How to integrate ffmpeg.wasm into a serverless Vue SPA

[itsgifnotjiff]

Hello ffmpeg.wasm community, I am having a hard time figuring out how to open a stdin stream so that I can create a mp4 from canvas elements I generate with an async/await for loop. I think I should initialize an ffmpeg instance then add frame by frame the canvases and then compile the final video to be downloaded by the user. I am not sure how to do any of that and so far I have only found examples of transcoding one video into another. I have asked the question on StackOverflow.