Thanks again vade and bangnoise. FFMPEG decoder output format is planar 420 Y’CbCr, so I’ll need a shader for RGB conversion. But in future I’m planning to use built-in hardware video decoder that outputs 422 Y’CbCr format. For that I’ll use Apple extension. Thanks for the tip bangnoise, never heard of such extension before. My ultimate goal is to provide four 720p videos to Syphon simultaneously, so all performance gains are very welcome.