Apple Compressor 3 - Manual (Page 184)

• 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.) For more information, see
Job Segmenting and Two-Pass or
Multi-Pass Encoding .
• Video and Audio tabs: These buttons open the Video and Audio tabs described next.
About the MPEG-1 Video Tab
You use the Video tab to make settings related to the video format.
The Automatic button
• Enabled checkbox: Make sure this checkbox is selected if you want the MPEG-1 output
format to include the Video tab settings.
• Frame Rate pop-up menu: Choose the frame rate of the video you are encoding.
• With Purpose set to Web: The choices are 23.976, 25 (PAL frame rate), 29.97 (NTSC
frame rate), and Automatic.
• With Purpose set to DVD: The choices are 25 (PAL frame rate), 29.97 (NTSC frame rate),
and Automatic.
• Automatic button: Clicking the Automatic button forces the encoder to determine the
proper frame rate by choosing the rate that most closely matches the source frame
rate.
Note: Using the Automatic setting with nonstandard source frame rates may result in
output frame rates that do not match the intended video frame rate. For example, a
source frame rate of 15 fps with the Purpose set to DVD results in an automatic selection
of 25 (PAL). If you are intending to use the output on an NTSC DVD, you must choose
29.97 as the frame rate.
184 Chapter 17 Creating MPEG-1 Output Files