Question / Help Running 2 Instances of OBS

[john5788]

I'm trying to run 2 instances of OBS so I can stream one scene and locally record another. My stream scene has overlays and a facecam that I do not want to have in my local recording. I find there is a problem with Xcomposite capture locked to the first instance of OBS so that I cannot use the second instance to record anything. The output is just black and the console output on the second instance repeats this:

error: glCopyImageSubData failed, glGetError returned 0x502
error: device_copy_texture (GL) failed

Is this normal? Is there any sort of workaround for what I am trying to accomplish? Maybe stream to another instance of OBS on another computer/VM and have that OBS put together my overlays?

 

[Fenrir]

Yes, that's normal. There's not a good workaround for what you're trying to accomplish right now, unfortunately.

 

[john5788]

Thanks for the quick response. Can OBS use RTSP as a source? Perhaps I can stream raw gameplay to an nginx server with RTSP module loaded and use that stream to build my overlays? Just trying to think of other ways to do this

 

[Fenrir]

It can, yes, through media source or VLC source. If you run it through nginx-rtmp, you wouldn't even have to run two instances as you could record directly from nginx itself.

 

[john5788]

Thanks, I got this working and did a test run tonight with success.

One instance of OBS is streaming out to an nginx-rtmp server and recording locally to disk using NVENC CQP25 1080p60. The second instance of OBS is streaming out to Twitch using the RTMP server as a source along with all my overlays and facecam using x264 encoder 720p60 @ 3000k CBR.

Only issue I have is the latency from the nginx server. It is about 1100ms and I have to add the same delay as a filter for my webcam on the 2nd instance of OBS that sends out to Twitch. Otherwise my VOIP audio (part of RTMP stream) does not sync with webcam video feed.

 

[Fenrir]

If you need to delay your audio sources, go to Edit -> Advanced Audio Properties and adjust the Sync Offset (ms) field. If you need to delay your video sources, add a Video Delay (Async) filter. Note that Display, Window, and Game Capture cannot be delayed.

 

[john5788]

Fenrir, one more question regarding "Media Source" source.

I am noticing the audio is a little bit glitchy with this method of input using an RTMP stream. This bug report summarizes what I am experiencing: https://obsproject.com/mantis/view.php?id=450

I do not see a VLC option out of the box and I don't see any plugins for OBS Studio Linux for VLC Source. Is this something I automatically get once I compile/install VLC on my system?

Edit: I compiled/installed VLC on my system, but the plugin was still not loading/present. I looked at the cmakefile and it seems like the detection of VLC is done at that level. Recompiling obs-studio from source and installing allowed the vlc-video-plugin to be built and installed.