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330 Chapter 19: Video Post-Production
Other Scene Range options are disabled when
Lock To Video Post Range is selected.
To offset the scene in time:
• Select Lock Range Bar To Scene Range.
TheSceneStartcontrolisenabledbuttheScene
End control remains disabled: synchronization
is controlled by the Scene Start value and the
length of the range bar.
TheSceneStartvalueisthesceneframe
number where playback be gins. If Scene Start is
0, frame 0 of the scene is the first frame played
back; if Scene Start is 12, frame 12 is the first
frame to play, and so on.
The range bar length determines how many
frames of the scene to play. Dragging the end
point of the range bar changes the length of
the playback range. Although S cene End is
unavailable, its value updates to show the frame
number of the last scene f r ame that will be
played.
Dragging the range bar changes where the scene
is played within the final video. For example,
if you set Scene Start to 5 and move the range
bar to beg in at Video Post frame 20, f rame 5 is
played at f rame 20 of the final video, and so on.
To off set the scene and change scene pla yba ck ra te:
• TurnoffLockRangeBarToSceneRange.
WithLockRangeBartoSceneRangeoff,both
SceneStartandSceneEndareenabled. As
before, Scene Start specifies the first scene
frametoplay.SceneEndspecifiesthelastscene
frame to play, and the length of the range bar
determines playback speed.
If the r ange bar specifies the same number of
VideoPostframesastherearecorresponding
scene frames, then playback is at the scene’s
playback rate. If the range bar specifies
fewer frames, the scene is sped up. If the
range bar specifies more frames, the scene is
slowed down. When it executes, Video Post
automatically skips frames or adds frames to
control the speed of scene playback.
Forexample,ifSceneStartisframe5andScene
End is frame 35, the range bar represents 30
frames overall. If the range bar covers only 10
Video Post frames, scene playback is sped up to
fit30framesinto10ofthefinalvideo.Ifonthe
other hand, the range bar covers 120 frames,
scene playback is stretched to slow it down.
To r ender the ful l scene ba ck wards:
1.
Turn off Lo ck To Video Post Range .
2. Turn off Lock Range Bar To Scene Range.
3. Set Scene Start to the last frame in the scene.
4. SetSceneEndtothefirstframeinthescene.
Thelengthoftherangebaralsodeterminesthe
play back speed of the reversed scene.
To add scene motion blur:
1.
SelectSceneMotionBlurintheSceneEvent
dialog.
2. Set the scene motion blur p ar ameters.
The S cene event generates motion blur by
simulatingacamerawithanopenshutter.It
interpolates and then renders movement within
a frame, to generate a series of images of the
moving object, instead of the default single
image.
Interfa ce
TheAddSceneEventandEditSceneEventdialogs
havethesamecontrols.