Matchbox hangs when making shot track from video file, PT 2025.10

Working on a feature doc, ~90mins. New picture revision has come in, for some reason Matchbox is having trouble creating a new shot track. No need for conform since the revision was just some B-Roll adjustments.

Deleted my old shot track in PT from the last revision, but when making the new one MB gets about 10-15 shots in, then slows down tremendously and stops creating new clips or markers. If I let it finish I just get a mostly empty shot track except for the few at the beginning.

I tried transcoding the video clip to a few different formats & smaller resolutions, which has helped me in the past, but this time no dice. Also tried disabling PT Scripting API to no avail.

Any advice to resolve this?

Sounds like PT getting jammed up with a really massive clip list… does that sound right?
Clear unused?

I doubt the issue is on the matchbox side, but you could try separating the video ref into shots, then use those to send to PT. Or try an empty session to see if that makes a difference.

Select the video ref - right click - Split into shots - Create Shot Track Using Video Clips.

I’m not sure that’s it. I tried making the shot track in a fresh session as well as splitting it into shots, same issue persisted, and still does.

However: I’ve been able to discern that the hangup seems to be caused by a very aggressive zoom-in shot. I cut the first few minutes off the picture ref to get rid of it and then spotted it to the right timecode in Matchbox. After doing that everything worked smoothly even in a very large PT session.

Judging by the separated video clips I can see in Matchbox, it does seem to be accurately identifying all the shots in the entire piece, even before cutting out that zoom shot.

I’ve also deduced that MB does actually create all the cuts if I disable the Scripting API, it’s just verrrryy unfeasibly slow starting at the same cut.

whaaaaa? I can’t see how that’s possible.
The process of analysing the image and finding the cut points is completely separate to the process of sending those cut points to PT.

You’re saying that even with a bunch of clips (separated from the full length ref) MB-PT gets jammed up after a bunch of those shot definitions have been sent???

Can you possibly save a MB file with those split shots in it and I’ll see if I can reproduce the issue. Maybe there’s some screwey data in the separated shots which causes some bad behaviour. Support at blah, blah dot com.