Workflow workaround for unoptimized preview (preview vs proxy)

[Evert Vorster]

Hi there, Alberto.

Thank you for sharing your workflow, and workarounds.

As for the rendering of effects, I have had some very bad experiences.
It seems that when selecting more than one thread, each effect gets a
thread, and since some effects apply faster than others sometimes an effect
is applied to a frame, or not.


-Evert-

On 11 September 2017 at 15:09, alberto fuentes <pajaro at gmail.com> wrote:

> Proxy files are okay to a certain degree, specially early on on the
> editing process when bulk editing is done, but they get useless very
> soon after a more refine editing needs to be done
>
> Low quality doesnt allow you to see many details that needs to be seen
> in order to edit the small stuff... and even when they do, the proxy
> slows down too after 1 or 2 effects are applied, even if less
>
> Maybe im missing something and i dont know how to use proxy well, but
> I have a very new beefy computer and the clip gets choppy very often,
> even with proxy files
>
> Also, switching proxy on and off, invalidates the whole preview...
> which makes not wanting to active proxy to begin with
>
> My solution has been to run preview for the whole clip, even if slow,
> its done in the background while editing and while im having my lunch
> :)
>
> Right now the spacer tool doesnt invalidate the preview as per bug
> https://bugs.kde.org/show_bug.cgi?id=367079
>
> But even if you manually invalidate it, its very slow
> https://bugs.kde.org/show_bug.cgi?id=384593
>
>
> MY WORKAROUND is to watch the whole preview and take notes of the
> editing that needs to be done. Then, start working on those points
> FROM THE END TO THE BEGINING. This way, the spacer tool and moving
> things around, wont invalidate previews clips
>
> If you start from begning to end, every little edit that involves
> spacing or insert, will invalidate the whole thing
>
>
>
> Id like comments on this idea, and hows your own workflow in kdenlive,
> because im new to video editing in general and kdenlive in particual,
> and maybe im doing something wrong
>
> Thanks for reading!
>
>
> PS: Also, is it possible to use several threads for preview? I have a
> modern i7 with 8 cores and only 1 seems to be working. Since 1 second
> chunks are procesed, this seems an easy target for parallelization,
> unless last frame preview is needed for the next and I dont know about
> it. Not sure if I should open a bug about this or if this new timeline
> that is being worked on right now will fix all these problems. A
> developer comment would be welcomed :)
>



-- 
Evert Vorster
Isometrix Acquistion Superchief
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