Hello,
I'm doing something a little different with OBS where I'm using it more a "presenter" video software than for streaming.
I'm working in a screening room situation where I will do live two way Zoom or Teams calls from time to time. In the past, this has worked fine with Zoom. A general setup in Zoom is to send video to the screen via HDMI on the projector. It comes out of the computer into a HD Matrix which separates audio and video into two feeds. Audio from the switcher goes to a cinema processor which plays through the theatre's stage speakers and the video feed goes direct to the projector's input.
So that you can hear the audience in the room on Zoom, I have a handheld mic that goes into the computer as an input. I setup a small logitec camera in the theatre so the zoom participants can see and hear the audience. I've done it twice and works better than you would think.
I want to use OBS so I can control other scenes to the screen with audio, which I can then feed back into Zoom as a virtual camera. I can use my Decklink 8K card to output SDI to the projector's SDI input while outputting Audio via headphone jack or any other audio connection to the cinema processor. I'd figured the SDI would be a better video connection. This works fine.
But, although I get perfect video and perfect audio, they are out of sync by 200ms due to the lag in the video card in the projector and the Decklink. The sound is ahead of picture by around 7 frames. This is expected. Normally, we set sync in the video software like when we use Resolve or Baselight for playback. But there is always some way to set sync on the software side.
I don't see a setting in OBS where I can offset the monitor output to match the video on SDI. When I go to the Advanced Audio Properties and offset the SYNC for that audio output, nothing happens. From what I read, this sync function is only for the streaming output and not the monitor. Is that correct?
Do I have the audio monitoring set up wrong?
Is there a way to change this sync either through a setting in OBS or a plugin applied to that scene?
Unfortunately, unless I go into the Cinema Audio Processor as AES I can't offset those standard inputs to the processor and will need an external way of controlling it.
Also is there a way to embed the monitor audio within the SDI link feed where I can use a BMD Deembedder to AES (which is what we normally use to send the PCM to the Cinema Processor).
I'm doing something a little different with OBS where I'm using it more a "presenter" video software than for streaming.
I'm working in a screening room situation where I will do live two way Zoom or Teams calls from time to time. In the past, this has worked fine with Zoom. A general setup in Zoom is to send video to the screen via HDMI on the projector. It comes out of the computer into a HD Matrix which separates audio and video into two feeds. Audio from the switcher goes to a cinema processor which plays through the theatre's stage speakers and the video feed goes direct to the projector's input.
So that you can hear the audience in the room on Zoom, I have a handheld mic that goes into the computer as an input. I setup a small logitec camera in the theatre so the zoom participants can see and hear the audience. I've done it twice and works better than you would think.
I want to use OBS so I can control other scenes to the screen with audio, which I can then feed back into Zoom as a virtual camera. I can use my Decklink 8K card to output SDI to the projector's SDI input while outputting Audio via headphone jack or any other audio connection to the cinema processor. I'd figured the SDI would be a better video connection. This works fine.
But, although I get perfect video and perfect audio, they are out of sync by 200ms due to the lag in the video card in the projector and the Decklink. The sound is ahead of picture by around 7 frames. This is expected. Normally, we set sync in the video software like when we use Resolve or Baselight for playback. But there is always some way to set sync on the software side.
I don't see a setting in OBS where I can offset the monitor output to match the video on SDI. When I go to the Advanced Audio Properties and offset the SYNC for that audio output, nothing happens. From what I read, this sync function is only for the streaming output and not the monitor. Is that correct?
Do I have the audio monitoring set up wrong?
Is there a way to change this sync either through a setting in OBS or a plugin applied to that scene?
Unfortunately, unless I go into the Cinema Audio Processor as AES I can't offset those standard inputs to the processor and will need an external way of controlling it.
Also is there a way to embed the monitor audio within the SDI link feed where I can use a BMD Deembedder to AES (which is what we normally use to send the PCM to the Cinema Processor).