text: digits = 6
  input_ext = '.jpg'
  video_options = {
      'WEBM': ('-filter_complex "scale=<res>" -c:v libvpx-vp9 -speed 0 -crf <crf> -b:v 0 -threads 2 -tile-columns 6 -frame-parallel 1 -auto-alt-ref 1 -lag-in-frames 25',
          ".webm"),
      'MP4': ('-filter_complex "scale=<res>" -c:v libx264 -profile:v main -level:v 3.2 -pix_fmt yuv420p', ".mp4"),
      'FRAMES': ('', '/%03d.png'),
      'gif': '',
      'COPY': ('-map 0:v:0 -c:v copy', '%ext')}
  audio_options = {'opus': '-c:a libopus -vbr on -b:a 100k',
                   'no audio': '-an',
                   'Native format': '-map 0:a:0 -c:a copy',
                   'mp3': '-c:a libmp3lame -qscale:a 3',
                   'aac': '-c:a aac -b:a 160k'}
  image_types = ('.bmp', '.png', '.jpg', '.webp')
  
  duration_command = '"%s" -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 -sexagesimal "%s"'
  fps_command = '"%s" -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate "%s"'