RER MP4 Converter - Version 3.7.2 RER MP4 Converter is an outstanding and professional video converter for millions of MP4 users to convert almost all popular video files to MP4 format, or MP4 to video. Easy to use and free download. With RER MP4 Converter, you can convert your video to MP4 (MPEG4) for portable video device, including iPod, iPhone, Zune, PSP, Apple TV in one step.