Apple Compressor 3 - Manual (Page 223)

• Allow Job Segmenting: This checkbox allows you to turn off job segmenting. It is relevant
only if you are using Compressor with distributed processing and with multi-pass
encoding. (The distributed processing feature is limited to computers that have
Final Cut Studio installed.) Since 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 .
• Video, Audio, and Streaming buttons: These buttons open the Video, Audio, and
Streaming panes, described next.
• Allow Podcasting information: Select this checkbox to ensure that podcasting annotations
and metadata are written to the output media file. This is available for audio files only.
To make this option available, deselect the Video Enabled checkbox at the top of the
Video pane.
Video Pane
The Video pane allows you to make settings for the quality (ISMA profile), frames per
second (fps) rate, key frame interval, and bit rate of your MPEG-4 Part 2 output file.
Either enter a number in
the Bit Rate field or use
the slider to set the bit
rate (only available with
“Constant at” setting).
The pane contains the following controls.
• Video Enabled checkbox: Make sure that this checkbox is selected if you want the MPEG-4
Part 2 output format video settings to be applied.
• ISMA Profile buttons: Choose from one of the following MPEG-4 Part 2 quality settings:
• Basic (0): Ensures playback on all MPEG-4 Part 2 devices.
• Improved (1): Gives better output quality, but this setting is not compatible with
older MPEG-4 Part 2 devices.
• Frame Rate (fps) pop-up menu and field: Choose or enter a number to set the overall
frame rate of your output media file.
• “Key frame interval” field: Enter a value to designate how often (number of frames) you
want key frames created in your output media file.
223 Chapter 19 Creating MPEG-4 Output Files