# Optical Flow
For most videos, use the default free options is enough. If you have special requirements for quality, please refer to the options below.
# HD
By turning on this option, you can get higher resolution result, but it takes much more time.
# DeNoise
This option can reduce noises, but it can also inrease ghost trails.
# DeGhost
This option can reduce ghost trails caused by fast moving objects, but it can also increase noises.
# Remove Duplicate
If there are repeated frames in the video, the result will be choppy. After turning on this option, repeated frames can be automatically removed to keep the result smooth.