Intermittent tearing

[brightpipe]

I'm doing a large LED wall driven by 2 outputs from Resolume and keep intermittently getting tearing across the seam where the 2 inputs meet.

Both outputs from the PC are on the same video card - a Nvidia 3070, and they go to a single processor a Novastar H5. So I don't think this is a hardware sync issue.

I believe its a software issue as it is intermittent and usually re-starting Resolume will clear it up for a while. Also, if I take a video clip and just play it in MPC-HC and drag it on the desktop so its bridging the 2 outputs I don't see any tearing there either.

Any ideas what may be causing it and how to avoid it? Restarting Resolume in the middle of our event isn't really an option.

[Arvol]

Quadro cards will prevent tearing. GeForce cards outputs will tear if on the same canvas.

[brightpipe]

I thought that was only the case when using multiple cards. I only have 1 card, and using 2 DP outputs on it. I don't see the issue if I use a normal video player. It's also intermittent in Resolume. It will show up sometimes and as soon as I re-start Resolume the issue goes away. Seems to indicate its a software issue not hardware, no? I guess I can try an older Quadro card I have.

[Arvol]

No, GeForce card outputs are NOT sync'd. Quadro's are.

[brightpipe]

No, GeForce card outputs are NOT sync'd. Quadro's are.

I just replaced the video card with a Quadro RTX A4000 and the problem remains. Plays in sync for a while, then after a while gets badly out of sync, then if I leave it for a while it will come back into sync again.

[Arvol]

what is your signal flow?

[brightpipe]

I'm coming out of 2 DisplayPort outputs into 2 Inputs on a Novastar H5 Splicing LED processor. Each output is running at 4608 x 1728, it's the Left and Right half of the wall. The Composition is 9216x1728. The left half is DP 1, right half is DP2. Each side of the wall is also on it's own separate 20 output sending card. I did offset the seam where the 2 inputs come together from where the 2 outputs come together. The tearing remained on the seam between the 2 inputs, not the one for the 2 outputs.

After switching to the Quadro card I also tried to make a Mosaic Output which creates a single 9216x1728 monitor and assigning that as the output monitor in Resolume. But after doing that Resolume consistently crashes after running for about 10 minutes. After disabling Mosaic it's stopped crashing, but am getting tearing again.

One other thing I should note, I'm still on v7.3.2. Looking for a comprehensive changelog that lists all the updates/fixes to see if a newer version fixes the issue. I can try some newer versions to see if that fixes it. If the latest version will fix the issue I'll pay for the license renewal. But if they're just feature updates I probably don't need that.

[Arvol]

Yeah, That should work perfectly. In terms of Arena update pertaining to hardware output and tearing (or lack there of) I don't believe anything has been touched on that topic in years, so you should be good off with the version you are currently running.

Funny enough I'm working on my H9 as I type this right now (Playing with it's built in AOI). I haven't ever had issues with the H series tearing across multiple inputs and outputs. The point of the H series is to have everything on the same clock to prevent this from happening.

I wouldn't use mosaic and just use each output as a normal output with x/y offsets.

I'm chatting with Nova right now regarding AOI and layer limits for the H series. I can reach out to see if there has been any changes via firmware that may have introduced this? (I'm still rocking the OG firmware that shipped with them last year.)

In theory, what you're doing with the Quadro (in non mosaic mode) should work perfectly, as that's the same setup I've been doing for a year now without issues.

[Arvol]

Nova said to turn on mosaic. Might be worth re-visiting. (make sure drivers are up to date)

[vjkatza]

I'm coming out of 2 DisplayPort outputs into 2 Inputs on a Novastar H5 Splicing LED processor. Each output is running at 4608 x 1728, it's the Left and Right half of the wall. The Composition is 9216x1728. The left half is DP 1, right half is DP2. Each side of the wall is also on it's own separate 20 output sending card. I did offset the seam where the 2 inputs come together from where the 2 outputs come together. The tearing remained on the seam between the 2 inputs, not the one for the 2 outputs.

After switching to the Quadro card I also tried to make a Mosaic Output which creates a single 9216x1728 monitor and assigning that as the output monitor in Resolume. But after doing that Resolume consistently crashes after running for about 10 minutes. After disabling Mosaic it's stopped crashing, but am getting tearing again.

One other thing I should note, I'm still on v7.3.2. Looking for a comprehensive changelog that lists all the updates/fixes to see if a newer version fixes the issue. I can try some newer versions to see if that fixes it. If the latest version will fix the issue I'll pay for the license renewal. But if they're just feature updates I probably don't need that.

Just install the trial of the latest 7.13.2 for testing.