Apple Cinema Tools 3 - Manual (Page 215)

Appendix B How Cinema Tools Creates Film Lists 215
About the Clip-Based Method
For Cinema Tools to locate a database record using the clip-based location method, it
needs to know only the relationship between the source clip and the key numbers or
ink numbers. In contrast, the timecode-based method depends on Cinema Tools
knowing the relationship between the key numbers or ink numbers and the video reel
and timecode. Because the clip-based method relies on fewer variables, it is more
reliable, which is why Cinema Tools tries to use this method first.
If you conform the frame rate of clips from 25 fps to 24 fps, Cinema Tools can rely only
on the clip-based method to locate records for film lists. The reason for this is that the
clip now has new timecode for its new frame rate, so the timecode-based method is
unreliable. You can see the new timecode in the editing system, where the frame
offsets in the timecode won’t always match the frame offsets in the window burn.
Note: The timecode-based method can be used after clips are reverse-telecined from
30 fps to 24 fps, because Cinema Tools tracks the original timecode in this case.
About the Timecode-Based Method
There are some situations in which the timecode-based method is useful or even
essential:
 If you have not logged clips in the Cinema Tools database by connecting them to
database records, then only the timecode-based method can locate the database
records. If the database contains the data that is needed to match the edge code and
the timecode, and if the source clips were captured by Final Cut Pro using frame-
accurate device control, Final Cut Pro should know which video reel and timecode
goes with each clip and a film list can be produced from this information. (In such a
case, you do not have to connect the source clips to the database records, saving you
a fair amount of labor.)
 If you are generating a film list from an external EDL, the timecode-based method is
used (assuming you have not connected the source clips to the database).
 If the clip files are inaccessible (offline) when the film list is generated, only the
timecode-based method can locate the database records.
UP01101.Book Page 215 Thursday, March 10, 2005 3:16 PM