old_contents: import requests
  import base64
  from tqdm import tqdm
  import sys
  import subprocess as sp
  
  FFMPEG_BIN = 'ffmpeg.exe'
  
  master_json_url = sys.argv[1]
  base_url = master_json_url[:master_json_url.rfind('/', 0, -26) - 5]
  
  resp = requests.get(master_json_url)
  content = resp.json()
  
  heights = [(i, d['height']) for (i, d) in enumerate(content['video'])]
  idx, _ = max(heights, key=lambda (_, h): h)
  video = content['video'][idx]
  video_base_url = base_url + 'video/' + video['base_url']
  print 'base url:', video_base_url
  
  #filename = sys.argv[2] + '.mp4' if sys.argv[2] else 'video_%d.mp4' % video['id']
  filename = 'v.mp4'
  video_filename = filename
  print 'saving to %s' % filename
  
  video_file = open(filename, 'wb')
  
  init_segment = base64.b64decode(video['init_segment'])
  video_file.write(init_segment)
  
  for segment in tqdm(video['segments']):
      segment_url = video_base_url + segment['url']
      resp = requests.get(segment_url, stream=True)
      if resp.status_code != 200:
          print 'not 200!'
          print resp
          print segment_url
          break
      for chunk in resp:
          video_file.write(chunk)
  
  video_file.flush()
  video_file.close()
  
  audio = content['audio'][0]
  audio_base_url = base_url + audio['base_url'][3:]
  print 'base url:', audio_base_url
  
  #filename = sys.argv[2] + '.mp3' if sys.argv[2] else 'audio_%d.mp3' % audio['id']
  filename = 'a.mp3'
  audio_filename = filename
  print 'saving to %s' % filename
  
  audio_file = open(filename, 'wb')
  
  init_segment = base64.b64decode(audio['init_segment'])
  audio_file.write(init_segment)
  
  for segment in tqdm(audio['segments']):
      segment_url = audio_base_url + segment['url']
      resp = requests.get(segment_url, stream=True)
      if resp.status_code != 200:
          print 'not 200!'
          print resp
          print segment_url
          break
      for chunk in resp:
          audio_file.write(chunk)
  
  audio_file.flush()
  audio_file.close()
  
  filename = sys.argv[2] + '.mp4' if sys.argv[2] else 'video.mp4'
  
  command = [ FFMPEG_BIN,
          '-y', # (optional) overwrite output file if it exists
          '-i', audio_filename,
          '-i',video_filename,
          '-acodec', 'copy',
          '-vcodec', 'copy',
          filename ]
  
  pipe = sp.Popen( command, stdin=sp.PIPE, stderr=sp.PIPE)
new_contents: import requests
  import base64
  from tqdm import tqdm
  import sys
  import subprocess as sp
  
  FFMPEG_BIN = 'ffmpeg.exe'
  
  master_json_url = sys.argv[1]
  base_url = master_json_url[:master_json_url.rfind('/', 0, -26) - 5]
  
  resp = requests.get(master_json_url)
  content = resp.json()
  
  heights = [(i, d['height']) for (i, d) in enumerate(content['video'])]
  idx, _ = max(heights, key=lambda (_, h): h)
  video = content['video'][idx]
  video_base_url = base_url + 'video/' + video['base_url']
  print 'base url:', video_base_url
  
  filename = 'v.mp4'
  video_filename = filename
  print 'saving to %s' % filename
  
  video_file = open(filename, 'wb')
  
  init_segment = base64.b64decode(video['init_segment'])
  video_file.write(init_segment)
  
  for segment in tqdm(video['segments']):
      segment_url = video_base_url + segment['url']
      resp = requests.get(segment_url, stream=True)
      if resp.status_code != 200:
          print 'not 200!'
          print resp
          print segment_url
          break
      for chunk in resp:
          video_file.write(chunk)
  
  video_file.flush()
  video_file.close()
  
  audio = content['audio'][0]
  audio_base_url = base_url + audio['base_url'][3:]
  print 'base url:', audio_base_url
  
  filename = 'a.mp3'
  audio_filename = filename
  print 'saving to %s' % filename
  
  audio_file = open(filename, 'wb')
  
  init_segment = base64.b64decode(audio['init_segment'])
  audio_file.write(init_segment)
  
  for segment in tqdm(audio['segments']):
      segment_url = audio_base_url + segment['url']
      resp = requests.get(segment_url, stream=True)
      if resp.status_code != 200:
          print 'not 200!'
          print resp
          print segment_url
          break
      for chunk in resp:
          audio_file.write(chunk)
  
  audio_file.flush()
  audio_file.close()
  
  filename = sys.argv[2] + '.mp4' if sys.argv[2] else 'video.mp4'
  
  command = [ FFMPEG_BIN,
          '-y', # (optional) overwrite output file if it exists
          '-i', audio_filename,
          '-i',video_filename,
          '-acodec', 'copy',
          '-vcodec', 'copy',
          filename ]
  
  pipe = sp.Popen( command, stdin=sp.PIPE, stderr=sp.PIPE)
subject: remove commented code