[Cin] Multitrack performance issues

[Andrew Randrianasulu]

вс, 28 июл. 2024 г., 10:00 Stefan de Konink via Cin <
cin at lists.cinelerra-gg.org>:

> In my opinion, Cinelerra must be able to guess this itself.
>

Adam implemented something like this incin-HV

https://github.com/heroineworshiper/hvirtual/commit/c1d4250a29e7fed632a9ec6a5fab2dec0d63a437



> Op 7/28/24 om 02:36 schreef Phyllis Smith:
> > Stefan, in looking at the performance improvements you outlined below,
> > this one is really a HUGE improvement:
> >    - modifying the "stacked video" (opacity 100%) to disable "Play
> > track" in the patchbay for the tracks that you do not need to see is the
> > winner.  I will add that to the Performance Tips section of the manual.
> > It is a great tip for any computer, not just the smaller ones.
> >
> > But in my tests "for a disabled video effect, the CPU still runs", I did
> > not see this happening using the "top" command.  It seemed to make a
> > nice difference in lowering the cpu when I disabled the plugin.  Maybe
> > it is just the plugin I used? Burning Tv?  I will try some different
> > ones.  Also I did not verify that colourspace made no difference, but I
> > am sure you are right about that.
> >
> > Thanks for this tip that we can pass along to other users via the
> > manual. ...Phyllis
> >
> > On Mon, Jul 22, 2024 at 3:26 AM Stefan de Konink via Cin
> > <cin at lists.cinelerra-gg.org <mailto:cin at lists.cinelerra-gg.org>> wrote:
> >
> >     I think have a significant opportunity to improve the Cinerella
> >     performance, under normal editing conditions, by n_videotracks-fold.
> At
> >     this point in time I notice that the CPU usage (decoding) for a
> section
> >     where multiple tracks are stacked, but only the top one is actually
> on
> >     screen (read opacity 100%) could be improved.
> >
> >     I observe the following:
> >
> >        - for a disabled video effect, the CPU still runs
> >        - for stacked video, the CPU still runs for both videos
> >        - the effect must be detached and the video below must have play
> >     track
> >          disabled to prevent the CPU to go from 20% to 150%
> >        - this is independent of colourspace (RGB, RGBA, YUV or YUVA)
> >
> >     --
> >     Stefan
> >     --
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> >
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>
> --
> Stefan
>
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