Apple Compressor (4.0) - Manual (Page 117)

Chapter 5 Custom settings and output formats 117
1 In the Inspector window, click the Encoder button and choose MPEG-4 from the File Format
pop-up menu.
The MPEG-4 Encoder pane opens, with .mp4 in the Extension field and the Video tab open.
Note: The Allow Job Segmenting checkbox allows you to turn off job segmenting. It’s relevant
only if you’re using Compressor with distributed processing and with multi-pass encoding.
Because the MPEG-4 Part 2 format uses single-pass VBR, you can leave this checkbox selected
in all cases for added speed gains with distributed processing. For more information, see
Job
segmenting and two-pass or multi-pass encoding on page 249.
2 Adjust the following MPEG-4 video settings:
•
Video Enabled: Make sure that this checkbox is selected if you want the MPEG-4 Part 2 output
format video settings to be applied.
•
Video compression: Choose the MPEG-4 compression format to use:
•
MPEG-4 basic: Ensures playback on all MPEG-4 Part 2 devices.
•
MPEG-4 improved: Gives better output quality, but this setting is not compatible with older
MPEG-4 Part 2 devices.
•
H.264 main profile: Similar to the H.264 baseline profile but with support for standard-
definition (SD) video requirements.
•
H.264 baseline profile: Primarily for video conferencing and mobile applications.
•
Frame Rate: Choose or enter a number to set the overall frame rate of your output media file,
or click the Automatic button to have Compressor choose the frame rate.
•
Key Frame Interval: Enter a value to designate how often (number of frames) you want key
frames created in your output media file, or click the Automatic button to have Compressor
choose the key frame interval rate (the displayed value is 0 with Automatic on; the actual value
is determined during the encoding process).
•
Multi-pass: Select this checkbox for higher-quality results but at the expense of longer
encoding times. This checkbox is available only when you choose an H.264 option from the
Video Compression pop-up menu.
•
Bit Rate: Drag the slider to set the overall video bit rate for your output media file, or enter a
number in the accompanying field.