video stream problem

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Joris
Doesn't Know Jack about VJ'ing or Software Development and Mostly Just Gets Coffee for Everyone
Posts: 5185
Joined: Fri May 22, 2009 11:38

Re: video stream problem

Post by Joris »

Hey guys

I'm 99% sure (never say 100% ;) )Flash is not responsible for this problem. It's actually a difference between how fast Resolume renders and how fast your monitor can display this. Basically what happens is that Resolume calculates what the image should look like, and sends this information to the monitor. The monitor will then begin 'drawing' it. If Resolume sends out new information before the monitor is fully finished with the previous frame, it will start drawing the new image halfway through the old one. This causes the 'tear' in the image you see. This would be especially noticeable in fast moving, high contrast images such as Flash content. You can read more about this problem here: http://hifi-india.blogspot.com/2006/11/ ... -do-i.html (it's a thorn in the side of gamers as well).

Playing around with the settings of the graphics card could work (maybe triple buffering has some effect), but rest assured that we're working on it. It's a bit of a pickle since it props up only on some graphic cards, and we'd rather come up with a good permanent solution, than a quick patch job.

Joris

GeeEs
Is seriously in love with Resolume. Met the parents and everything
Posts: 256
Joined: Fri Sep 26, 2008 13:26
Location: Netherlands

Re: video stream problem

Post by GeeEs »

I had a search on the web and some testing yesterday...

Strange enough... I found a similar problem which was related to switching off Vista Aero (theme)...
In Vista (and other windows versions) it's possible to switch of the theme service. Windows Vista then basicly runs in "classic/gray" windows mode (no glossy/glassy effects).
Most fanatic gamers, producers, powerusers etc. turn these services off while it is likely to win some cycles of the processor power that way. (I guess this would be marginal.. but hey...)

However... Don't ask me why... Some people experience more lag when turning this service off.
I tried it yesterday with theme services on/Aero theme as default theme.. and the "tearing" was gone for 90%... However.. the output still seems a bit shocky/not fluid. (On the projector output, but also on the preview insinde Avenue!).

While the problem is visible on the projector and also in the preview, I can't imagine it being a refresh rate problem. Otherwise everybody should experince this problem. (I think most users using their projector and laptop screen @ 60 Hz and never changed it or even had a look at it ;-)).

I also played a lot with the global and program specific NVidia settings, but I don't see any difference in performance (I changed almost all parameters to all possible settings to try)

The specs of my laptop are in my sig.
Anyway.. I'm curious if other (Vista) users benefit from turning on Aero theme and windows theme service...

Thx for looking into it!

PS. I did some more testing, using Winamp's visualisation Milkdrop 2.
I did not change anything to graphic settings. (compared with Avenue)
The output is flawless, no hickups/tearing.

Probably I can't compare this output with Avenue's output, but it seems to me that if the refresh rate of the output was wrong, it would be tearing on most applications with video or fast moving images.
The other way around... Avenue is the only application sending more frames than my refresh rate and all other applications are just slow or just in time ?!?
desktop: Windows 7 home premium 64 bit, MSI 870A-G54, AMD Phenom II X4 955 Black Edition, 4Gb RAM (GVP34GB1600C9DC), NVidia GTX 560
laptop: Windows 7 home premium 32 bit, Core2duo 2Ghz, 4Gb Ram, NVidia 9600m GT

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Godzil
Hasn't felt like this about software in a long time
Posts: 78
Joined: Mon Mar 23, 2009 13:18

Re: video stream problem

Post by Godzil »

GeeEs wrote: Strange enough... I found a similar problem which was related to switching off Vista Aero (theme)...
Strange, but true. "Tearing" is almost gone when i switch Vista to Aero mode. Thanks for advice.

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cosmowe
Knows Resolume better than the devs
Posts: 1304
Joined: Fri Mar 25, 2011 10:27
Location: cologne // germany

Re: video stream problem

Post by cosmowe »

...the output still seems a bit shocky/not fluid
++ PUSH!

Any new solutions? Deaktivate Aero helps against tearing but causes shocky/not fluid video!


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w10 || Schenker U506 || lemur || kp3 || pulse || leap motion || magewell capture dongle

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