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 <[email protected]> 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 < > [email protected]> 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 >> [email protected] >> https://lists.cinelerra-gg.org/mailman/listinfo/cin >> >
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