Rocksteady 25 FPS across multiple screens

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rogalag
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Joined: Fri Sep 16, 2011 07:59

Rocksteady 25 FPS across multiple screens

Post by rogalag »

Hi all, it's my first post here! I'm trying to achieve stable 25 FPS across 3 screens, each 1024x768. Clips are converted to DXV codec. Resolume v3.3.2 reports 80 FPS, but output is jerky. It is not a hardware problem- Win7, i7 2,9Ghz, Radeon 6970 graphics and SSD drive. I've tried different codecs ( picvideo, mjpeg) and resolutions- the same jerky movement. It's not a big problem with short clips, but when you deal with 3 min long clips with walking people it is really annoying. It seems that problem lies in software, but maybe I'm wrong. Anyone know solution?

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cosmowe
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Re: Rocksteady 25 FPS across multiple screens

Post by cosmowe »

Hey ho rogalag,

Resolume reports 80fps? and your clips are rendered with 25fps? ..... that could be the reason why u are getting a jerky movement!

25 do not fit into 80! 8-)

Try: Set all your grafikouts to 50Hz and make shure that your display and or projector makes 50Hz too....and try again.

Report back....



greetz
cosmowe
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HerrNieDa
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Re: Rocksteady 25 FPS across multiple screens

Post by HerrNieDa »

longer clips also don't ran smooth in r2, r3 has also some problems with longer videos...
don't know where the problem could be expect resolume itself...
you can try activating vsync or maybe other buffering options in your graphic 3d settings, but i don't think this will help is short clips run smooth and long clips not.

maybe try uploading the clip so the resolume team may can find the problem or may fix this in newer versions ;)
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rogalag
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Re: Rocksteady 25 FPS across multiple screens

Post by rogalag »

Hi, Thanks for your replies!
OK, I've checked graphics - 60hz, projectors are on 60hz as well.So I've rerendered video at 30FPS. In video editor clip plays smoothly. In Resolume ( which reports clips at 30FPS) as it was - jerky. Is it possible that Resolume do not bother if playback speed is floating? I know that in a few days company will release Arena Media server, where smooth playback is crucial. There has to be a simple solution to really steady playback speed. One thing is refresh rate of a card and monitor, other FPS of a video clip. Any video editor is a good example that even working with 120 hz refresh rate your video will play smoothly, am I right? Or I'm doing something wrong? Changing VSync on a graphics card do not help. Usually for video projections I use VVVV without this kind of problems. But sometime it is easier to use commercial software (to short time, to many layers, etc)

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cosmowe
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Re: Rocksteady 25 FPS across multiple screens

Post by cosmowe »

Any video editor is a good example that even working with 120 hz refresh rate your video will play smoothly, am I right? Or I'm doing something wrong?
Can u explain it better? - I do not really know what u mean.



correct me if i'm wrong - VVVV is a realtime animator...it creates visuals from a node based programmer?!
If this is correct I guess that VVVV uses the GPU direct for visual creation. So there is no clipcoding...and its perfect clocked/synced to the framerate of your graficcard. = MASSIVE PURE SMOOTHNESS!!!

greetz
cosmowe
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rogalag
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Re: Rocksteady 25 FPS across multiple screens

Post by rogalag »

Hi cosmowe!
What I'm saying is that there is no problem with smooth playback of 25 FPS video on 60Hz laptop, or 120hz lcd, because those values are not really connected. On a Resolume output monitor I see FPS floating around 60. Sometime 59,12FPS, seconds later 61FPS. I think this info shows how much power is left for effects. If it drops lower than 25 you cannot expect smooth playback of 25FPS clips, but when is higher there is no reason for jerkiness. After few weeks of experiments I think Resolume just do not care if it plays smooth or not. Dont know why? Its ok only for fast vj style mixing. Try ordinary human motion for longer than 10 sec.
As for VVVV- its not only for creating visuals from a node based programming. Its a great tool for preparing multi monitor video installations with many HD streams ,keystoning, interactivity etc. And it can play smooth. It can be synced to fps of your graphics card, only if you want...

nakedchefff
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Joined: Sun Oct 04, 2009 06:42

Re: Rocksteady 25 FPS across multiple screens

Post by nakedchefff »

Hey there!
I also had a problem with 'tearing'. Don't know if that's the problem you describe, but I found a thread here that tackled that problem. You need to select an Aero-theme in the Windows 7 screen layout, and voilà: rock-steady tight video! If you have a basic theme selected, the output and preview window show tearing, at least in w7...

Joris
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Re: Rocksteady 25 FPS across multiple screens

Post by Joris »

It sounds to me like you're experiencing neither a FPS or a tearing problem. Could you contact us directly, with perhaps a video showing the jerkiness?

Thanks!

Joris

rogalag
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Joined: Fri Sep 16, 2011 07:59

Re: Rocksteady 25 FPS across multiple screens

Post by rogalag »

Hi , it's not a tearing problem, but I've checked if changing to Aero under Win7 will cure tearing- and it works, amazing, but video flow is more unstable!
Joris, thanks, I will do that.
Greg

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