Mencoder

Using ImageMagick / GraphicsMagick with Mencoder
The following example Ruby program outputs a simple animation as a series of PNG pictures: require 'RMagick' require 'fileutils' FileUtils::mkdir_p 'images' smallText          = Magick::Draw.new smallText.font     = 'VeraMono' smallText.pointsize = 40 smallText.gravity  = Magick::CenterGravity original = Magick::Image.new(300, 200) do self.background_color = "black" end (0...25).each do |frame| puts "processing frame \##{frame}" # blur and darken last frame copy = original.gaussian_blur(10,8).level(0,0.7) # draw fresh text smallText.annotate(copy, 0, 0, 0, 0, "frame \#%02d" % frame) do       self.fill = 'white' end # Save PNG: # * Very important! *    # MPlayer only understands PNG images with 8 bits per channel, so the PNG's     # must be encoded with depth=8. copy.write('images/image%03d.png' % frame) do self.depth = 8 end original = copy end When the program has run, create an AVI file: mencoder mf://images/*.png -mf w=300:h=200:fps=25:type=png -ovc lavc -lavcopts vcodec=mpeg4 -o anim.avi
 * 1) prepare font