[Chimera-users] movie frame rate

[Elaine Meng]

Hi Ahmad,
I already answered this question in the previous reply!

Again, if your goal is to make a recorded movie file, use one or both of the following:

(1) you control framerate in a recorded movie file with “movie encode” command option “framerate”.   There is no Chimera command option tthat acts like the MD Movie dialog’s faster-slower slider, and “perframe” doesn’t do it.

(2) go back and create the morph trajectory with more steps in it, e.g. spread the motion across 200 steps instead of 20.

If you are NOT making a movie file and you only care about interactive playback, there is “set maxframerate” (this is different than what the MD Movie slider does), but it will have absolutely no effect on the speed of a recorded movie file.

set maxFrameRate
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/set.html#maxframerate>

discussion of frame rate and movie speed
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/movies.html#speed>

Best,
Elaine
-----
Elaine C. Meng, Ph.D.
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Sep 26, 2018, at 9:37 PM, Ahmad Khalifa <underoath006 at gmail.com> wrote:
> 
> Thanks Elaine. I meant the framerate of the molecular movie not the movie that I'm recording. In the molecular movie window, there's a slider that goes from slow to fast. I want to be able to control the speed from the command line as well.
> 
> Coordset plays the frames from 1 to 21 at the fastest speed. I tried to experiment with the perframe command but couldn't quite get it right. How can I use perframe to play the movie and introduce a wait of a few milliseconds in between frames thus controlling the speed of the molecular movie?
> 
> Best regards. 
> 
> On Wed, Sep 26, 2018, 5:19 PM Elaine Meng <meng at cgl.ucsf.edu> wrote:
> Hi Ahmad,
> Sorry no.  However, in general movie framerate is not the same as when you are running Chimera, and movie framerate can be controlled with the framerate option of the “movie encode” command.
> <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/movie.html>
> 
> In our newer program ChimeraX (where most development effort is now), “coordset” does have a “pauseFrames” option to slow down playback:
> <http://rbvi.ucsf.edu/chimerax/docs/user/commands/coordset.html>
> … but it is not implemented in Chimera “coordset”:
> <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/coordset.html>
> 
> In Chimera. other than just having a slower movie framerate as mentioned above, to show the morph more slowly you would need to create the morph trajectory with more frames.
> 
> I hope this helps,
> Elaine
> 
> > On Sep 26, 2018, at 10:46 AM, Ahmad Khalifa <underoath006 at gmail.com> wrote:
> > 
> > Thank you so much, is there a way to set the frame speed with coordset?