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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.
Two options to record canvas to video file:
1. MediaRecorder (requires browser support) https://developer.mozilla.org/en-US/docs/Web/API/MediaStream...
2. ffmpeg.wasm https://github.com/ffmpegwasm/ffmpeg.wasm/
What’s crazy is that they seem to be using a js (wasm) port of skia.
https://github.com/ExpressiveSuite/SkiaJS
https://github.com/ExpressiveSuite/CanvasEngine/milestones
Also, take a look at the opened issues, and you will see what kind of formats we are planning to support.
https://github.com/ExpressiveSuite/ExpressiveAnimator/issues
One more thing: we will support video exports somewhere in September. Why September? Because that's when WebCodecs will be available in Chromium-based browsers. I hope this helps.