What is a TPI file? A TPI file is a plugin file employed by EDIUS, a video editing application software. It enhances the video editing capabilities, typically crafted to incorporate new file formats or apply adjustments such as video color correction, lighting effects, motion blurs, and various other visual enhancements. About EDIU Video Editing Software Thomson EDIUS is a non-linear video editing software developed by Grass Valley, a subsidiary of Belden Inc.