Scripting makes this an EASY proposition. For example, Excalibur has the Four Points tool which will, essentially, do exactly what you are wanting. Create a selection area where you want the image frozen, run the tool, and it will create 4 nodes on the velocity envelope. You can then drag the center section down to 0%
Alternately, It also has a “freeze at cursor” option (technically it’s a “change to specified velocity at the cursor” option). It could then be used again to change back to normal speed.
There’s a “Four Points” tool available at: https://www.jetdv.com/scripts/FourPoints.js but it is set up to work with a Volume envelope. A modification would be required to get it to work with a Velocity envelope.
In my opinion, the velocity envelope is the best way to handle this type of thing.
Edward Troxel
