From: Josh Vermaas (
Date: Wed Sep 03 2014 - 13:50:03 CDT

If you can't make your movie player slow down, you can always slow down
the movie itself. I know ffmpeg (a free library that converts video
files around) can do this quite trivially (google "ffmpeg adjust frame
-Josh Vermaas

On 9/3/14, 9:25 AM, Axel Kohlmeyer wrote:
> On Wed, Sep 3, 2014 at 3:33 PM, Dawid das <> wrote:
>> Dear VMD experts,
>> I have already solved this problem but not for GROMACS files.
>> I want to make a trajectory movie, but following frames appear to quickly
>> and it is very hard to actually see and analyze how chromophore structure
>> changes over time. So I want to make the movie last longer and the frames to
>> be be displayed for a longer timer.
>> I did it for Tinker trajectory snapshots by uploading the same snapshot 5 or
>> 7 times but how to do it with *gro and *trr files from Gromacs?
> that is a rather inelegant way of doing this.
> many movie player software allows to override the "fps" setting (fps =
> frames per second)
> with more advanced formats and converters like FFMpeg, you can also
> set the frames per second during compression. you may need to modify
> the command line for it, which is embedded in the vmd moviemaker
> plugin (which is a Tk/Tcl script plugin).
> axel.
>> Best wishes,
>> Dawid Grabarek