Pinnacle Studio Project File
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What is an STU file?
A STU file is a project file created by early versions of Pinnacle Studio, a program used to create and edit videos. It stores all project information, including video, audio, effects, and timelines. Pinnacle Studio no longer supports STU files.
Pinnacle Systems replaced STU files with the .STX project format. Before replacing the STU format, Pinnacle Studio saved and loaded video projects stored in STU files. Users saved projects as STU files to preserve editing progress, then exported the files to common video file types such as .AVI and .M4V.
How to open an STU file
Pinnacle Studio no longer supports STU files. You can only open the files with early versions of Pinnacle Studio, such as version 2.