4.5

32Compressor User Guide
The properties of Apple Devices settings are located in the General, Video, and Audio
inspectors (described below).
Setting summary
Displays the setting name and transcoding format, as well as an estimated output file
size. When you add a setting to a job or change the setting’s properties, Compressor
automatically updates this summary.
General properties
• Name: Displays the name of the setting.
• Description: Displays the description of the setting.
• Extension: Displays the extension of the output file (.m4v).
• Allow job segmenting: If you’ve set up distributed processing, select this checkbox
to have Compressor process the output file using your shared computer group. See
Transcode batches with multiple computers using Compressor.
• Default location: Choose an item from the pop-up menu to set the default save location
for transcoded files.
• Format: Use this pop-up menu to specify whether the output includes video and audio,
video only, or audio only.
• Optimize for network use: Select this checkbox to create a file that will start playing
after only a small portion of the file has been downloaded from the network.
Retiming
Sets the processing algorithm used to adjust the frame rate during transcoding. Select one
of the following options:
• Set to percent of source using: Modifies the output clip’s speed by a percentage of the
source clip’s speed. Enter a value in the percentage field or choose a preset value from
the adjacent pop-up menu (with a down arrow).
• Set to: Sets the duration of the clip. Enter a timecode duration in the field or click the
arrows to increase or decrease the time.
• So source frames play at [frame rate] fps: Nondestructively changes the playback
speed of the clip without discarding frames or creating new frames. This property has
no effect unless the “Frame rate” value in the Video inspector is different from the
source file’s frame rate. For example, if you add a 10-second source file with a frame
rate of 24 fps to Compressor, set the “Frame rate” property in the Video inspector to
25 fps, and then select “So source frames play at 25 fps” in the General inspector, the
resulting duration of the transcoded clip (at 25 fps) will be 9 seconds and 15 frames.
For more information, see Retime video and audio using Compressor.
Captions
This area in Compressor contains a single property, the “Embed closed captions” checkbox.
Select the checkbox if you’ve added CEA-608 closed captions to a job and you want the
captions inserted into the output video file. See Intro to supporting captions in Compressor.