FFMPEG commands in JavaScript

Question

Is it possible to use command like: ffmpeg -i video_1920.mp4 -vf scale=640:360 video_640.mp4 -hide_banner to reduce the resolution of a video in the pure JavaScript. For example I got a dropdown menu in which I have < a > tag, so I want to do a video quality selection by clicking on that menu hyperlink with JS. How to implement that properly, please help.

Solution

If you want to do the work in the browser, i.e. on the users machine rather than your server, there are a number of projects which provide an ffmpeg wrapper in Javascript. This one is the most popular at the moment, I believe:

• https://github.com/Kagami/ffmpeg.js?files=1

You would need to do some testing - video processing is very compute intensive and may not work well for you in the browser.

If you want to do it server side, in a Javascript based server like node for example, then again there are libraries available - e.g.:

• https://github.com/fluent-ffmpeg/node-fluent-ffmpeg