Hi Ernesto,
I see that Chimera daily builds are incorrectly giving the
option "-qscale 8" to ffmpeg, the program included in Chimera that
does the movie encoding. The "-qscale 8" conflicts and apparently
overrides the "-b 5000kb" bit rate setting you requested. Both
Chimera 1.5.3 and daily builds use qscale 8 which is variable bit
rate encoding if you do not specify bitrate. Recent changes to
Chimera movie defaults broke the movie quality handling. I have
fixed it. The fix will be in tonight's daily build, dated Jan 5
on the download page
http://www.cgl.ucsf.edu/chimera/download.html#daily
Thanks for identifying the problem.
Tom
Hi everyone,
I've made some movies using the current Chimera alpha version
(alpha version 1.6 build 35109, 2011-12-24) in an ubuntu 10.04
laptop. I've noticed that the quality of the movies is worse
that in the version 1.5.3, and I have generated the movies using
the same chimera session and the same script. I've seen this for
at least avi and mp4 formats.
The movie options I'm using in the script are:
movie record supersample 3
movie encode output movie.avi bitrate 5000 framerate 25
mformat avi
Does anybody know why the quality is worse in the newer Chimera
version?
Thanks in advance,
Ernesto.
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