When this option is checked, SpotRemover will attempt to detect duplicate
(repetitive) frames.
If a duplicate frame is detected it does not go into the processing.
At the output, the corresponding frame is made as an exact copy of the preceding
processed frame, thus keeping the frame rate unchanged.
This effectively enables spot detection in repetitive frames, and can be used
for processing the video sequences originated from video sources with
lower frame rate.
One examlple is 8 mm film projected at 18-20fps and
captured with PAL/NTSC camcorder.
Do not use this option if your video was telecined. (Read details here.)
Turn this option on only if you really need to, as this slows down the processing.