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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'm not really sure to be honest, I'm still trying to learn more about the Linux multimedia stack. I tried testing this with Clapper which is a GTK player powered by GStreamer. It also says it uses OpenGL for rendering. However when I tried it with my custom compiled version of GStreamer I didn't get any performance increases, which makes me think there's some extra copies happening. It's possible I'm still missing some necessary environment variables to enable the correct decoding/rendering path.