Smoothing slow motion using motion blur – Apple Final Cut Pro 6 User Manual
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Chapter 17
Changing Clip Speed and Time Remapping
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Note: While clips using frame blending can play in real time at preview quality, frame
blending on a field-per-field basis is much more processor-intensive and is only
performed when the clip is either rendered or played via a third-party video interface
with real-time hardware processing that’s capable of field blending.
You can make a clip play backward by selecting the Reverse option. Alternatively, you
can enter a negative speed setting.
Note: Frame blending and reverse speed can be applied to both constant and variable
speed clips.
Smoothing Slow Motion Using Motion Blur
Although using frame blending is an excellent way to smooth out the apparent
motion of a slow-motion clip, extremely slow speeds such as those below 20 percent
can still result in strobing. To further minimize this effect, you can use the Motion Blur
attribute in the Motion tab.
Drag the Samples slider to the right until you achieve the amount of blur you need to
cover the strobing of your clip (the higher the Samples setting, the longer rendering
takes) and then adjust the % Blur setting until you strike a good compromise
between the sharpness of the clip and the smoothness of the motion.
Note: Motion Blur is not a real-time effect and in fact can be quite render-intensive at
its higher settings. For this reason, you may find it best to adjust the speed and
duration of your clip with Motion Blur turned off, turning it on again only for the final
render. To turn off Motion Blur without individually removing it from every clip, you
can deselect the Motion Blur checkbox in the Render Control tab of the Sequence
Settings window. For more information on using the Render Control tab, see “