I used 8 browsers just last week to capture auction lots, along with 80 other inputs, mix of NDI and 3 4K cmarea feeds in virtual sets, recording and sreaming to 2 locations. Not even close to maxing out an i9X, I think was sitting at 10 percent. what's your setup?

I've seen a new Dekll PC crawl to a halt with a simple browser, it depends on what's in the browser and what else is running on that VMix machine, like for example Youtube and Vimeo dashboard, that will absolutely take down any VMix setup.

I rarely capture from Twitch, but their interface is an absolute resource hog. If anything, you could capture from another machine using VMix desktop capture.i It doesn’t sound like your machine is the issue, we have near identical specs except that we have Titan RTX cards.

OBS is much less complex than VMix, so I would expect it to be easier on processing. Last question would be, do you have the very latest NVidia driver? Since the previous version causes GPU overload in vMix.

The thing is there’s nothing to decode. We are talking browser, not video

My guess is that if you opened 10 browser windows with Twitch.tv, your CPU would start spiking as well. Are you capturing chat areas?

For some sites I get better performance with hardware acceleration of the browsed disabled. Definitely worth trying the different versions.

As for webm, why not just convert to a more production friendly codec?

Yeah i second this complaint. The web browser feature in vMix is broken or doing something way beyond what it needs to do. I'll have a few web browser that brings in real-time overlay data and the send it kicks off, it will bring vMix to a halt where OBS it doesn't even touch it. I try and avoid HTML overlays but in my line of work (esports) their very common. And again the exact same link will not touch OBS but will spike render times and shoot CPU up to the roof for the same overlay alert.

But I also found that unchecking using hardware accelerator sometimes will do the trick but most of the time its a 50/50 shot if that overlay is going to bring my production to its knees. For example, the charity ticker and bar in Streamlabs can kill vMix.

Recap:

3 Streamlabs alerts in vMix using the web browser input can equal 100% cpu and drop frames
The exact same alerts in OBS doesn't even touch the cpu.

But I'm not going to say anything crazy like I'm leaving vMix :) that's just silly talk. but I would like to see a more officiant web browser input.

-King