I'm using OBS to produce a virtual camera for an online meeting. That works.
I also want to record a local copy of the meeting window, which is basically a video screenshot on the same machine that OBS runs on. But because that video is different from what OBS is doing, I have to use something else to record it, correct? OBS can do a very limited amount of multitrack audio and send different tracks to different places, but there's only ever one picture.
Given that, and the need for this different-picture recording to have its own soundtrack as well, I need to get OBS to share the hardware that it's using for audio input. That hardware is a Behringer X32 digital sound board that offers a 32-track USB "sound card". I have a stereo broadcast mix, completely finished inside the X32, while OBS insists on interpreting tracks 1-8 as 7.1 surround and downmixing that to stereo. So I put the broadcast mix on the front corners 1&2 and keep the rest off, as shown below. (what I'm calling "tracks" here, are called "Outputs" in the X32's settings) The "subwoofer" on track 6 is ignored in OBS, and so I thought I might commandeer that for the mono auxiliary soundtrack. Tracks 9-32 already have their own purpose that I haven't pursued at all yet.
I can record my video screenshot with ffmpeg -f x11grab ..., but when I also point it to that "sound card", it refuses to use it while OBS is running. Likewise for Audacity; it can't see that card either while OBS is running. When I close OBS, *then* the other apps can use the card, so I know they work. Is there a way to make OBS share its raw audio source with something else?
Or I guess if OBS can pass that track through without affecting the stereo broadcast mix - neither streamed nor recorded from OBS, only passed through as a virtual sound card - that would work too.
Or if I'm wrong about OBS only ever producing one picture, and it *can* in fact both produce the meeting feed and record the meeting window at the same time - with different audio for each, cherry-picked out of the same multitrack input - that would be absolutely awesome! I already have a "screengrab" scene that I've used on occasion, which would suffice for that picture, provided that I could simultaneously send a different scene *to* the meeting.
I also want to record a local copy of the meeting window, which is basically a video screenshot on the same machine that OBS runs on. But because that video is different from what OBS is doing, I have to use something else to record it, correct? OBS can do a very limited amount of multitrack audio and send different tracks to different places, but there's only ever one picture.
Given that, and the need for this different-picture recording to have its own soundtrack as well, I need to get OBS to share the hardware that it's using for audio input. That hardware is a Behringer X32 digital sound board that offers a 32-track USB "sound card". I have a stereo broadcast mix, completely finished inside the X32, while OBS insists on interpreting tracks 1-8 as 7.1 surround and downmixing that to stereo. So I put the broadcast mix on the front corners 1&2 and keep the rest off, as shown below. (what I'm calling "tracks" here, are called "Outputs" in the X32's settings) The "subwoofer" on track 6 is ignored in OBS, and so I thought I might commandeer that for the mono auxiliary soundtrack. Tracks 9-32 already have their own purpose that I haven't pursued at all yet.
I can record my video screenshot with ffmpeg -f x11grab ..., but when I also point it to that "sound card", it refuses to use it while OBS is running. Likewise for Audacity; it can't see that card either while OBS is running. When I close OBS, *then* the other apps can use the card, so I know they work. Is there a way to make OBS share its raw audio source with something else?
Or I guess if OBS can pass that track through without affecting the stereo broadcast mix - neither streamed nor recorded from OBS, only passed through as a virtual sound card - that would work too.
Or if I'm wrong about OBS only ever producing one picture, and it *can* in fact both produce the meeting feed and record the meeting window at the same time - with different audio for each, cherry-picked out of the same multitrack input - that would be absolutely awesome! I already have a "screengrab" scene that I've used on occasion, which would suffice for that picture, provided that I could simultaneously send a different scene *to* the meeting.
