Changing MD trajectory default frame rate
Dear all, Is there a way to change frame rate when I hit that red "record" button when playing MD trajectory?
I could do "movie record", but then it becomes interactive (I hit triangle "play", and then "movie encode /Users/visvaldas/Desktop/movie.mp4 framerate 5"), so inadvertently can record some undesired frames.
Of course I probably can reduce framerate using external programs, but how to that non-interactively in ChimeraX?
Best regards, Vis
Hi Vis, You should use the "coordset" command to play back the trajectory (not the GUI play button) and put it into a command script file along with the "movie" commands. You can also include other commands in your script if you want other things to happen in the movie.
See "movie" and "coordset" commands: https://rbvi.ucsf.edu/chimerax/docs/user/commands/movie.html https://rbvi.ucsf.edu/chimerax/docs/user/commands/coordset.html
See the "making movies" page: https://rbvi.ucsf.edu/chimerax/docs/user/movies.html
See the ChimeraX morphing highlight, which includes the command script used to record the morph trajectory (same approach would be used to record an MD trajectory): https://www.rbvi.ucsf.edu/chimerax/features.html#morphing
More about command scripts (.cxc. files): https://rbvi.ucsf.edu/chimerax/docs/user/commands/usageconventions.html#cxc-files
I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco
On Jan 12, 2023, at 12:10 PM, Visvaldas K. via ChimeraX-users chimerax-users@cgl.ucsf.edu wrote:
Dear all,
Is there a way to change frame rate when I hit that red "record" button when playing MD trajectory?
I could do "movie record", but then it becomes interactive (I hit triangle "play", and then "movie encode /Users/visvaldas/Desktop/movie.mp4 framerate 5"), so inadvertently can record some undesired frames.
Of course I probably can reduce framerate using external programs, but how to that non-interactively in ChimeraX?
Best regards,
Vis
Hi Vis,
The ChimeraX daily build has a speed control on the MD slider panel (thanks to Eric Pettersen). If you record with that setting slower speed it will play back at slower speed. That speed control says how many rendered graphics frames are show for each MD time. So if you set it to 10 then it will run 10 times slower than the default value where it is set to 1. When the movie is recorded with the record button it always sets the playback speed as 25 frames per second in the .mp4 file. But the same MD time is repeated for 10 frames so it runs slower. You may think that will produce a bigger movie file, but it does not, because of the H264 compression used for the movie.
Tom
On Jan 12, 2023, at 12:10 PM, Visvaldas K. via ChimeraX-users chimerax-users@cgl.ucsf.edu wrote:
Dear all,
Is there a way to change frame rate when I hit that red "record" button when playing MD trajectory?
I could do "movie record", but then it becomes interactive (I hit triangle "play", and then "movie encode /Users/visvaldas/Desktop/movie.mp4 framerate 5"), so inadvertently can record some undesired frames.
Of course I probably can reduce framerate using external programs, but how to that non-interactively in ChimeraX?
Best regards,
Vis _______________________________________________ ChimeraX-users mailing list ChimeraX-users@cgl.ucsf.edu Manage subscription: https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users
Hi Vis,
I just added another way to control the movie playback speed when you record a movie with the red button on the MD coordinate set slider. You can create a new slider panel with the "coordset slider" command and specify the playback speed of the recorded movie file, for example,
coordset slider #1 movieFramerate 5
The default frame rate for the recorded movie if none is specified is 25. This will be in tomorrow's (January 13, 2023) ChimeraX daily builds.
Tom
On Jan 12, 2023, at 12:40 PM, Tom Goddard via ChimeraX-users chimerax-users@cgl.ucsf.edu wrote:
Hi Vis,
The ChimeraX daily build has a speed control on the MD slider panel (thanks to Eric Pettersen). If you record with that setting slower speed it will play back at slower speed. That speed control says how many rendered graphics frames are show for each MD time. So if you set it to 10 then it will run 10 times slower than the default value where it is set to 1. When the movie is recorded with the record button it always sets the playback speed as 25 frames per second in the .mp4 file. But the same MD time is repeated for 10 frames so it runs slower. You may think that will produce a bigger movie file, but it does not, because of the H264 compression used for the movie.
Tom
On Jan 12, 2023, at 12:10 PM, Visvaldas K. via ChimeraX-users chimerax-users@cgl.ucsf.edu wrote:
Dear all,
Is there a way to change frame rate when I hit that red "record" button when playing MD trajectory?
I could do "movie record", but then it becomes interactive (I hit triangle "play", and then "movie encode /Users/visvaldas/Desktop/movie.mp4 framerate 5"), so inadvertently can record some undesired frames.
Of course I probably can reduce framerate using external programs, but how to that non-interactively in ChimeraX?
Best regards,
Vis _______________________________________________ ChimeraX-users mailing list ChimeraX-users@cgl.ucsf.edu Manage subscription: https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users
ChimeraX-users mailing list ChimeraX-users@cgl.ucsf.edu Manage subscription: https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users
participants (3)
-
Elaine Meng -
Tom Goddard -
Visvaldas K.