GL_SGIX_mpeg1
https://www.khronos.org/registry/OpenGL/extensions/SGIX/SGIX_mpeg1.txt
GL_SGIX_mpeg1

	void glAllocMPEGPredictorsSGIX (GLsizei width, GLsizei height, GLsizei n, GLuint* predictors)
	void glDeleteMPEGPredictorsSGIX (GLsizei n, GLuint* predictors)
	void glGenMPEGPredictorsSGIX (GLsizei n, GLuint* predictors)
	void glGetMPEGParameterfvSGIX (GLenum target, GLenum pname, GLfloat* params)
	void glGetMPEGParameterivSGIX (GLenum target, GLenum pname, GLint* params)
	void glGetMPEGPredictorSGIX (GLenum target, GLenum format, GLenum type, void *pixels)
	void glGetMPEGQuantTableubv (GLenum target, GLubyte* values)
	GLboolean glIsMPEGPredictorSGIX (GLuint predictor)
	void glMPEGPredictorSGIX (GLenum target, GLenum format, GLenum type, void *pixels)
	void glMPEGQuantTableubv (GLenum target, GLubyte* values)
	void glSwapMPEGPredictorsSGIX (GLenum target0, GLenum target1)