OK, I have now used the following script to process the movie clip :-
v=QTInput("MVI_7088.mov", color=2, audio=0)
fps=v.FrameRate()
v1=v.Trim(200,305)
v2=v.Trim(314,371)
v3=v.Trim(500,3170).AutoCrop(0,wMultOf=16,hMultOf=16).ConvertToYV12()
v4=v.Trim(3431,3610)
v1=v1.AssumeFPS(fps/4).ConvertToYV12()
v1=v1.AutoCrop(0,wMultOf=16,hMultOf=16).MSU_FRC(4,"fast")
v2=v2.AssumeFPS(fps/4).ConvertToYV12()
v2=v2.AutoCrop(0,wMultOf=16,hMultOf=16).MSU_FRC(4,"fast")
v4=v4.AssumeFPS(fps/4).ConvertToYV12()
v4=v4.AutoCrop(0,wMultOf=16,hMultOf=16).MSU_FRC(4,"fast")
v=v1+v2+v3+v4
return v
It cuts-out unwanted parts, including the static frames as zoom changes from optical to digital.
The zoom-in and zoom-out are slowed down by a factor of 4x.
The panning of the scene is at normal speed.
(the pan has to be so slow at such a high magnification you cannot see the camera rig rotating)
