import os, Image

def CopyPic (PicName, NewName):
  print 'Copying ' + PicName + ' to ' + NewName
  os.system ('cp ' + PicName + '  ' + NewName)

picdir = 'demo'
os.system ('rm -r render')
os.mkdir ('render')
files = os.listdir (picdir)
picdir = picdir + '/'
files.sort()
frame = 0
count = len (files)
files.append (files [0])
for idx in range (count):
  for chunk in ['block', 'transition']:
    ini = open ('temp.ini', 'w')
    # ini.write ('Declare=test_mode=1\n')
    ini.write ('Antialias=On\n')
    ini.write ('Sampling_Method=1\n')
    ini.write ('Antialias_Threshold=0.5\n')
    ini.write ('Antialias_Depth=2\n')
    ini.write ('Width=720\n')
    ini.write ('Height=576\n')
    ini.write ('Cyclic_Animation=on\n')
    ini.write ('Pause_when_Done=off\n')
    ini.write ('Input_File_Name=scope.pov\n')
    ini.write ('Initial_Frame=' + str (frame) + '\n')
    if chunk == 'block':
      CopyPic (picdir + files [idx], '1.jpg')
      CopyPic (picdir + files [idx], '2.jpg')
      frame = frame + (25 * 4) # 4 seconds
    else:
      # pic 1 has already been copied during the prev step
      CopyPic (picdir + files [idx + 1], '2.jpg')
      ini.write ('Declare=transition_mode=1\n')
      frame = frame + (25 * 11) # 11 seconds
      ini.write ('Final_Frame=' + str (frame) + '\n')
      l = len (str (frame))
      prefix = ''
      while (len (prefix) + l) < 6:
        prefix = prefix + '0'
      ini.write ('Output_File_name=render/p' + prefix + '.png\n')
      ini.write ('Post_Frame_Command=./frame.py render/%o\n')
      ini.write ('Post_Frame_Command=./clock.py render/%o %n\n')
      ini.close ()
      os.system ('povray temp.ini')
      os.system ('find -type f | grep render/p | sort > list.txt')
      os.system ('transcode -o scope.dv -i list.txt --use_rgb -x imlist,null -z -k -g 720x576 -H 0 -y dvraw="qno=0" -F d -Z 720x576 --export_fps 25 --export_asr 2')
      os.system ('rm temp.ini 1.jpg 2.jpg list.txt')

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