Install Free FFmpeg
If you are running Windows, please ignore this page and follow this link.
DownloadHelper relies on the FFmpeg application to perform the actual conversion.
Depending on the system you are running, FFmpeg might be already installed, you may have some maintenance tools to install it (for instance on Linux Ubuntu or Debian, you may type apt-get install ffmpeg) or you can install it manually. In the last case, you will get all the necessary information from the official FFmpeg site.
Tell support if you know of a better FFmpeg binary distribution. We'll make this information shared with other users.