Separate OBS Output

[Barry Miller]

I have a Soundcraft mixer which allows me to change or delete sound inputs and then send out an Aux output. Is there a way to do that with video in OBS?

 

[AaronD]

If you want to completely replicate a physical mixer in software, you need a DAW. (Digital Audio Workstation) OBS is not a DAW, and the devs have a brick wall against making it one. For good reason, because DAW's are complicated all on their own, and well-deserving of being their own separate app with a dedicated support team.

But if all you want to do is on/off, OBS does have a mute button, and some rudimentary routing with 6 tracks. You might think of it as if the 6 tracks are all subgroups on your Soundcraft, with no master and no aux. Then the recording is a multitrack recorder on the subgroups, and the stream is a single patch cord that you connect to one subgroup.

I'm not sure if the Monitor is another subgroup, or PFL. You'll have to experiment on that. I don't use OBS's processing at all - all DAW or physical - so it doesn't make any difference to me.

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There's also this plugin, that appears to give you some actual aux outputs. I don't use it myself (DAW or physical, outside of OBS either way), so I can't say anything beyond that.

Audio Monitor

Plugin for OBS Studio to add Audio Monitor dock and filter. It allows you to put the audio of a OBS source to an audio device by adding the Audio Monitor filter on the Source in OBS Studio. This can be useful in different use cases...

obsproject.com

 

[Barry Miller]

Sorry, I didn't specify that I was using the audio mix as an example. What I need to do is all Video.
I need to send a stream as we currently do to the outside world but in the main part of the church I only want to send the graphics, such as PDFs, images or videos that would also be sent into the stream.
Can I cast/send a signal to what would essentially be monitors in the church?

 

[AaronD]

Sorry, I didn't specify that I was using the audio mix as an example. What I need to do is all Video.
I need to send a stream as we currently do to the outside world but in the main part of the church I only want to send the graphics, such as PDFs, images or videos that would also be sent into the stream.
Can I cast/send a signal to what would essentially be monitors in the church?

The common way to do that is to have a dedicated app to drive the local displays, and that's all it does. Then OBS captures that and adds to it for the stream. They could be separate instances of OBS, or you could use something different to drive the local displays, but they're still separate.

It's a good idea to have them on separate machines too, with a physical capture card in between, or NDI across a single network switch in the booth if your presentation app supports that. Install the NDI plugin on OBS's side to receive it.

We actually do both. I have a full-screen physical capture of the audience display, or I can put that in the corner of the frame over a camera. And our lower-third stuff is NDI, which natively includes transparency. So the NDI feed is full-screen on top of the cameras, with transparency for most of it. I also have a hotkey to remove the NDI layer in case we forget to make something transparent.

At any rate, OBS is only good for one fully-produced feed. If you want two produced feeds, then you need two instances of OBS. There are ways to get different content to different places from only one instance, but all except one are severely limited. Always the same scene, for the most common example, because it's literally *that scene* that's being sent out independently.

I have another rig that uses two simultaneous instances of OBS on the same machine, that is both started and shut down from a script, not manually, because there's a fair amount going on to make it all work. Two instances of OBS, in a master/slave configuration with lots of automation, audio in a DAW that interacts with everything, combined local and remote participants, etc. I can post more if you'd like to see that.

 

[Tomasz Góral]

Sorry, I didn't specify that I was using the audio mix as an example. What I need to do is all Video.
I need to send a stream as we currently do to the outside world but in the main part of the church I only want to send the graphics, such as PDFs, images or videos that would also be sent into the stream.
Can I cast/send a signal to what would essentially be monitors in the church?

Yes, read about Projector.
You can build w OBS scene with name like 'only for screen', click on right button and select from menu Projector and display on selected Monitor.
You can control this scene via Studio Mode or shortcut.