[Cin] Multitrack performance issues

[Andrew Randrianasulu]

пн, 22 июл. 2024 г., 12:26 Stefan de Konink via Cin <
cin at lists.cinelerra-gg.org>:

> 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
>

Strange, I mostly test single video track, but if I disable effect on it it
consumes less cpu?

Does every video plugin behaves this way?



  - 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)
>


I think implementation of such optimization can be a little tricky due to
route/shared plugins?

May be ask Adam to implement it in cinHV first (if cinHV similarly
affected) and then we will see if diff can be applied  to our tree?

>
> --
> Stefan
> --
> Cin mailing list
> Cin at lists.cinelerra-gg.org
> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>
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