On Wed, May 15, 2019 at 4:35 PM Andrew Randrianasulu <randrianasulu@gmail.com> wrote:

wild guess:

Not so "wild" after all. This was an amazing discovery/knowledge that Andrew passed along that is much appreciated for anyone with an Nvidia card using Cinelerra and having low frames/sec.

Try to enable/disable Vsync in ... driver's control application (I assume you use proprietary drivers with Nvidia GTX-750ti)

Thank you and I am adding this to the manual in the GPU hardware acceleration section for others who have not seen this here. Thank you Andrew! More wild guesses needed! GoodGuy/Phyllis