Apple Final Cut Pro 5 - Manual (Page 1601)

250 Part III Output
Standard Video Compression Settings
Depending on the codec you choose from the Compression type pop-up menu,
various options may be available, as explained below.
 Compression Type: Select a codec from this pop-up menu to compress the video. All
the standard Final Cut Pro and third-party video codecs installed on your system are
available.
Motion
 Frame Rate: Define the frame rate of your exported movie. This doesn’t need to
match the frame rate of the clip or sequence you’re exporting. However, the file
quality is improved if your new frame rate is evenly divided into the original one.
 Key Frames: These options are available if your selected codec uses temporal
compression. Increasing the number of frames between keyframes increases the
amount of compression and makes the final file size smaller.
Depending on the codec you use, the movie file’s quality, especially for clips and
sequences with a lot of motion, may decrease if there are too few keyframes
specified. A setting of one keyframe every ten frames is a good starting point.
 Automatic: QuickTime adds temporal compression keyframes when necessary.
 Every N frames: Temporal compression keyframes are created every N frames. Since
keyframes require more data to store than the in-between frames, a higher value
here results in a movie with a lower data rate.
 All: A keyframe is added on every frame. This increases the data rate of the
movie significantly.