Merge pull request #1697 from 3b1b/video-work

Video work

manimlib/mobject/svg/drawings.py

@@ -50,6 +50,7 @@ class Lightbulb(SVGMobject):
 
     def __init__(self, **kwargs):
         super().__init__("lightbulb", **kwargs)
+        self.insert_n_curves(25)
 
 
 class Speedometer(VMobject):

manimlib/mobject/three_dimensions.py

@@ -7,7 +7,6 @@ from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.mobject.types.vectorized_mobject import VMobject
 from manimlib.mobject.geometry import Square
 from manimlib.mobject.geometry import Polygon
-from manimlib.mobject.geometry import Line
 from manimlib.utils.bezier import interpolate
 from manimlib.utils.config_ops import digest_config
 from manimlib.utils.space_ops import get_norm

manimlib/scene/scene_file_writer.py

@@ -308,7 +308,7 @@ class SceneFileWriter(object):
         )
         temp_file_path = stem + "_temp" + ext
         commands = [
-            "ffmpeg",
+            FFMPEG_BIN,
             "-i", movie_file_path,
             "-i", sound_file_path,
             '-y',  # overwrite output file if it exists