VMD-L Mailing List

From: anu chandra (anu80125_at_gmail.com)
Date: Thu Dec 31 2015 - 06:34:57 CST

Hi Josh,

Many thanks for your prompt reply. Though I could use ffmpeg to reencode
the image to movie, I just wonder if there is a way I can play around in
ffmpeg to improve the image quality.

I have noticed that, though the image quality is relatively good while
rendering from VMD, it gets reduced while making a movie using ffmpeg. As
you suggested I just used the ffmepg command ' ffmpeg -i frames-%05d.tga
output.mp4 ' for generating the movie.

Thanks in advance
Anu

On Wed, Dec 30, 2015 at 1:17 AM, Josh Vermaas <vermaas2_at_illinois.edu> wrote:

> Hi Anu,
>
> It sounds like you are using the movie maker plugin. What I found was that
> the default encoder settings left alot to be desired, and as a result the
> animations that came out were not as aesthetically pleasing as I would have
> liked. What I would do is to turn off the setting in the movie maker that
> deletes the images automatically afterward, and then reencode the images
> into a movie afterward using the rendered images using ffmpeg so I could
> set the balance between filesize and image quality myself. A basic example
> of the command would be:
>
> ffmpeg -i frames-%05d.tga output.mp4
>
> Alternatively, for simple trajectory animations, you could write a simple
> rendering script in VMD and not use the movie maker altogether:
>
> for { set f 0 } { $f < [molinfo top get numframes] } { incr f } {
> animate goto $f
> render snapshot [format "frames-%05d.tga" $f]
> }
>
> -Josh Vermaas
>
>
> On 12/29/2015 06:05 PM, anu chandra wrote:
>
> Dear VMD users,
>
> I am trying to make a movie of simulation trajectories. Though I could
> make the movie successfully,I have noticed while watching the movie in a
> media player that the movie clarity has drastically came down as compared
> the trajectory visualized in the OpenGL window of VMD. I just wonder is
> there any way I can improve the clarity of movie made with VMD.
>
>
> Many thanks in advance
>
> Anu
>
>
>