3966 FCPXML Interchange Format Text (Mark-up) FCPXML files are XML-based files used by Apple's Final Cut Pro to describe project data, enabling users to transfer projects, projects, and metadata between Final Cut Pro and other compatible applications. They contain information about media, clips, editing decisions, and other project assets. 299 Brigham Young University / Brigham Young University 04 Dec 2025 04 Dec 2025 fmt/2089 PUID fcpxml File extension 3452 FCPXML Interchange Format Absolute from beginning of file, magic bytes: <?xml version=("|')1.0("|'){0-128}fcpxml 1 Absolute from BOF 0 0 3C3F786D6C2076657273696F6E3D(22|27)312E30(22|27){0-128}666370786D6C Has priority over 638 Extensible Markup Language