[CinCV TNG] Hardware acceleration problem

Good Guy good1.2guy at gmail.com
Thu Jun 7 00:42:31 CEST 2018

This is the way it works since Adam Williams added the Direct Path
changes to the vdeviceX11 code.  It is a direct draw path and the
execution time for that path is low when the render does not require
remapping.  This is not a bug, it is a good idea.  It is fastest.

Next, X11-Xv is a device mapped video draw.  it is fast, but apparently
not as fast as the direct draw.  It can do hardware scaling and color

OpenGL means that drawing is using a second level machine, which
brings good functional features, but may be slower yet to just buffer
video frames.

On Wed, Jun 6, 2018 at 4:26 PM KhazAkar <damianzrb at gmail.com> wrote:

> I have a strange problem with X11-Xv and X11-OpenGL preview in
> Cinelerra-GG.
> X11 is the fastest option for me for preview, X11-Xv slover and X11-OpenGL
> - the slowest. Why this is happening?
> My setup:
> Dell Precision 5510 with i7-6820HQ, 32 GB DDR4 RAM, 512 GB Samsung SSD,
> Quadro M1000M, 4k IGZO display, OpenSUSE Tumbleweed, newest kernel etc.
> Why this is happening? Some sort of bug?
> _______________________________________________
> Cinelerra mailing list
> Cinelerra at lists.cinelerra-cv.org
> http://lists.cinelerra-cv.org/cgi-bin/mailman/listinfo/cinelerra
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