Replacing footage in sequence with footage from bin while keeping clip effects via API

Question

Hi,

I'm writing a script to automatically replace the footage inside a Premiere timeline with graded versions of the same footage. Problems arise when multiple instances of the same source file are used in the edit and have recieved different color grades: now the script iterates through the timeline, swapping the footage via changeMediaPath() but changing the filepath for EVERY instance of the original clip, leaving all of them looking the same in the timeline.

I tried importing all graded footage into a new bin to be able to have multiple file path references for every grade, but there doesn't seem to be a function within the Premiere API to replace footage from within a bin.
I found the correct function for AfterEffects (replaceSource()), but I need something similiar to work for Premiere, while keeping all effect properties, masks, transforms and so on in place.

Is there any way to achieve this?

P.S.: A way to copy and paste attributes like it is possible in the GUI but via the API would also work, is there something I missed to do this maybe?

Bruce Bullis · Accepted Answer

The current approach is the former. The editor renaming the trackItem would be an issue at this point, that is a good point.
My script checks for multiple instance of the same name within the trackItems and renames the duplicate trackItems in ascending order ("test_clip_1.mov, "test_clip_2.mov"). Baselight names the multiple grades of the same media in the same way, so there should always be a newly imported projectItem corresponding to every trackItem's name.

I'm still working on the intricacies of the trackItem -> new projectItem matching process, but the main holdup for me currently is the simple redirection of a trackItems reference to a new projectItem, since i'm working on a proof-of-concept for my thesis

Doesn't simple replacement work? the projectItem of a trackItem is a read/write field. 🙂

Bruce Bullis · Answer

> Problems arise...What is the problem? What is your selection criteria, for "trackItems for which I want to replace the source media"? If you have new rendered media, why not import it as a new projectItem, instead of changing the path (but not the applied footage interpretation) of the previously-existing media?

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