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obs-ndi - NewTek NDI™ integration into OBS Studio 4.9.1

Multicasting
It appears that this NDI plugin may not support multicasting. With multicast enabled 1Gb switches, and endpoint NDI decoders set to pull from a single multicast feed, the signal is still replicated in OBS. A single signal results in eating up ~700Mbps due to our multiple endpoints, and this is problematic since we are also live streaming, so had to turn down the baud to prevent dropped frames.
Can anyone confirm if it supports multicasting, and how to enable it?

Alternative NDI integration with OBS
If it does not support multicasting, is there another efficient way to integrate NDI with OBS?
We use both encoding and decoding of NDI in OBS.

Thank you

Yep, this should help

 

imeiul

New Member
I believe that is the way NDI is supposed to work. It will transmit as long as it is being received but when playback stops so does the transmission so bandwidth isn't being wasted on the network.
But is a dedicated output. I think that is supposed to transmit a dedicated resource constantly.
 
Doesn't matter, nothing on the receiving end, no transmission, no wasted bandwidth. Try using OBS in Studio mode, you might get lucky.
 

imeiul

New Member
Doesn't matter, nothing on the receiving end, no transmission, no wasted bandwidth. Try using OBS in Studio mode, you might get lucky.
I already use OBS in Studio mode. I performed more tests to try to isolate the cause of the problem and realized that it only occurs when I use the window capture source. It doesn't happen when I use the screenshot source or capture device. It is as if obs disables window capture when the scene is not active. There is an option to disable some fonts when they are not active, however there is no for window capture source.
 

VBR

New Member
Hello. I'm trying to use the obs-ndi plugin to transmit the capture of an application window (Zoom) from one pc to another, through a filter in the scene or in the source. While the scene is selected and consequently displayed in the preview, the transmission occurs normally, however when I select another scene, the transmission stops, freezing the image. I would like to stream the window to the second pc constantly. can anybody help me?
Add the first scene to the second scene and place it on the bottom layer. It won't show up in the preview and the Zoom stream will continue.
 

markw

New Member
Hi, just new to OBS and NDI,

Have got it all working well on New MacBook Pro
However - when I turn off camera shut computer - it looses the NDI Source in OBS.

I have to restart the computer - then all is working fine again.

What am I missing ?

Many thanks

Mark
 

Acey05

New Member
Older versions of OBS basically, before the 27 branch or when NDI was still using "Network Timing" by default. Those had the best compatibility between each other.
 

Jaybonaut

Member
Older versions of OBS basically, before the 27 branch or when NDI was still using "Network Timing" by default. Those had the best compatibility between each other.
What do you use for Sync settings now, Network or Source? Does it make a diff? What about Latency mode, Normal or Low?
 

Acey05

New Member
Normal didn't have the Stutter or Audio "pops", and Network was the best option if both PC's aren't time synced since, as the name implies, it's using your Network to time the Sync. This is/was the best options.

However, currently Source Time with Low Latency since for a while OBS and NDI where a nightmare to run (the desync was almost instant, it constantly stuttered, had to reset my router after every stream, starting a new software would stagger the whole stream and required restarting OBS) and stuck with it for now.

I haven't tried going back because I don't know how well they will work.

You can try recording something small on the second PC for a couple of minutes, you might get lucky and it works for you perfectly.

PS: You can try Output Filters, those bypass most issues but they require extra power on your second PC and a very good Network system, otherwise OBS/NDI will disconnect your second PC from the internet constantly.
 
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