4.5

139Compressor User Guide
When film is telecined to NTSC video, it has a constant cadence. This means that the 3:2
pattern is consistent and uninterrupted. It’s relatively easy to remove the telecine from a
constant-cadence clip because you need only determine the pattern once.
If you take these telecined clips and edit them as NTSC video, the result is a final video
file that has a broken cadence with an inconsistent 3:2 pattern. It’s much more difficult to
remove the telecine from such a clip because you have to constantly verify the cadence
to make sure you don’t inadvertently choose incorrect fields when creating the 23.98 fps
video.
The reverse telecine feature in Compressor automatically detects broken cadences and
adjusts processing as needed.
Perform a reverse telecine frame rate conversion
1. In Compressor, 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 Custom area. (If the Settings
pane is hidden, press Shift-Command-1.) With this method, the modifications you
make will be saved to the custom setting for future use.
2. In the inspector pane, click Video to open the Video inspector.
If the inspector pane is not visible, click the Inspector button in the upper-right
corner of the Compressor window.
3. In the Video Properties section of the Video inspector, click the “Frame rate” pop-up
menu, then choose 29.97.
4. In the Quality section of the Video inspector, click the “Retiming quality” pop-up menu,
then choose Reverse Telecine.
5. If you’re modifying the setting of a specific job, click Start Batch to begin transcoding.
If you’re modifying a custom setting, there are no additional steps to take.
View and modify audio tracks in Compressor
QuickTime movies can contain multiple audio tracks, and those tracks can be configured
in multiple ways. In Compressor you can view these tracks, enable or disable them, and
reconfigure them into alternative formats, if necessary, to ensure they are correct in your
transcoded output files.
For example, a QuickTime movie might have an audio track with two channels erroneously
configured as a stereo pair. In Compressor, you can modify the track so the channels are
treated as two discrete mono channels, or as a specialized format such as 1.1 (center and
low-frequency effects).