Apple Motion 2 - Manual (Page 948)

948 Appendix B Video and File Formats
Choosing a Frame Rate
Most DVCPRO HD cameras and decks allow two types of video frame rates:
• Integer frame rates such as 60, 30, and 24 fps
• NTSC-related frame rate variants such as 59.94, 29.97, and 23.98 fps
Note: If you are outputting via Final Cut Pro, Motion only supports NTSC-related
timebases such as 59.94, 29.97, and 23.98 fps when transferring video between a
computer and a DVCPRO HD device via FireWire. Using tapes recorded with whole-
number frame rates such as 60 fps or 30 fps is not supported in Motion.
Popular Video Codecs for File Exchange
You can use video compressed with nearly any video codecs in Motion—DV or
DVCPRO, DVCPRO 50, DVCPRO HD, Uncompressed 8-bit 4:2:2, Animation, Apple M-
JPEG, and other third-party codecs. Bear in mind that when you are working on a
project in Motion, it is best to use high-quality codecs with a minimum of compression.
Highly compressed video files, such as those compressed using the MPEG-4 or
Sorensen codec, are probably going to be unsuitable for creating high-quality work.
Note: Motion works in the RGB color space. Any clips you use in Motion that were
captured or recompressed using a YCrCb codec, such as DV or Uncompressed 8-bit
4:2:2, are converted to the RGB color space when used in a Motion project. Clips that
are exported from Motion using a YCrCb codec are converted back into the YCrCb color
space.
Uncompressed 8-bit and 10-bit 4:2:2 video
Video stored using these codecs undergoes no data compression, but some color
resampling may occur depending on the source video format. Since compression
usually results in video artifacts, using no compression guarantees the highest level of
quality. Unfortunately, it also guarantees enormous file sizes.
Uncompressed movies can have an alpha channel. Alpha channels define levels of
transparency in your movie and are useful if you’re delivering an effects shot for use in
someone else’s composition.
Animation
The Animation codec was developed for computer-generated imagery, which often has
large areas of uniform color and little, if any, noise. It is a lossless codec, which means it
doesn’t degrade quality or add artifacts to your video when it applies compression.
Digital Betacam 95.2 Mbps 11.9 MB/sec.
D-1 172 Mbps 21.5 MB/sec.
Format Bits per second (video only) Bytes per second
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