: MP4 is supported by almost every smartphone, tablet, and computer.
The keyword refers to the process of converting or handling video files from Sifang digital video recorders (DVRs) into the standard MP4 format . Sifang is a common manufacturer of security and surveillance equipment, which often uses proprietary file extensions (like .h264 , .dat , or .av ) that are difficult to play on standard media players like VLC or Windows Media Player. Why You Need to Convert Sifang Files to MP4
If you do not have the original software, third-party tools designed for forensic video analysis or CCTV conversion can help.