[Cin] Seconds to preroll render

[Andrew Randrianasulu]

for me only obvious positive difference comes from increasing cache from
256 mb to 2048 mvb

but I am on 32-bit cin + 64 bit Linux kernel (5.1.12)

I tried with single 1080p 24 fps vp9 video as downloaded from youtube. With
default 256 mb cache reverse playback stutters a lot. With 512 it stutters
less. With 2048 mb it stutters only ocassionally.

Changing preroll renders from 0 to 100.0 does not change things for me.

On Tuesday, May 3, 2022, Phyllis Smith via Cin <cin at lists.cinelerra-gg.org>
wrote:

> That is quite a discovery.  Hopefully, I can find time today to test that
> as I have a really slow laptop and a decent faster laptop.
> Maybe that is what makes the difference.  OR it could just be 0.5 seconds
> is leftover from the really old days.
>
> On Tue, May 3, 2022 at 2:18 AM Andrea paz via Cin <
> cin at lists.cinelerra-gg.org> wrote:
>
>> One thing that has always bothered me is that in the transition from
>> an 11 year old notebook to a mid-to-high level PC, playback and
>> especially reverse playback always suffered from the same lags and
>> framerate drops. There wasn't the improvement I expected. In the
>> Preferences > Performance tab, I tried increasing the "Cache size"
>> from 256MB (default) to 4096MB without noticing any change (I have
>> 32GB of RAM). I never touched the "Seconds to preroll renders" option,
>> which by default is 0.5 seconds. Now I've tried to set it to 1.0s and
>> the improvement in playback and reverse playback is EVIDENT!
>> If anyone feels like trying to take a problematic project in timeline
>> and increase the preroll time and then report the results, it would be
>> a favor to me. If the improvement is also confirmed by others I will
>> immediately put the tip in the manual, because it seems very important
>> to me.
>> --
>> Cin mailing list
>> Cin at lists.cinelerra-gg.org
>> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>>
>
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