If this file came from a security camera system (CCTV) manufactured by , the extension is likely supposed to be .ev4 (or sometimes .ev3 ).
Open the file in a hex editor or even a basic text editor (like Notepad++). Look at the first few lines of code (the "header"). You might see a brand name or a software suite mentioned. Searching for that brand along with "EPV player" will usually lead you to a legacy download page. 3. Use a Universal Codec Pack
If this file came from a security camera system (CCTV) manufactured by , the extension is likely supposed to be .ev4 (or sometimes .ev3 ).
Open the file in a hex editor or even a basic text editor (like Notepad++). Look at the first few lines of code (the "header"). You might see a brand name or a software suite mentioned. Searching for that brand along with "EPV player" will usually lead you to a legacy download page. 3. Use a Universal Codec Pack epv file player exclusive