Apple Final Cut Pro 7 - Manual (Page 1480)

Issues When Working with Mixed Frame Rates
When you add a clip to a sequence and the frame rates don’t match, Final Cut Pro places
the clip as accurately as possible in the Timeline. However, because of the differences
between some frame rates, there may be a one-frame shift on either the In or Out point
of the clip. This is normal behavior caused by the limitations of mixed-frame-rate editing.
After you add a nonmatching clip to a sequence, always check to make sure your clip In
and Out points appear the way you want, and adjust them if necessary.
Copying and pasting clips from one sequence to another can also create mixed-frame-rate
scenarios. Frame rate errors can accrue if you repeatedly copy sequence clips to new
sequences with nonmatching frame rates. When possible, it’s always better to edit with
master clips from the Browser instead of dragging clips between sequences.
Motion has a different frame repeating and frame skipping pattern than Final Cut Pro, so
you may see different frames repeated than expected when including Motion projects
in a Final Cut Pro sequence.
Working with Subclips in Mixed-Frame-Rate Sequences
In cases where a subclip’s frame rate and a sequence’s frame rate do not match, adding
the subclip to the sequence may cause the subclip limits to be adjusted and new clip In
and Out points to be set. These adjustments ensure that the edit you perform has the
starting and ending frames you would expect.
You can verify that the subclip limits have been adjusted by comparing the following
Browser columns before and after you add a subclip to a sequence with a nonmatching
frame rate:
• Media Start
• Media End
• In
• Out
If any of these clip properties are adjusted when you perform an edit with a subclip,
Final Cut Pro displays a dialog to notify you.
Combining Interlaced Footage with Different Field Dominances
Field dominance determines the order in which fields are scanned on an interlaced
monitor (such as an NTSC, PAL, or interlaced HD monitor). If a format uses Upper (Odd)
field dominance, the first field scanned (called field 1) is made up of the odd lines in the
video frame. Lower (Even) field dominance scans the even lines first.
1480 Chapter 86 Working with Mixed-Format Sequences