Apple Compressor 2 User Manual
Page 147
Chapter 10
Creating MPEG-2 Output Files
147
5
If you want to use the timecode from your source video, leave the “Choose start
timecode” checkbox unselected. Otherwise, select this box and enter a new timecode.
6
If you have checked the “Choose start timecode” checkbox, and if your video format is
NTSC, select the “drop frame” checkbox if you want to use drop frame (rather than
non-drop frame) timecode.
See “
” on page 130 for more information.
Step 2:
Choose Quality settings
In the Quality tab, you set the MPEG-2 encoding attributes that have the greatest
influence on the resulting quality of your MPEG-2 video output file: encoding mode,
average and maximum bit rate, and type of motion estimation.
1
Click the Quality button in the MPEG-2 Encoder pane to open the Quality tab.
2
Make a selection from the Mode pop-up menu.
For best image quality, choose One pass VBR Best or Two pass VBR Best. For faster
encoding, with excellent image quality, choose One pass VBR or Two pass VBR. For HD
sources, choose either One pass VBR Best or Two pass VBR Best.
With two pass modes, the source media file is examined on the first pass and
transcoded on the second pass, with bit rates tailored to the video content.
Alternatively, one pass modes transcode the material more quickly, but allocate bits
less optimally than do the corresponding two pass modes.
Note: If you are using two pass VBR and Compressor 2 or higher with distributed
processing enabled, you may want to uncheck the “Allow Job segmenting”
checkbox in the Encoder pane. See “
Job Segmenting and Two Pass VBR
for more information.
Mode pop-up menu
Motion Estimation
pop-up menu
Bit rate calculator.