4.2

different than 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, then select “So source frames
play at 25 fps” in the General inspector, the duration of the
transcoded clip (at 25 fps) is 9 seconds and 15 frames.
For more information, see .
Video properties
Frame size: Use the pop-up menu to set an automatically
calculated frame size ( ) range for the output file. For
more information, see .
Pixel aspect ratio: For settings that use the H.264 format, the
pixel aspect ratio is set to Square.
Frame rate: Use this pop-up menu to set the playback rate
(the number of images displayed per second) for the output
file. For more information, see .
Field order: For settings that use the H.264 format, the field
order is set to Progressive (complete frames are scanned).
Multi-pass: Select this checkbox to turn on multi-pass
encoding that uses additional analysis of video frames to
produce a high-quality output file. For faster (single-pass)
transcoding, turn this feature off by deselecting the checkbox.
Bit rate: Select the Automatic checkbox to have Compressor
calculate the appropriate for the output file, based on
the frame size of the source file and device compatibility. If
the checkbox is not selected, you can set the bit rate by
dragging the slider or entering a value in the text field.
Retime video and audio
resolution
Modify frame size overview
Frame rate options overview
bit rate