[Chimera-users] movie quality

Tom Goddard goddard at sonic.net
Wed Jan 4 11:12:50 PST 2012

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


Thanks for identifying the problem.


> 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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