Finding and Marking Long Frames
Long frames are frames with nonstandard frame durations that can occur within a clip
as a result of a problem during capture. You might have long frames in your program
for several reasons. Regardless of why there are long (dropped) frames, you need to
know where they are so you can either prevent them or work around them.
A still image in a movie that’s been made to be deliberately longer than one frame is
also a long frame. Long frames of this type may occur in movies created with one of
the many QuickTime authoring programs. For example, if you use QuickTime Player to
insert a still image with a duration of more than one frame into a movie, that frame is
considered a long frame.