[CinCVS] Why OpenGL does not affect rendering, It just accelerates playback?

[Leigh Wanstead]

Hello everyone,

I read this url.
http://cvs.cinelerra.org/docs/split_manual_en/cinelerra_cv_manual_en_3.html#
SEC41

May I ask why OpenGL does not affect rendering, It just accelerates
playback? What is the reason?

TIA

Regards
Leigh
www.smootharm.com