[Cin] Cinelerra & GPU

Pierre autourduglobe p.autourduglobe at gmail.com
Fri Apr 26 04:46:37 CEST 2019

I wish it had worked better....

I remind you that my computer includes an Intel i7 3770k CPU and a 
Nvidia GTX-750Ti video card.

I did a lot of tests with the same.xml file that contains 4 mixers. Each 
time I checked both with mpeg proxies and original DNxHD sources.

All my tests were done with the X11 video driver only, because the 
X11-OpenGL driver has been crashing Cin-GG systemically for some time.

I have installed
libva-dev alone
libvdpau-dev alone
libva-dev and libvdpau-dev together

In each case I launched Cin-GG by
CIN_HW_DEV=vaapi ./cin
or by
CIN_HW_DEV=vdpau ./cin
And I also compared by launching Cin-GG
simply by./cin

Only the mpeg proxys files showed a slight decrease in CPU usage 
(33%/48%) in combination with the installation of libva-dev and the 
launch by CIN_HW_DEV=vdpau./cin.
If libvdpau-dev is also installed in addition to libva-dev, there is no 
impact on this result, but libva-dev is required to see this reduction.

In any case, I have never observed any difference in CPU usage with 
source media in DNxHD.


On 19-04-25 11 h 53, Sam wrote:
> I think vdpau seems to be the right setting. I also have an Intel 
> processor and an Nvidia graphics card. With vdpau I get the best 
> results. The CPU is hardly used, but the FPS is almost always at 
> maximum. Especially when I switch to X11-OpenGL, I only have 12% CPU 
> load left. Subjectively I have the impression it plays a bit more 
> smoothly. I notice the clearest difference at the fan of the computer. 
> It is hardly noticeable with the hardware acceleration. Without hardware 
> acceleration I get earache because the CPU fan gets extremely loud.
> Thanks to Andrea for the tip with libva-vdpau post-installation, that's 
> how I got it to work.
> Here are my tests:
> X11
> CIN_HW_DEV=off ./cin       -> CPU 58%
> CIN_HW_DEV=vdpau ./cin -> CPU 32%
> CIN_HW_DEV=vaapi ./cin  -> CPU 82%
> X11-OpenGL
> CIN_HW_DEV=off ./cin       -> CPU 48%
> CIN_HW_DEV=vdpau ./cin -> CPU 12% :-)
> CIN_HW_DEV=vaapi ./cin  -> CPU 80%
> Sam

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