ASKSAGE: Sage Q&A Forum - Latest question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Thu, 22 Aug 2013 06:15:42 -0500Update animate.py for gif creation using ffmpeghttp://ask.sagemath.org/question/10463/update-animatepy-for-gif-creation-using-ffmpeg/As I tried to run
Animated plots -- Sage Reference Manual v5.11: 2D Graphics
and there the example
a = animate([sin(x + float(k)) for k in srange(0,2*pi,0.7)],
xmin=0, xmax=2*pi, figsize=[2,1])
dir = tmp_dir()
#a.ffmpeg(savefile=dir + 'new.mpg') # optional -- ffmpeg
#a.ffmpeg(savefile=dir + 'new.avi') # optional -- ffmpeg
a.ffmpeg(savefile=dir + 'new.gif') # optional -- ffmpeg
#a.ffmpeg(savefile=dir + 'new.mpg', show_path=True) # optional -- ffmpeg
there appeared an error on the gif creation. Thus using the option verbose = true. There the error was explained to appear in
/Applications/Sage-5.11-OSX-64bit-10.6.app/Contents/Resources/sage/devel/sage-main/build/sage/plot/animate.py
in line 570.
There the line is
ffmpeg_options += ' -pix_fmt rgb24 -loop_output %s ' % iterations
where the option -loop_output should be changed to -loop as I did since ffmpeg states "This option is deprecated, use -loop".
Then the creation of a gif file worked with my version of ffmpeg: 1.2.1, using the ffmpeg command but the file is still of minor quality compared to e.g. mp4.
So perhaps somebody of the staff team can change the animate.py file for future versions. I know that it should be done by a ticket but as a newbee I'm not familiar in making up a ticket. Thanks
jazzThu, 22 Aug 2013 06:15:42 -0500http://ask.sagemath.org/question/10463/