is referred to as 576p. It uses a 720 x 576 frame size with an
anamorphic 16 x 9 format at 50 fps.
• 720p: This format uses a 1280 x 720 frame size with a 16 x 9 format at either 59.94 fps
for NTSC or 50 fps for PAL.
• 1920x1080: This format is referred to as 1080p. It uses a 1920 x 1080 frame size with
a 16 x 9 format at either 59.94 fps for NTSC or 50 fps for PAL.
• Frame Rate: Use this pop-up menu to choose a frame rate for the output media file.
The Frame Rate setting also has an Automatic button. Clicking the Automatic button
causes the encoder to choose the frame rate that matches the source video file.
The Frame Rate
Automatic button
Note: If you choose a format in the Video Format menu, the Frame Rate menu will be
filled in automatically.
Use the Frame Rate pop-up menu to choose from the following options:
• 23.98: Used for NTSC-based video
• 25: Used for PAL-based video
• 29.97: Used for NTSC-based video
• 50: Used for PAL-based video
• 50.94: Used for NTSC-based video
• Average Bit Rate slider and field: Use the slider to choose an average bit rate to use for
the output video, or enter a value directly. Although the available range is between
0.5 Mbps and 24.99 Mbps, typical HD-based DVD video bit rates with H.264 might range
from 7 Mbps to 15 Mbps, depending on your DVD bit budget and the nature of your
source media files. The H.264 file format is twice as efficient as the standard MPEG-2
format. This means you can count on a lower bit rate to get the same quality, or higher
quality at the same bit rate. See
About the Bit-Rate Settings for more information.
• Maximum Bit Rate slider and field: Choose a maximum bit rate between 0.59 Mbps and
29.4 Mbps. You can also enter any number within these ranges into the accompanying
field. The Maximum Bit Rate cannot be set lower than the Average Bit Rate. As a general
rule, set your maximum bit rate at least 1 Mbps higher than your average bit rate, to
allow for bit-rate variability in achieving the goal of constant quality.
165 Chapter 13 Creating H.264 for DVD Studio Pro Output Files