Graphics Programs Reference
In-Depth Information
What you have effectively done is place a filter on a clip in the Timeline and
mark three keyframes to it. The first and second keyframes are marked with
the filter set to zero, thus it has no effect on the clip - this ensures when the
clip plays, initially there is no visual change to its appearance. The third
keyframe is added where the filter settings are adjusted to bring the clip out of
focus. Thus when the clip plays, initially it is in focus until the third keyframe
where it moves out of focus. This is a simple and easy way to simulate a pull
focus.
By using the above method you can keyframe many of the filters found under
the Effects tab. For example, you could keyframe a clip so that the appearance
changes from full color to black and white - or vice versa. You could keyframe a
clip using the Fisheye filter so that it appears normal and over time changes as
if it is being distorted by an extreme wide angle lens. The possibilities are
endless. Through keyframing one has access to powerful tools to change the
look, shape and feel of clips.
Time Remapping
Time Remapping is an easy and effective technique for performing what is
called 'ramping' of speed. You can 'ramp' from slow to fast, fast to slow, slow to
fast to slow, and into reverse or forwards motion at will.
In essence to work with the Time Remap feature is not difficult. It involves
setting keyframes and moving these keyframes to create a shift in time, within
the confines of the overall length of the clip. It is important to understand
when using this function that the overall duration of a clip remains exactly the
same. When slowing down or speeding up clips using the conventional speed
modifier, found under the Modify menu, the duration of a clip is made longer
for slow motion or shorter for fast motion. When using Time Remap the clip
stays the same in length, it is the motion within the start and end points of the
clip that are affected.
