There's an example of that here: https://blog.scottlogic.com/2020/11/23/ffmpeg-webassembly.html https://blog.scottlogic.com/2020/11/23/ffmpeg-webassembly.ht...

There's an example of that here: https://blog.scottlogic.com/2020/11/23/ffmpeg-webassembly.html https://blog.scottlogic.com/2020/11/23/ffmpeg-webassembly.ht... <ctrl-f>Creating a Streaming Transcoder