old_contents: import os
  
  from moviepy.editor import VideoFileClip
  
  
  def save_file(tmp_folder, instance_id, file_to_save):
      """
      Save given file in given path. This function should only be used for
      temporary storage.
      """
      extension = file_to_save.filename[-4:]
      file_name = instance_id + extension.lower() + ".tmp"
      file_path = os.path.join(tmp_folder, file_name)
      file_to_save.save(file_path)
      return file_path
  
  
  def generate_thumbnail(movie_path):
      """
      Generate a thumbnail to represent the movie given at movie path. It
      takes a picture at the middle of the movie.
      """
      folder_path = os.path.dirname(movie_path)
      file_source_name = os.path.basename(movie_path)
      file_target_name = "%s.png" % file_source_name[:-4]
      file_target_path = os.path.join(folder_path, file_target_name)
  
      movie_clip = VideoFileClip(movie_path)
      movie_clip.save_frame(file_target_path, 0)
      return file_target_path
  
  
  def normalize_movie(movie_path):
      """
      Turn movie in a 720p movie file.
      """
      folder_path = os.path.dirname(movie_path)
      file_source_name = os.path.basename(movie_path)
      file_target_name = "%s.mp4" % file_source_name[:-8]
      file_target_path = os.path.join(folder_path, file_target_name)
  
      movie_clip = VideoFileClip(movie_path)
      movie_clip = movie_clip.resize(height=720)
      movie_clip.write_videofile(file_target_path)
      return file_target_path
  
new_contents: import os
  
  from moviepy.editor import VideoFileClip
  
  
  def save_file(tmp_folder, instance_id, file_to_save):
      """
      Save given file in given path. This function should only be used for
      temporary storage.
      """
      extension = file_to_save.filename[-4:]
      file_name = instance_id + extension.lower() + ".tmp"
      file_path = os.path.join(tmp_folder, file_name)
      file_to_save.save(file_path)
      return file_path
  
  
  def generate_thumbnail(movie_path):
      """
      Generate a thumbnail to represent the movie given at movie path. It
      takes a picture at the middle of the movie.
      """
      folder_path = os.path.dirname(movie_path)
      file_source_name = os.path.basename(movie_path)
      file_target_name = "%s.png" % file_source_name[:-4]
      file_target_path = os.path.join(folder_path, file_target_name)
  
      movie_clip = VideoFileClip(movie_path)
      movie_clip.save_frame(file_target_path, 0)
      return file_target_path
  
  
  def normalize_movie(movie_path, height=1080, qscale='2'):
      """
      Turn movie in a 720p movie file.
      """
      folder_path = os.path.dirname(movie_path)
      file_source_name = os.path.basename(movie_path)
      file_target_name = "%s.mp4" % file_source_name[:-8]
      file_target_path = os.path.join(folder_path, file_target_name)
  
      movie_clip = VideoFileClip(movie_path)
      movie_clip = movie_clip.resize(height=height)
      movie_clip.write_videofile(
          file_target_path,
          ffmpeg_params=['-qscale:v', qscale]
      )
      return file_target_path
  
subject: Make all preview video 1080p