text: GL_NV_video_capture
  http://www.opengl.org/registry/specs/NV/video_capture.txt
  GL_NV_video_capture
  
  	GL_VIDEO_BUFFER_NV 0x9020
  	GL_VIDEO_BUFFER_BINDING_NV 0x9021
  	GL_FIELD_UPPER_NV 0x9022
  	GL_FIELD_LOWER_NV 0x9023
  	GL_NUM_VIDEO_CAPTURE_STREAMS_NV 0x9024
  	GL_NEXT_VIDEO_CAPTURE_BUFFER_STATUS_NV 0x9025
  	GL_VIDEO_CAPTURE_TO_422_SUPPORTED_NV 0x9026
  	GL_LAST_VIDEO_CAPTURE_STATUS_NV 0x9027
  	GL_VIDEO_BUFFER_PITCH_NV 0x9028
  	GL_VIDEO_COLOR_CONVERSION_MATRIX_NV 0x9029
  	GL_VIDEO_COLOR_CONVERSION_MAX_NV 0x902A
  	GL_VIDEO_COLOR_CONVERSION_MIN_NV 0x902B
  	GL_VIDEO_COLOR_CONVERSION_OFFSET_NV 0x902C
  	GL_VIDEO_BUFFER_INTERNAL_FORMAT_NV 0x902D
  	GL_PARTIAL_SUCCESS_NV 0x902E
  	GL_SUCCESS_NV 0x902F
  	GL_FAILURE_NV 0x9030
  	GL_YCBYCR8_422_NV 0x9031
  	GL_YCBAYCR8A_4224_NV 0x9032
  	GL_Z6Y10Z6CB10Z6Y10Z6CR10_422_NV 0x9033
  	GL_Z6Y10Z6CB10Z6A10Z6Y10Z6CR10Z6A10_4224_NV 0x9034
  	GL_Z4Y12Z4CB12Z4Y12Z4CR12_422_NV 0x9035
  	GL_Z4Y12Z4CB12Z4A12Z4Y12Z4CR12Z4A12_4224_NV 0x9036
  	GL_Z4Y12Z4CB12Z4CR12_444_NV 0x9037
  	GL_VIDEO_CAPTURE_FRAME_WIDTH_NV 0x9038
  	GL_VIDEO_CAPTURE_FRAME_HEIGHT_NV 0x9039
  	GL_VIDEO_CAPTURE_FIELD_UPPER_HEIGHT_NV 0x903A
  	GL_VIDEO_CAPTURE_FIELD_LOWER_HEIGHT_NV 0x903B
  	GL_VIDEO_CAPTURE_SURFACE_ORIGIN_NV 0x903C
  	void glBeginVideoCaptureNV (GLuint video_capture_slot)
  	void glBindVideoCaptureStreamBufferNV (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLintptrARB offset)
  	void glBindVideoCaptureStreamTextureNV (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLenum target, GLuint texture)
  	void glEndVideoCaptureNV (GLuint video_capture_slot)
  	void glGetVideoCaptureivNV (GLuint video_capture_slot, GLenum pname, GLint* params)
  	GLenum glVideoCaptureNV (GLuint video_capture_slot, GLuint* sequence_num, GLuint64EXT *capture_time)
      void glGetVideoCaptureStreamivNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLint* params)
      void glGetVideoCaptureStreamfvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLfloat* params)
      void glGetVideoCaptureStreamdvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLdouble* params)
      void glVideoCaptureStreamParameterivNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLint* params)
      void glVideoCaptureStreamParameterfvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLfloat* params)
      void glVideoCaptureStreamParameterdvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLdouble* params)
  