[Chimera-users] making slow movie
goddard at cgl.ucsf.edu
Thu Apr 16 11:11:17 PDT 2009
As Elaine said increasing the bitrate is the most direct way to
better movie quality. The value is in Kbits/sec and default is 2000,
and 6000 is better but produces a movie file 3 times bigger. Also the
supersample option can be set to 3x3 to produce smoother lines and edges
with no increase in file size.
Elaine Meng wrote:
> Hi Bala,
> Now to your question #2. The short answer is no. However, there are
> some possible approaches, requiring various levels of effort:
> (A) If it is OK if the two playbacks are not exactly synchronized
> (don't need frame 1 and frame 1 together, 2 and 2, etc.), you can
> just open the two files by starting MD Movie twice. Then you will
> have two playback controllers. For testing, I used NMR ensemble PDB
> entries 1g1p and 1g1z. These have 18 structures each. While just
> showing one frame of each (not playing through the frames), I used "mm
> #0 #1" to fit them into the same orientation. Then I resized the
> Chimera window to make it longer horizontally and moved one model to
> the left and the other to the right. Something like these commands
> (using version 1.4, a daily build):
> move x -13 models #0
> move x 13 models #1
> Of course, you would also set colors, display styles, etc. as you want
> for the movie. Because these two structures are the same size, they
> play back at about the same speed if I put the two "Playback speed"
> sliders in the same place. I put both at the far left. If your two
> structures don't play back at nearly the same speed, move the sliders
> to try to make them update at the same rate. Now play back
> continuously for one ensemble. For the other one, stop the playback,
> choose File... Record movie and proceed as you have been doing. The
> movie will step through that ensemble, and the other one will just
> happen to be changing at the same time. Tada! I will send you the
> Quicktime movie from my test in a separate message.
> (B) If you need frame 1 with 1, 2 with 2, etc. it is much more
> effort. I can think of two different routes.
> (1) just open one ensemble and record with MD Movie, using
> recording options to control the name and location of the saved image
> files and the encoding option to keep those files rather than deleting
> them after encoding a movie. Do the same for the other ensemble.
> Then with some separate image-processing program combine the first
> image from each into a new first image with both side by side, etc.
> for the whole set of saved images. Then encode the new set of
> combined images into a movie. This would need to be done outside of
> Chimera, but I believe you could use the software embedded in Chimera
> to do it. I think the Reply Log shows what command is being used to
> encode the movie and you could use an analogous command in your system
> shell or terminal to do it. I haven't done this myself, however.
> (2) instead create a combined PDB file where each MODEL has both
> structures side by side. First you'd have to open the two files in
> Chimera, do any fitting and moving as described in (A), then save PDB
> for one ensemble "relative to" the other model. Then there would be a
> lot of painful editing to combine the coordinates into one multi-MODEL
> file. It would probably require renumbering so that there are not
> duplicate residues within a single MODEL. Then open that new file
> with MD Movie as a single trajectory, proceed with recording a movie.
> As for #3, I am not expert in this area. My general impression is
> that you could start with the default settings. If that does not look
> as nice as you want, you could try increasing the bitrate in the
> encoding options. It is always a trade-off of size and quality,
> however (nicer looking -> bigger file).
> I hope this helps,
> Elaine C. Meng, Ph.D. meng at cgl.ucsf.edu
> UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
> Department of Pharmaceutical Chemistry
> University of California, San Francisco
> On Apr 16, 2009, at 3:32 AM, Bala subramanian wrote:
>> I am using MD movie with chimera to see the motion of a single pdb
>> containing 25 models. I kept the play back speed at low value, then
>> recorded the movie. But the movie comes very fast. I guess there is
>> no related functionality between playback speed and the speed with
>> which the movie is recorded.
>> 1) How can i record a movie with low playback speed.
>> 2) Is it possible to split the chimera screen in to two halfes or as
>> quadrants (like in sybyl) and then load the molecules wherever we
>> Now why i need it ?.
>> I have two pdb files (each consisiting of 25 models). If i can
>> split the chimera screen, i would like to load pdb1 left and pdb2 in
>> rigth side using MD movie, then record the movie. Any better idea
>> than this to achieve the same would be highly appreciated.
>> 3) Kindly suggest me some better setting to record a movie with high
>> clarity based on your experience.
> Chimera-users mailing list
> Chimera-users at cgl.ucsf.edu
More information about the Chimera-users