RecordRTC
RecordRTC is WebRTC JavaScript library for audio/video
...It can record audio, video, screen activity, canvas animation, and combined media sources through WebRTC-related browser APIs. The library supports common modern browsers across Windows, macOS, Linux, Android, and selected iOS or Safari use cases. Developers can use promise-based or callback-based recording flows, then retrieve blobs for saving, uploading, or playback. It offers multiple recorder strategies, MIME type options, time-sliced blob delivery, CDN usage, npm installation, and many demos. RecordRTC is useful for screen recorders, webcam capture tools, audio note apps, browser tutorials, and media recording prototypes.