From: Axel Kohlmeyer (
Date: Wed Sep 20 2006 - 14:00:56 CDT


most likely your ppmtompeg executable is broken.
there was a phase where netpbm contained a broken
version, and many (linux) distributions were shipping it.
you may want to update that package (or at least replace
the ppmtompeg command with a newer version).


On 9/20/06, Kenley Barrett <> wrote:
> Dear VMD community,
> I am trying to make an mpg movie out of an AMBER trajectory using VMD. I
> have done this before without difficulties; however, for some reason with
> this trajectory it is not working. No error messages are displayed but at
> the end of the process there is no .mpg file. This is the message in the
> console at the end of the movie generation process:
> Info) Rendering current scene to
> '/tmp/plug_sim_an15_500_mid.0499.ppm' ...
> Info) Rendering complete.
> No frame format conversion necessary, continuing.
> Converting frames to MPEG-1 video format
> ppmtompeg /tmp/plug_sim_an15_500_mid.par
> Cleaning generated data, frames, and encoder parameter files
> Movie generation complete.
> I would be very grateful for any suggestions on what I might be doing wrong.
> Thank you in advance for your help.
> Kenley Barrett

Axel Kohlmeyer
  Center for Molecular Modeling   --   University of Pennsylvania
Department of Chemistry, 231 S.34th Street, Philadelphia, PA 19104-6323
tel: 1-215-898-1582,  fax: 1-215-573-6233,  office-tel: 1-215-898-5425
If you make something idiot-proof, the universe creates a better idiot.