VMD-L Mailing List

From: xiaoqin huang (xqhuang1018_at_msn.com)
Date: Mon Jun 04 2007 - 11:43:13 CDT

another two questions:
1)how to add text label for the title of the movie?
2)how can I polish the snapshots when generating ppm files?
thanks for help.

xiaoqin

06/04/2007

>From: John Stone <johns_at_ks.uiuc.edu>
>To: Kailee <kaileeamber_at_googlemail.com>
>CC: vmd-l_at_ks.uiuc.edu
>Subject: Re: vmd-l: question about making movies
>Date: Wed, 16 May 2007 14:44:17 -0500
>
>
>Hi,
> The display rate of VMD is limited by the speed of your graphics
>board (GPU). The display rate of the movie is set by the video encoder,
>and in the case of standard PAL and NTSC movie formats, this is either
>24, 25, 29.97, or 30 frames per second. The movie maker plugin for VMD
>uses 24 FPS when encoding MPEG movies, so presumably the large speed
>difference
>you observed in the rate of movie playback versus what you see in VMD just
>indicates that when you're displaying interactively in VMD, that your
>graphics card is only achieving something on the order of 8 FPS.
>If you had a 500 frame trajectory, the longest that movie can run
>with no duplication of video frames, is just over 20 seconds, assuming
>you encoded it as an MPEG movie with the normal 24 frames per second rate
>that the plugin uses by default. Can you verify that your movie contains
>all 500 frames? (mplayer and/or other movie player tools can tell you
>how many frames are in the movie, the frame rate, etc)
>
>Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
>
>On Wed, May 16, 2007 at 05:49:50PM +0100, Kailee wrote:
> > Dear VMD users,
> >
> > I am trying to use VMD to make movie from AMBER trajectory files after
>MD, I
> > can make a movie using the movie generator in VMD, however, I found that
>the
> > atom moves much faster than that viewed using VMD. For example, I have
>500
> > frames in total, and when I use VMD to view this trajectory, it cost
>about
> > 40 seconds to finish from frame 1 to frame 500, but when I set the movie
> > duration as 40 seconds in the movie generator, it is actually within
>only 10
> > seconds to go from frame 1 to frame 500, therefore in the 40 seconds
>movie I
> > have made, it played 4 times the trajectory and all the atoms move much
> > faster. Can anyone tell me what's wrong with this and how should I make
>a
> > right movie?
> >
> > Thank you for any suggestion.
> >
> > Kailee
>
>--
>NIH Resource for Macromolecular Modeling and Bioinformatics
>Beckman Institute for Advanced Science and Technology
>University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
>Email: johns_at_ks.uiuc.edu Phone: 217-244-3349
> WWW: http://www.ks.uiuc.edu/~johns/ Fax: 217-244-6078

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