How much more efficient are power-of-two textures?

Question

I am creating an OpenGL video player using Ffmpeg and all my videos aren\'t power of 2 (as they are normal video resolutions). It runs at fine fps with my nvidia card but I\

Answer 1

Writing a video player you should update your texture content using glTexSubImage2D(). This function allows you to supply arbitarily sized images, that will be placed somewhere in the target texture. So you can initialize the texture first with a call of glTexImage() with the data pointer being NULL, then fill in the data.

The performance gain of pure power of 2 textures strongly depends on the hardware used, but in extreme cases it may be up to 300%.