4.2

If the source media file contains audio, retiming modifies the audio
speed as well, thereby keeping audio and video in sync.
Compressor also automatically corrects the pitch so the audio
does not sound artificially high or low.
Important: If you modify retiming properties in a setting that uses
the QuickTime Movie format and choose “Copy audio tracks from
source” in the Audio inspector, the audio speed is not changed.
Consequently, audio in the output file will not maintain sync with
the video.
In the Quality section of the Video inspector you can set the
retiming quality to specify the processing method used when you
make changes to another settings that modify the speed or frame
rate of a clip.
Modify timing and frame rate
You can modify the duration of a transcoded file by adjusting
controls in the General inspector. You can modify the frame rate
of a transcoded file by adjusting controls in the Video inspector.
Choose a new duration for a transcoded file
1. Do one of the following:
In the batch area, click an output row to select a setting in
a job. With this method, the modifications you make will be
used for outputting only that job.
In the Settings pane, select a custom setting from the