Unknown Video Stuttering Issue

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Hex21189
Met Resolume in a bar the other day
Posts: 3
Joined: Mon Jan 07, 2019 08:49

Unknown Video Stuttering Issue

Post by Hex21189 » Mon Jan 07, 2019 09:14

Hey everyone, I'm trying to fix an old bug with a resolume project my company is working on where in a video of a snow storm we experience random stuttering every 5-10 seconds of a frame or two. Normally this is pretty hard to see on a traditional 4k monitor (personally I don't have an eye for these details so my artist coworkers have to point it out to me) but this is a pretty jarring effect when we project the contents on to a movie theater size screen. Basically the 2 or 3 pixel shift snow flakes experience turns into a jump of a several inches or feet.

Currently in my test environment I am using Resolume Arena 6.1.1 Rev61728. My contents contain 3 movies all DXV3.0, with sizes of 5.18 gb, 1.28 gb, and 0.7 gb, with 2 to 3 minutes of footage each, 30 fps, and two of which have 1080p resolution and the final at a weird 2972x1080 progressive resolution. The two 1080p videos are then layered on top of each other and rendered out to a 4k monitor (which is where we see the stuttering) and the weird one is applied to a weirdly mapped plane and rendered on a normal 1080p monitor.

So far I tried debugging my hardware and found that the SSD is running at a normal rate, rarely exceeding a 100 kbs transfer rate. Only 3.2 gb of the 32 gb installed ram is in use, of whicc 400 mb is in use by Resolume. Processing power is getting clocked in at 6-8% and the GPU of the 1080Ti card is running at about 17% with 0.7/24 gb memory in use. I also went through the NVidia Control Panel and set the 3D settings to optimize performance in Power Management and Texture Filtering.

At this point I'm not really sure what else to do. This use case seems well within Resolumes ability especially given the hardware it is running on but some how something must be configured incorrectly. I've gone through just about every forum post I can find that mentions stuttering and none of the suggested solutions seem to work with my projects issue.

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Zoltán
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Re: Unknown Video Stuttering Issue

Post by Zoltán » Tue Jan 08, 2019 11:10

Try setting the composition frame rate to 30FPS in the Composition - Settings.
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Hex21189
Met Resolume in a bar the other day
Posts: 3
Joined: Mon Jan 07, 2019 08:49

Re: Unknown Video Stuttering Issue

Post by Hex21189 » Mon Jan 14, 2019 10:08

Hey Zoltan, thank you for the suggestion. Unfortunately we really need the output to run at 60 fps if at all possible. I did however try setting it to 30 fps and the noticeable stutter still intermittently occurs. No idea why.

I also just recently tried recreating the project using only the 3 videos that I mentioned and the issue is still present. The only other thing I can think to mention is that a couple simple effects were added as well, one for brightness and contrast to one movie and another for a mask with no source image (I'm not sure why we have this effect but I added it in for recreation purposes).

deepvisual
Hasn't felt like this about software in a long time
Posts: 77
Joined: Thu Mar 31, 2011 15:49

Re: Unknown Video Stuttering Issue

Post by deepvisual » Mon Jan 14, 2019 11:03

isn't the best place to start the footage?
If it's been converted or made badly you'll have judder you can't fix any other way.
test it in a different player.

Hex21189
Met Resolume in a bar the other day
Posts: 3
Joined: Mon Jan 07, 2019 08:49

Re: Unknown Video Stuttering Issue

Post by Hex21189 » Tue Jan 15, 2019 03:12

Hey Deepvisual, thanks for the suggestion. I actually already checked the videos individually using Resolume Alley and they seem to be fine. I should have included that in my first post. Sorry about forgetting to add that piece of information.

One more thing I should have mentioned is that two of the three video layers use the "Add" blend mode and the third use "50 Add". I doubt this causes much of a problem but the idea of alpha channels in videos scares the crap out of me. I am afraid of no man, but that alpha channel... it scares me.

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