Resolume Forum

hello friends, first of all, if anyone has found a solution for the stuttering problem at the junction of 2 outputs on led screens in multi-screen connections, please contact me.

the system i am using
led screen 3.9mm indoor (2 mctrl 600 sending cart )
gtx 2080 gpu
2out 1920x1080
I have a stuttering problem at the intersection of the screens.

I want to find a solution via the existing gpu, not with a device like datapatch fx4 or magnimage matrox.

If anyone can help, please contact me.

I don't know if it would work, but you could try syncing the outputs of your Nvidia GPU with (1) Blackmagic Sync Generator and (2) Blackmagic UpDownCross HD converters.

No idea if that will work to sync the outputs, but it's the only thing that comes to mind.

@resolumejunkie:
This is not how frame syncing works. The way you are describing just syncs the two Up down cross converters with each other the input to them is totally unaffected.

@birolakay:
You are talking about a "stuttering problem".....and mentioning fx4, matrox in the end of your post. These devices are not suitable to fix video stuttering. These devices can split your output to help you with frame syncing issues.


Look here... Look at 14 fps ...this is what would be commonly described as an evenly stuttering video. If this would be uneven, you have a stuttering video.

Is that your problem?

Since it's at the junction, I am interpreting "stutter" as screen tearing.

FX4 will fix this. Mctrl 660 is a 3G device. You can go 12G into a FX4 and then split that into (4) sync'd 3G outputs. That would be the cheapest solution that is stable. You could also look into getting a Quadro series card (double the memory you would need in a standard Geforce series card) if you have a desktop as these cards all share the same clock on their outputs. The only other suggestion is to use a Matrox but those are hit and miss (not a fan personally). Beyond that, those are the only options that will get you.

cosmowe wrote: Sat Jul 30, 2022 17:27 @resolumejunkie:
This is not how frame syncing works. The way you are describing just syncs the two Up down cross converters with each other the input to them is totally unaffected.

Have you tried it?

You would have to sync the output signals at the source, which the 2x series of GPUs is not capable of. You would need a Quadro card and the associated sync card to sync the GPU outputs.

If the LED are side by side and there is noticeable timing difference between the 2 screens (strobing, content moving across screens at different times), you need a video wall/display wall controller like the datapath x4/FX4, you would send the data path 1 signal, and let it split the signal the to screens for you

dirtyjohn_lv wrote: Wed Aug 03, 2022 19:01 You would have to sync the output signals at the source, which the 2x series of GPUs is not capable of. You would need a Quadro card and the associated sync card to sync the GPU outputs.

If the LED are side by side and there is noticeable timing difference between the 2 screens (strobing, content moving across screens at different times), you need a video wall/display wall controller like the datapath x4/FX4, you would send the data path 1 signal, and let it split the signal the to screens for you

Sync card is only to sync multiple GPU's. A single Quadro GPU's outputs are already sync'd by nature.

Arvol wrote: Wed Aug 03, 2022 19:45

dirtyjohn_lv wrote: Wed Aug 03, 2022 19:01 You would have to sync the output signals at the source, which the 2x series of GPUs is not capable of. You would need a Quadro card and the associated sync card to sync the GPU outputs.

If the LED are side by side and there is noticeable timing difference between the 2 screens (strobing, content moving across screens at different times), you need a video wall/display wall controller like the datapath x4/FX4, you would send the data path 1 signal, and let it split the signal the to screens for you

Sync card is only to sync multiple GPU's. A single Quadro GPU's outputs are already sync'd by nature.

That or external clock sync

kman1898 wrote: Tue Aug 16, 2022 22:23

Arvol wrote: Wed Aug 03, 2022 19:45

dirtyjohn_lv wrote: Wed Aug 03, 2022 19:01 You would have to sync the output signals at the source, which the 2x series of GPUs is not capable of. You would need a Quadro card and the associated sync card to sync the GPU outputs.

If the LED are side by side and there is noticeable timing difference between the 2 screens (strobing, content moving across screens at different times), you need a video wall/display wall controller like the datapath x4/FX4, you would send the data path 1 signal, and let it split the signal the to screens for you

Sync card is only to sync multiple GPU's. A single Quadro GPU's outputs are already sync'd by nature.

That or external clock sync

You can't interface an external sync clock to a GeForce series GPU, that's only for camera's and LED controllers (That support it).