Free DVR-MS 2 MP4 Fast Convert it is a good program for you if you want to convert DVR-MS to MP4 accidently. Free DVR-MS 2 MP4 Fast Convert, as its name, is free and can be used to convert DVR-MS to MP4. It can convert at superfast speed and the converting result is relatively good. The interface is really simple, so it's easy-to-use. You can master it even without any help. It is a professional DVR-MS to MP4 converter.