Several Playstation Movie Players / Converters have been made since the Playstation's conception. These are, undoubtedly, the best programs to use if you want to grab an FMV or image.
PSX Multi Converter (English version)
PSX Multi Converter is an excellent program that allows you to take movies directly from a game disc and turn them into .STR files.
PSMPlay is also an excellent program, however it tends to be slightly buggy sometimes. We recommend PSX Multi Converter over this.
PSXPlay 1.46 (Shareware)