Apple Motion 5.1.1 - Manual (Page 248)

Chapter 7 Basic compositing 248
If you play back the project before the analysis is complete, the clip will appear as if Frame
Blending is set to None. When the analysis is complete, the indicator disappears, and the clip
will play back properly. You can view more detailed information about the clip analysis and
stop the process before it is finished. You can perform optical flow analysis on multiple clips
simultaneously. The clips are processed in the order—the first clip you apply optical flow to is
processed first, and so on.
Note: The more motion contained in a clip, the longer the analysis takes.
For information on pausing, reordering, or stopping a clip analysis, see
Manage retiming
analysis on page 248.
Important: When importing interlaced footage and using the Optical Flow method for frame
blending, be sure the Field Order parameter (in the Media Inspector) is assigned to the correct
value. Otherwise, artifacts may appear in the retimed layer.
•
End Condition: A pop-up menu that lets you set how playback continues when the end of the
clip is reached. There are four options:
•
None: The default setting. The layer’s duration in your project is equal to the duration of its
source media file.
•
Loop: When the last frame of the clip is reached, the clip loops back to the first frame
and plays again. This can cause a jump in the clip’s apparent playback unless the clip was
designed to loop seamlessly.
•
Ping-Pong: When the last frame of the clip is reached, the next iteration of clip playback is
reversed. If you set a clip of a ball rolling on the floor to loop with the Ping-Pong option,
it would appear to roll forward, then backward, then forward again for the duration of the
layer. The Ping-Pong option lets you extend the duration of some video clips more smoothly
than the Loop option.
•
Hold: This option freezes the last frame of the clip for the amount set in the End
Duration slider.
Note: When using the Hold option with interlaced footage, ensure that field order is properly
set in the Media Inspector. To modify a clip’s field order, select the clip in the Media list, then
choose an option from the Field Order pop-up menu in the Media Inspector.
•
End Duration: A slider that lets you set the number of frames by which the clip is extended at
the end of its duration. This value can be adjusted only if End Condition is set to a value other
than None.
Manage retiming analysis
You can display processing information when retiming a clip.
Display more information about ongoing clip analysis
Do one of the following:
m Choose Window > Show Task List.
m Click the analysis indicator (in the lower-left corner of the Canvas, beside the Play/Mute audio button).
Analysis indicator
67% resize factor