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.
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
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
For me it also makes a difference and it should be put into the manual for sure as a possibility on some computers. I assume it is based on the speed to get to the disks?? And there is probably a "sweet spot" for anyone's specific system. Here are my observations but not totally scientific based on 64-bit Fedora 31/32. Input File: Big Buck Bunny with Video Effect brightness/contrast applied; Play every frame enabled (I got different results when not Play every frame). *HP slow laptop* Forward Framerate Achieved = 32 for .5, 1.0, and 2.0 seconds. *0.5 *seconds Reverse Framerate Achieved average = *15* and varied from a low of 9 to a high of 18 *1.0* seconds Reverse Framerate Achieved average = *18 *and varied from a low of 15 to a high of 23 -- playing seemed moe consistent 2.0 seconds Reverse Framerate Achieved average = 17 and varied from a low of 13 to a high of 23 *AMD gaming laptop* Forward Framerate Achieved = 60 for .5, 1.0 and 2.0 seconds. * 0.5 *seconds Reverse Framerate Achieved average = *32* and varied from a low of 19 to a high of 40 *1.0* seconds Reverse Framerate Achieved average = *36 *and varied from a low of 28 to a high of 42 -- playing seemed moe consistent 2.0 seconds Reverse Framerate Achieved average = 35 and varied from a low of 30 to a high of 43 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
Thanks. I have to scale back my enthusiasm. With Further Testing I don't get much of a boost, especially if there are effects and transitions.
Andrea, still it would be useful to make a note in the Manual so I will do that unless you would rather do that yourself? It seems to run in reverse more consistently for me and not as jerky - although my test only had 1 video effect added. I have to scale back my enthusiasm. With Further Testing I don't get
much of a boost, especially if there are effects and transitions.
Yes, it is helpful to put some more details in the manual. I'll look into it, but let me run a few more tests so I have a clearer idea.
Here are the variations to the manual on caching and preroll. Please, the usual check on the language! (but why doesn't the whole world speak Italian?).
On Thursday, May 5, 2022, Andrea paz via Cin <[email protected]> wrote:
Here are the variations to the manual on caching and preroll. Please, the usual check on the language! (but why doesn't the whole world speak Italian?).
because interesting Italians speak english already?) spatial audio/VR http://pcfarina.eng.unipr.it/Ambix_3rd_order.htm (found by chance while searching for 'matrixing' operation apparently required for TrueHD 5.1/7.1 encoder..)
Thank you. With a few minor mods, checked into GIT. We should all just be speaking one language called "Earth" so that we can talk to the aliens more easily -- you know they are out there right?! On Thu, May 5, 2022 at 1:06 PM Andrea paz <[email protected]> wrote:
Here are the variations to the manual on caching and preroll. Please, the usual check on the language! (but why doesn't the whole world speak Italian?).
Unfortunately, my old computer's performance doesn't improve by changing Preroll values. (OS-UbuntuStudio16.04_64bit) Andrea wrote: but why doesn't the whole world speak Italian? "Why are you speaking in English?" (Sheldon Cooper) My suggestion would be to speak in Klingon or UbbiDubbi! Take a look at https://www.youtube.com/watch?v=ETFmY93JnoU
participants (4)
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Andrea paz -
Andrew Randrianasulu -
Igor BEGHETTO -
Phyllis Smith