It seems that the Animation.save method assume that ffmpeg is installed,
as there is no cmd_gen keyword argument for this method.
As a quick and dirty fix, you may change the imposed commandline
constructor overloading the ffmpeg_cmd method
ani.ffmpeg_cmd = ani.mencoder_cmd
or, if you prefer using gstreamer, something like that (not tested)
def gst_cmd(fname, fps, codec, frame_prefix):
cmd = 'gst-launch multifilesrc location="{prefix}%%04d.png"
index={i0} num-buffers={nb} '\
'caps="image/png,framerate=\(fraction\){fps}/1" ! pngdec !
ffmpegcolorspace ! '\
'{codec_f} ! filesink location={fname} '
nb_frames = len([tmp for tmp in os.listdir('./') if
tmp.endswith('.png') and tmp.startswith(frame_prefix)])
return cmd.format(prefix=frame_prefix, i0=0, nb=nb_frames, fps=fps,
codec_f=codec+'mux', fname=fname)
ani.ffmpeg_cmd = gst_cmd
--
Fabrice Silva
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