in an application I am developing, I am getting a WebM file and converting it to mp3 using ffmpeg in the browser (built with emscripten) (ffmpeg.js).

I've been having a few issues with the duration of the output mp3(Stack Overflow Question) and I'd like to try a different library. Have been searching for a while but no luck so far.

Recently I came across lamejs but I cannot use that to convert WebM directly to mp3 (Issue 68).

Does anyone know any other libraries I could use in the browser in order to convert webm files to mp3? Or how could I convert a webm file to PCM in order to try lamejs.