This does exactly the same thing as ReframeRT in Stretch mode. It multiplies the output frame number by the scale factor to arrive at the input frame number and changes the length of the sequence. Unlike ReframeRT, this must run from the Video menu and render its output. Be aware Reframe does not write the scaled frame rate as the frame rate of the rendered file. It produces a file of scaled length and equal frame rate as the project. The new length is as big as the original sequence.
To create a slow-motion of fast moving video:
The CINELERRA-GG Community, 2021