Hi Andrew, I don’t know how you are looping, but if I use View… Loop in Quicktime Player, I don’t see any pause in the movie created with command script: movie record rock y 10 68;wait rock y -10 68; wait movie stop movie encode ~/Desktop/test.mov … also your commands are a little weird because rock will already change direction, so you get an identical movie by running a full cycle of rocking, e.g.: movie record rock y 10 136;wait movie stop movie encode ~/Desktop/test2.mov If you are using some other method of looping, maybe it is repeating the end frames. I don’t know if this “View… Loop” display in Quicktime Player goes from the 136th to the first or assumes they are the same and goes to the second instead. Best, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Jun 14, 2017, at 5:38 AM, Andrew Oliver, II <aoliver2@hotmail.com> wrote:

Dear Chimera, I am trying to create a "rocking" movie of a molecule that will continuously loop. I am using the command:

movie record; rock y 10 68; wait; rock y -10 68; wait; movie stop; movie encode

However, when I do this, there is always a slight pause at the end of the movie, before it starts the next loop -- which means it doesn't loop smoothly.

Is there a way to create the movie so that there will be no pause before each successive loop?

Many thanks, Andrew Oliver