- (void)processMovieFrame:(CMSampleBufferRef)movieSampleBuffer {
..
CVReturn err = CVOpenGLESTextureCacheCreateTextureFromImage(kCFAllocatorDefault,
coreVideoTextureCache, movieFrame, NULL, GL_TEXTURE_2D, GL_RGBA, bufferWidth,
bufferHeight,    GL_BGRA, GL_UNSIGNED_BYTE, 0, &texture);
...