Magewell Capture Card Flickering

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audeyoe
Met Resolume in a bar the other day
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Magewell Capture Card Flickering

Post by audeyoe »

Hi all. Long time lurker and Resolume user, first time I have an issue that I can't find an answer for in this forum or the docs.

It would take too long to fully describe the setup, but here's the gist: We're doing virtual events. We'll have multiple Zoom calls running on multiple computers in gallery view, which then come into Resolume via a Magewell Pro Capture Quad SDI. Each of these sources is then duplicated onto multiple layers with separate crop values, so that we end up with independent layers, each containing the video box of a single Zoom call participant. We can then move them around and add graphic overlays and underlays and such.

Most of the time this works fantastically well. But every now and then, the sources start flickering. The flickering is fast, maybe 1 frame at a time, and seems to happen across several but not all of the individual layers. It happens at a random, unpredictable interval, and sometimes is quick and frequent and sometimes is more slow and intermittent. But here's where it gets weird: rather than what you'd expect, where it would flicker to a black image or a white image or even a corrupted image of what it's supposed to be, what gets shown in the flicker is the video from a DIFFERENT input on the capture card. It usually seems to be the adjacent input, and is usually upside down. Sometimes we're able to get it to go away by manually changing the resolution or frame rate and changing it back, or by setting it specifically to its framerate rather than the auto mode. But it always comes back.

Drivers and firmware are all up to date. I've verified that there isn't an issue with the card itself by using a different software (OBS) to bring in the inputs and had them run for hours and hours with no issue. I know that this setup can work, because we will have very successful periods of time that this doesn't happen at all, and also because we have another location using the same Resolume patch but with a Blackmagic Quad SDI card instead and they don't have any issues with it.

If the answer is to just replace the card, I suppose that's what we have to do, but that thing isn't cheap and I'd really prefer to just get it happy since it works so well most of the time.

resolumejunkie
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Re: Magewell Capture Card Flickering

Post by resolumejunkie »

Hi,

I am not a Resolume user anymore and everyone here hates me. And, I am sure you have your reasons for your workflow. But, you are aware of the multitude of Zoom to NDI conversion software, right? Some don't have audio. But, you're smart. You can find a way around that.

https://www.liminalet.com/zoomiso

https://andresavic.gumroad.com/l/zoom-ndi-bridge

Also, Zoom Rooms ($50/month) have NDI outputs. Hope this helps!

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Arvol
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Re: Magewell Capture Card Flickering

Post by Arvol »

Not sure if you have to use zoom, but I've found that end users using a webcam/mic and obs can send to this app:
https://garaninapps.com/rtmpminiserver

and then have this app send to Resolume and it works pretty great.
Just thought I'd share.

No clue on the flickering. Drivers up to date? Resolution and frame rates all on the proper settings?

Zoltán
Team Resolume
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Location: Székesfehérvár, Hungary

Re: Magewell Capture Card Flickering

Post by Zoltán »

Are you using the latest Resolume release?
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Control Your show with ”Enter” - multiple Resolume servers at once - SMPTE/MTC column launch
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audeyoe
Met Resolume in a bar the other day
Posts: 4
Joined: Mon Nov 22, 2021 14:58

Re: Magewell Capture Card Flickering

Post by audeyoe »

resolumejunkie wrote: Mon Nov 22, 2021 18:43 Hi,

I am not a Resolume user anymore and everyone here hates me. And, I am sure you have your reasons for your workflow. But, you are aware of the multitude of Zoom to NDI conversion software, right? Some don't have audio. But, you're smart. You can find a way around that.

https://www.liminalet.com/zoomiso

https://andresavic.gumroad.com/l/zoom-ndi-bridge

Also, Zoom Rooms ($50/month) have NDI outputs. Hope this helps!
Very aware of it, yes. We've been looking into that option for a bunch of reasons and I know ZoomISO well. We're already using ZoomOSC in this workflow. But we've been unsatisfied with NDI overall coming out of Mac machines and it just seems so unnecessary when we can do it the "old" way and in theory get more reliable results. If this card simply won't work, then maybe we'll go down that road. But this is supposed to work super great and it's frustrating when it doesn't. And that's what I'm trying to solve.

audeyoe
Met Resolume in a bar the other day
Posts: 4
Joined: Mon Nov 22, 2021 14:58

Re: Magewell Capture Card Flickering

Post by audeyoe »

Arvol wrote: Mon Nov 22, 2021 19:46 Not sure if you have to use zoom, but I've found that end users using a webcam/mic and obs can send to this app:
https://garaninapps.com/rtmpminiserver

and then have this app send to Resolume and it works pretty great.
Just thought I'd share.

No clue on the flickering. Drivers up to date? Resolution and frame rates all on the proper settings?
We do have to use Zoom. If we were able to get people to install other apps I'd be using SRT for everything since it reduces latency compared to RTMP but maintains good video quality. And adapts to network conditions. And can be done easily via OBS.

Drivers are up to date, yes. Checked that first. I even tried rolling back drivers just in case, and then reinstalling the updated ones, but no luck. And yes, resolution and frame rates are on the right settings - we've tried in both auto-detect mode and manually forcing it, and it happens in both cases.

audeyoe
Met Resolume in a bar the other day
Posts: 4
Joined: Mon Nov 22, 2021 14:58

Re: Magewell Capture Card Flickering

Post by audeyoe »

Zoltán wrote: Tue Nov 23, 2021 10:32 Are you using the latest Resolume release?
Fair point and such an obvious question. I was assuming this whole time that we were, but somehow I had forgotten that the license we're using was stuck on 7.3.3 as the latest available version. I'll need to look into getting us on the latest version. Have there been updates since then that would be likely to fix this issue?

Zoltán
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Re: Magewell Capture Card Flickering

Post by Zoltán »

A lot has been going on since 7.3.3

You can try to switch the DMA textures to off in the Resolume video preferences.

If that doesn't help, make a backup of your Documents/Resolume Arena folder, and install 7.7, and try again.

Then if you'd like to revert to 7.3.3 you can reinstall it from the bottom of our download page, close the app, and restore the documents folder from the backup.
Software developer, Sound Engineer,
Control Your show with ”Enter” - multiple Resolume servers at once - SMPTE/MTC column launch
try for free: http://programs.palffyzoltan.hu

kapil8589
Is taking Resolume on a second date
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Re: Magewell Capture Card Flickering

Post by kapil8589 »

Hi, I am facing the exact same issue, just bought the quad card today and as you said the input source flickers when you start using 2 or more and there is no pattern to it.
I am running resolume 7.3.3 and yes the same thing the sources seem to suddenly go upside down.
Did you find a solution? And yes as you stated the card works perfectly well with OBS so the card or pcie slot being faulty is ruled out.
Please help.

Zoltán
Team Resolume
Posts: 7088
Joined: Thu Jan 09, 2014 13:08
Location: Székesfehérvár, Hungary

Re: Magewell Capture Card Flickering

Post by Zoltán »

What have you tried so far from the above suggestions?
Software developer, Sound Engineer,
Control Your show with ”Enter” - multiple Resolume servers at once - SMPTE/MTC column launch
try for free: http://programs.palffyzoltan.hu

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