Lip Sync 3 synchronizes the visible mouth movement in an existing video region to a selected audio source.
In Kepler, the input video is the rendered Region Selection from the timeline, so trims, cuts, transforms, overlays, speed changes, and visible track state are preserved. Audio can come from the same Region Selection or from a picked audio/video clip. The result is saved as new video media and placed above the original region without overwriting source clips.