The affected server was taken offline and has been replaced and all software reinstalled. G = plot((sum((-1)^(n-1)*sin(n*x)/n,n,1,k)), xr, color="blue", legend_label='k = %d' % k) The server on which FFmpeg and MPlayer Trac issue trackers were installed was compromised. Saving an animation toĪ movie file in any format other than GIF requires this software, soįor reference, here is the code that gives the error: n = var("n") OSError: Error: ffmpeg does not appear to be installed. Error in lines 9-9įile "/usr/local/sage/local/lib/python2.7/site-packages/smc_sagews/sage_server.py", line 1188, in executeįlags=compile_flags) in namespace, localsįile "/usr/local/sage/local/lib/python2.7/site-packages/smc_sagews/sage_salvus.py", line 2944, in showįile "/usr/local/sage/local/lib/python2.7/site-packages/smc_sagews/sage_salvus.py", line 2903, in show0įile "/usr/local/sage/local/lib/python2.7/site-packages/smc_sagews/sage_salvus.py", line 2868, in show0įile "/usr/local/sage/local/lib/python2.7/site-packages/smc_sagews/sage_salvus.py", line 2642, in show_animationįile "/usr/local/sage/local/lib/python2.7/site-packages/sage/plot/animate.py", line 885, in ffmpeg Everything seems to be working but I am trying to debug why sage -pip install -user ffmpeg did not make the " OSError: Error: ffmpeg does not appear to be installed." message go away, even though it said it had been installed. I am running a Docker instance of Cocalc on a Ubuntu 16 server.
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