How to read audio destination in @revideo/player into MediaRecord?

[tangshuang]

I am now using @revideo/player to provide a video previewer for the users.
I want the user be able to download the video, currently I use MediaRecorder to record from canvas and use ffmpeg.wasm to merge mp3 and mp4, but because of #290 , the sound and vision are not sync, sound is always quicker.

My thought is to record audio from @revideo/player directly, however after review and seek from source code, I try to use MediaRecord to record from <revideo-player>.player.audio.context but not success, and could not find how the audioContext plays the audio.
Could you help?

[justusmattern27]

@tangshuang full client-side video exports are not supported right now - the supported way to render is on the server with renderVideo: https://docs.re.video/api/renderer/renderVideo/