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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
I've found good success using the Headless (NDI input) using vingester.app, assuming you have a decent CPU. The OBSN Electron app (as noted by Steve, obs.ninja creator) also works well: (https://github.com/steveseguin/electroncapture) . vMix Browser source seemed to eat up resources quicker that the two methods I mentioned previously. Let me know if you have any questions vs vmixcall. Also worth mentioning advanced.vmixcall.com is out of beta and available, though I can't remember if this is still limited to 720p.
I've found good success using the Headless (NDI input) using vingester.app, assuming you have a decent CPU. The OBSN Electron app (as noted by Steve, obs.ninja creator) also works well: (https://github.com/steveseguin/electroncapture) . vMix Browser source seemed to eat up resources quicker that the two methods I mentioned previously. Let me know if you have any questions vs vmixcall. Also worth mentioning advanced.vmixcall.com is out of beta and available, though I can't remember if this is still limited to 720p.