Really dumb copy-pasting of extract_scene.py and scene.py from master to get what I want. Not sure what's going on here.

extract_scene.py

@@ -18,7 +18,6 @@ from camera import Camera
 HELP_MESSAGE = """
    Usage:
    python extract_scene.py <module> [<scene name>]
-
    -p preview in low quality
    -s show and save picture of last frame
    -w write result to file [this is default if nothing else is stated]
@@ -35,7 +34,6 @@ SCENE_NOT_FOUND_MESSAGE = """
 CHOOSE_NUMBER_MESSAGE = """
 Choose number corresponding to desired scene/arguments.
 (Use comma separated list for multiple entries)
-
 Choice(s): """
 INVALID_NUMBER_MESSAGE = "Fine then, if you don't want to give a valid number I'll just quit"
 
@@ -95,6 +93,7 @@ def get_configuration():
       "save_pngs"       : args.save_pngs,
       #If -t is passed in (for transparent), this will be RGBA
       "saved_image_mode": "RGBA" if args.transparent else "RGB",
+      "movie_file_extension" : ".mov" if args.transparent else ".mp4",
       "quiet"           : args.quiet or args.write_all,
       "ignore_waits"    : args.preview,
       "write_all"       : args.write_all,
@@ -237,6 +236,7 @@ def main():
          "write_to_movie",
          "output_directory",
          "save_pngs",
+         "movie_file_extension",
          "start_at_animation_number",
          "end_at_animation_number",
       ]

scene/scene.py

@@ -82,7 +82,7 @@ class Scene(Container):
     def setup(self):
         """
         This is meant to be implement by any scenes which
-        are commonly subclassed, and have some common setup
+        are comonly subclassed, and have some common setup
         involved before the construct method is called.
         """
         pass
@@ -366,7 +366,6 @@ class Scene(Container):
         Each arg can either be an animation, or a mobject method
         followed by that methods arguments (and potentially follow
         by a dict of kwargs for that method).
-
         This animation list is built by going through the args list,
         and each animation is simply added, but when a mobject method
         s hit, a MoveToTarget animation is built using the args that
@@ -387,7 +386,7 @@ class Scene(Container):
                 animations.pop()
                 #method should already have target then.
             else:
-                mobject.target = mobject.deepcopy()
+                mobject.generate_target()
             #
             if len(state["method_args"]) > 0 and isinstance(state["method_args"][-1], dict):
                 method_kwargs = state["method_args"].pop()
@@ -578,17 +577,12 @@ class Scene(Container):
             FFMPEG_BIN,
             '-y', # overwrite output file if it exists
             '-f', 'rawvideo',
-            '-vcodec','rawvideo',
             '-s', '%dx%d'%(width, height), # size of one frame
             '-pix_fmt', 'rgba',
             '-r', str(fps), # frames per second
             '-i', '-', # The imput comes from a pipe
             '-an', # Tells FFMPEG not to expect any audio
-            '-vcodec', 'mpeg',
-            '-c:v', 'libx264',
-            '-pix_fmt', 'yuv420p',
             '-loglevel', 'error',
-            temp_file_path,
         ]
         if self.movie_file_extension == ".mov":
             # This is if the background of the exported video
@@ -624,4 +618,3 @@ class EndSceneEarlyException(Exception):
 
 
 
-