Replace mencoder with imageio-ffmpeg

[manics]

https://pypi.org/project/imageio-ffmpeg/ should offer more control in the Make_Movie.py script than using mencoder:

omero-scripts/omero/export_scripts/Make_Movie.py

Lines 141 to 159 in 4a6eec0

	def build_avi(size_x, size_y, filelist, fps, movie_name, format):
	""" Encodes. """
	program = 'mencoder'
	args = ""
	if (format == WMV):
	args = ' mf://'+filelist + ' -mf w=' + str(size_x) + ':h=' + \
	str(size_y) + ':fps=' + str(fps) + \
	':type=jpg -ovc lavc -lavcopts vcodec=wmv2 -o %s' % movie_name
	elif (format == QT):
	args = ' mf://'+filelist + ' -mf w=' + str(size_x) + ':h=' + \
	str(size_y) + ':fps='+str(fps) + \
	':type=png -ovc lavc -lavcopts vcodec=mjpeg:vbitrate=800 -o %s' \
	% movie_name
	else:
	args = ' mf://'+filelist + ' -mf w=' + str(size_x) + ':h=' + \
	str(size_y) + ':fps=' + str(fps) + \
	':type=jpg -ovc lavc -lavcopts vcodec=mpeg4 -o %s' % movie_name
	log(args)
	os.system(program + args)