The first time you start a download, you may be presented with an alert to install FFmpeg. Simply click "Install FFmpeg" and JDownloader will download and install it for you, after which you will be prompted to restart JDownloader.
The first time you start a download, you may be presented with an alert to install FFmpeg. Simply click "Install FFmpeg" and JDownloader will download and install it for you, after which you will be prompted to restart JDownloader.