Kivy Error camera_puzzle demo 2011.06.11

[INFO              ] Logger: Record log in C:\Users\B-san\.kivy\logs\kivy_12-06-11_0.txt
[INFO              ] Kivy v1.2.0
[INFO              ] Factory: 106 symbols loaded
[DEBUG             ] Cache: register <kv.lang> with limit=None, timeout=Nones
[DEBUG             ] Cache: register <kv.image> with limit=None, timeout=60s
[DEBUG             ] Cache: register <kv.atlas> with limit=None, timeout=Nones
[DEBUG             ] Cache: register <kv.texture> with limit=1000, timeout=60s
[DEBUG             ] Cache: register <kv.shader> with limit=1000, timeout=60s
[DEBUG             ] Cache: register <kivy.loader> with limit=500, timeout=60s
[INFO              ] Loader: using <pygame> as thread loader
[INFO              ] Camera: using <gstreamer> as camera provider
[DEBUG             ] App: kv <C:\Users\B-san\Desktop\Kivy\kivy\examples\demo\puzzle.kv> not found
[INFO              ] Window: using <pygame> as window provider
[INFO              ] GL: OpenGL version <2.1.8794>
[INFO              ] GL: OpenGL vendor <ATI Technologies Inc.>
[INFO              ] GL: OpenGL renderer <ATI Radeon HD 3200 Graphics >
[INFO              ] GL: Shading version <1.30>
[INFO              ] GL: Texture max size <8192>
[INFO              ] GL: Texture max units <16>
[INFO              ] GL: OpenGL parsed version: 2, 1
[INFO              ] Shader: fragment shader: <Fragment shader was successfully compiled to run on hardware.>
[INFO              ] Shader: fragment compiled successfully
[INFO              ] Shader: vertex shader: <Vertex shader was successfully compiled to run on hardware.>
[INFO              ] Shader: vertex compiled successfully
[INFO              ] Shader: program: <Fragment shader(s) linked, vertex shader(s) linked.>
[DEBUG             ] ImagePygame: Load <C:\Users\B-san\Desktop\Kivy\kivy\kivy\data\glsl\default.png>
[INFO              ] Window: virtual keyboard not allowed, single mode, not docked
[WARNING           ] stderr: Traceback (most recent call last):
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\examples\demo\camera_puzzle.py", line 83, in <module>
[WARNING           ] stderr:     PuzzleApp().run()
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\kivy\app.py", line 464, in run
[WARNING           ] stderr:     root = self.build()
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\examples\demo\camera_puzzle.py", line 68, in build
[WARNING           ] stderr:     puzzle = Puzzle(resolution=(640, 480), play=True)
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\kivy\uix\camera.py", line 90, in __init__
[WARNING           ] stderr:     self._on_index()
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\kivy\uix\camera.py", line 100, in _on_index
[WARNING           ] stderr:     resolution=self.resolution, stopped=True)
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\kivy\core\camera\camera_gstreamer.py", line 43, in __init__
[WARNING           ] stderr:     super(CameraGStreamer, self).__init__(**kwargs)
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\kivy\core\camera\__init__.py", line 62, in __init__
[WARNING           ] stderr:     self.init_camera()
[WARNING           ] stderr:   File "C:\Users\B-san\Desktop\Kivy\kivy\kivy\core\camera\camera_gstreamer.py", line 61, in init_camera
[WARNING           ] stderr:     self._pipeline = gst.parse_launch(pl % (video_src, GL_CAPS))
[WARNING           ] stderr: glib.GError: no element "v4l2src"