Typically only a small subset of the SDL texture formats are supported directly by the SDL renderer drivers, the rest is software emulated. It's better if libswscale does the format conversion to a hardware-accelerated texture format instead of SDL. This should fix video render slowdowns with some texture formats after 3bd2228d05a05eab5f91ac00b01efac9cb07649b. Signed-off-by: Marton Balint <cus@passwd.hu>