Rails: ffmpeg video generation from images

To generate video from a series of images/photos in rails, I use this code snippet:

    # generate the video and store it under the appropriate public path.
    def create_video_from(foto_paths = [], tyype)
      create_tmp_links(foto_paths)
      status = Paperclip.run('ffmpeg', ffmpeg_options)
      remove_tmp_links(foto_paths.length)
      FileUtils.mv('/tmp/output.mp4', Rails.root.to_s + "/public/#{tyype.to_s}_video.mp4")
    end

    def ffmpeg_options
      "-r 1 -f image2 -i '/tmp/img%03d.jpg' /tmp/output.mp4"
    end

    # ffmpeg requires filenames matching a pattern, so create them under /tmp
    def create_tmp_links(foto_paths = [])
      foto_paths.each_with_index do |path, i|
        tmp_path = "/tmp/img%03d.jpg" % (i + 1)
        File.symlink(path, tmp_path)
      end
      true
    end

    # remove those symlinks
    def remove_tmp_links(fotos_cnt = 0)
      fotos_cnt.times do |i|
        tmp_path = "/tmp/img%03d.jpg" % (i + 1)
        File.unlink(tmp_path)
      end
      true
    end

Hope it helps!