Pentax Optio RS1000 Operating Manual page 154

8
Press the 4 button.
A confirmation dialog appears.
9
Use the four-way controller (23)
to select [Divide].
10
Press the 4 button.
The movie is divided at the specified position, the two portions are
saved as new files, and the original one is deleted.
The protected movies cannot be divided.
5
152
Divide at this position? Divide at this position? Divide at this position?
Divide
Cancel
OK
OK OK OK