The ability to add custom interpretation settings by modifying the interpretation rules.txt file is unfortunately not enabled in Premiere Pro at this time.  In the meantime, I have a workaround if you have After Effects installed.   Steps:   1) Modify the After Effects interpretation rules.txt file Win: C:Users\username\AppData\Roaming\Adobe\After Effects\22.2   Mac: Users/username/Library/Preferences/Adobe/After Effects/22.2   and add this line at the bottom then save the file: 0, 0, 0, "0000", * = 23/20/"1.15 PAR", *, *, *, *, *   2) Launch After Effects and choose new project   3) Import all of the files you wish to interpret to 1.15.   4) Select the first clip in the project panel, right click and choose Interpret footage\main   5) Under other options find the 1.15 PAR setting under Pixel aspect ratio   6) Right click on the same clip and choose Interpret footage\Remember interpretation   7) Select all of the other clips, right click and choose Interpret footage\apply interpretation   8) File menu\export\export Premiere Pro Project, then save the Premiere project.   9) Launch Premiere Pro and open the previously saved project.  All the clips should now be using the 1.15 PAR from After Effects.   Hope this helps and feel free to PM me if you have any follow up questions. ... View more