On Wed, Oct 18, 2006 at 04:58:25PM +0800, Graham Evans wrote: > Cinelerra with Open GL is a lot of fun to play with - thanks for all the > effort to get this working. I have some questions if anyone has a spare > second... > > Gamma is listed as one of the openGL accelerated effects but when I make > gamma anything other than 1.0 I seem to lose my acceleration. I can > move the maximum slider on the gamma dialog box and keep my openGL > acceleration but for openGL it seems the gamma slider must remain at > 1.0 . > > Is this because I have a low end video card or is this a common > experience? (geforce 6200 TC) > > Also I notice the openGL acceleration is substantially lessened once you > accumulate a few layers of effects. > > Again I wonder if my experience would improve with a higher spec video > card. Has anyone been able to compare? > > I am currently running: > cinelerra svn 940 (svn from today) > config options: --enable-mmx --enable-3dnow > > on hardware: > Asus A8n-sli > Athlon 64 X2 4200+ > 2GB DDR400 > Nvidia GeForce 6200TC > on FC4_64. > > Graham E
Graham, Here's what's written in the HV "Secrets of Cinelerra" manual: The scaling equation in Preferences is ignored by OpenGL. OpenGL always uses linear scaling. Project and track sizes need to be multiples of 4 for OpenGL to work. To get the most acceleration, OpenGL-enabled effects must be placed after software-only effects. All rendering before the last software-only effect is done in software. The core Cinelerra operations like camera and projector are of course OpenGL. Nicolas. _______________________________________________ Cinelerra mailing list Cinelerra@skolelinux.no https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
