OBS - NDI Performance issues

[Juli971Master]

Hey guys,

i recently tried to setup a streaming computer. It is actually my old gaming pc and i thought i could use it for this purpose.

The idea was to stream a 1080p 30fps stream from my and another pc to the streaming pc. On the streaming pc there are also two webcams connected at 720p.

I use OBS with the OBS-NDI plugin on all three computers.

Although they are connected via gigabit and not a single gpu, nor cpu nor ethernet card is exhausted. The NDI stream is stuttering every couple of seconds and sometimes the framerate drops to about 10 fps.

Do you have any idea what could be the bottleneck here? The current bandwith of the streaming pc is around 30MB/s input.

 

Specs: pc 1 i7 7700k;gtx1060(6gb); 16gb ddr4

 

pc 2 i5 8600k;gtx 1060(6gb); 16gb ddr4

 

streaming pc: i7 2770; gtx 950(2gb); 8gb ddr3

 

hyperthreading is enabled on pc 1 and streaming pc

[Juli971Master]

anyone?

[WreckedMech]

So I made a bit of a discovery regarding those lost frames.

 

In a two system setup I was getting major frame drops on the incoming NDI connection. The OBS monitor on the giving side appeared smooth, but the receiving OBS was far from it. The odd solution was to Minimize a browser window i had set to monitor my Twitch broadcast. Not Close, just Minimize, sometimes even tab away from a video playing window. Although i bet closing works too. 

 

My advice if your having the OBS-NDI frame loss issue is to go through your windows and minimize them until you locate the one causing the stutter by being active.

 

Nothing else i found on any forums seemed to help, so hope this does. Just monitor through obs on your stream pc as you minimize different windows, especial browser video windows.