Autodesk 64006-051108-9001 - Discreet Cleaner - Mac User Manual page 195

Video Length
Use this formula to calculate the length of your video in seconds:
where,
videolength is the duration of the video in seconds
hh, mm, and ss represent the hours, minutes, and seconds of the video length
When performing these calculations, do not forget to reserve enough space for the other
components of your project.
For example, a Director projector, ReadMe and installers might take 50 MB of the CD, leaving
you only 600 MB for video. If you want to put two hours of video on a 4x CD, and your other
project files are 50 MB, the data rate you must use is about 85 KBytes/sec or less
(the CD 614,400 KB divided by 7,200 seconds equals 85.3 KBytes/sec).
Minimum Target CPU Speed
Most streaming codecs, such as the QuickTime Sorenson Video and Windows Media Video, are
very CPU intensive. When using these codecs the limiting factor for the data rate may be the
minimum system on which you want the video to play and not the connection speed or amount
of video you need to fit on a disk.
For example, the Sorenson Video codec can produce very high-quality video at CD-ROM data
rates. But, as the data rate increases, the playback requirement also increases, so it is possible to
produce higher-data rate movies that do not play smoothly on the minimum target CPU.
For example, a 30 KBytes/sec Sorenson Video-encoded QuickTime movie plays well on any
PowerMac or Pentium computer, but a 300 KBytes/sec Sorenson Video movie requires a fast
computer to play smoothly. The latest Windows Media Video codec has similar playback
requirements.
Testing your material on the minimum target computer is important when using these newer,
more CPU-intensive technologies.
( ×
videolength hh 3600
=
) ( × )
mm 60 ss
+ +
Encode Tab 187