RMVB (RealMedia Variable Bitrate) is a file format created by RealMedia for RealPlayer. The easiest way to open RMVB files is to download and install RealPlayer, because other media players may have trouble opening files in this format. However, if you don’t want to install additional media playing software, you’ll probably have to convert the RMVB files to a more common video format, for example, MP4.
One easy way to convert RMVB to MP4 is to use Movavi Video Converter. This simple yet effective multifunctional program allows you to not only change your files’ format from RMVB to MP4, but also to rotate, crop, stabilize, and otherwise enhance your clips.
You’ll find a simple guide on how to convert RMVB to MP4 below.