Apple Compressor (4.1.2) - Manual (Page 73)

Chapter 5 Advanced tasks 73
When using the reverse telecine feature in Compressor, consider these issues:
•
Because of the unpredictable nature of the processing when reversing the telecine,
segmented encoding does not work as efficiently as it does when reverse telecine is not
being used.
•
If you pause the transcoding process, the transcode must start from the beginning when you
restart it.
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 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, choose 29.97 from the “Frame rate”
pop-up menu.
4 In the Quality section of the Video Inspector, choose Reverse Telecine from the “Retiming quality”
pop-up menu.
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.
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