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Maniphest T90407

VSE: Strip attached to transition effect, when cut outside transition, creates a mess of strips
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Description

System Information
Operating system: Linux-5.4.0-80-generic-x86_64-with-glibc2.31 64 Bits
Graphics card: GeForce 9800 GT/PCIe/SSE2 NVIDIA Corporation 3.3.0 NVIDIA 340.108

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-08-02 19:45, hash: rBefd7c95bb27c
Caused by rBd373b43f07f5: VSE: Better handling of effect strip splitting.

Short description of error
A strip that is part of a transition effect, when cut outside the transition, will result in a mess of basically all strips involved, with strange duplications and stretches.

Exact steps for others to reproduce the error

bug__transition-cut.blend605 KBDownload

Revisions and Commits

rB Blender
D12121rB709ce44617bf Fix T90407: Split fails on transition strips

Related Objects

Event Timeline

David Salvo (slinkeepie) created this task.Aug 3 2021, 2:29 PM
David Salvo (slinkeepie) added a project: Video Sequencer.
Philipp Oeser (lichtwerk) changed the task status from Needs Triage to Confirmed.Aug 3 2021, 2:57 PM
Philipp Oeser (lichtwerk) claimed this task.
Philipp Oeser (lichtwerk) added a project: VFX & Video.
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).

Can confirm, will check.

Philipp Oeser (lichtwerk) triaged this task as High priority.Aug 3 2021, 3:58 PM
Philipp Oeser (lichtwerk) added a subscriber: Richard Antalik (ISS).

Caused by rBd373b43f07f5: VSE: Better handling of effect strip splitting.
@Richard Antalik (ISS): mind checking?

Philipp Oeser (lichtwerk) removed Philipp Oeser (lichtwerk) as the assignee of this task.Aug 3 2021, 3:58 PM
Philipp Oeser (lichtwerk) updated the task description. (Show Details)
Richard Antalik (ISS) added a revision: D12121: Fix T90407: Split fails on transition strips.Aug 3 2021, 10:26 PM
Richard Antalik (ISS) added a comment.Aug 3 2021, 10:32 PM

Technically this never worked properly, but arguably rBd373b43f07f5 made it a bit worse. Got some initial fix ready, will continue tomorrow to cover more edge cases.

David Salvo (slinkeepie) added a comment.Aug 4 2021, 1:39 AM
In T90407#1201288, @Richard Antalik (ISS) wrote:

Technically this never worked properly, but arguably rBd373b43f07f5 made it a bit worse. Got some initial fix ready, will continue tomorrow to cover more edge cases.

Thanks so much (everyone) for the quick responses to all bug reports! I've returned to editing as a creative outlet after years away, and am relearning the blender VSE. First thing I did was fully customize my hotkeys which I never did last time (typical vim user now ha!), and in this process of trying to perfect my workflow, I have fiddled with almost every VSE function while working on a family project. I'm very sensitive to things that don't work properly, so will be reporting anything I find, as I find it.

Again, really appreciate the responsive developers here. I've donated monthly to Blender for years as a VSE user as I love the power and the interface, and love seeing its primary 3D purpose excel as well... but having lots of small bugs definitely lowers user confidence in the experience, so I'm happy to do my part to report them!

I think there are some anomalies with other strip cuts. I see rBd373b43f07f5 that you mentioned, though it's meta strips in particular I've always found so unreliable that I stopped using them - and it seems this may still be the case. I will try to isolate some cases of this eventually, as it doesn't seem there's many reports out there.

Good luck with completing this fix, hopefully it will fix a few other cases as well!

Peter Fog (tintwotin) added a subscriber: Peter Fog (tintwotin).Aug 4 2021, 8:29 AM

@Richard Antalik (ISS) Additional unused transition improvements: D10207

David Salvo (slinkeepie) added a comment.Aug 4 2021, 10:14 AM
In T90407#1201425, @Peter Fog (tintwotin) wrote:

@Richard Antalik (ISS) Additional unused transition improvements: D10207

Some great ideas here Peter, it's a shame it was abandoned. Hopefully all the small annoying issues can be chipped away until few remain. Fancy effects in editing are rarely useful, but stable core basics are. Also any potential improvements to promote quick/intelligent workflow seems to be low-hanging fruit that should always be considered.

Richard Antalik (ISS) closed this task as Resolved by committing rB709ce44617bf: Fix T90407: Split fails on transition strips.Aug 24 2021, 12:58 AM
Richard Antalik (ISS) claimed this task.
Richard Antalik (ISS) added a commit: rB709ce44617bf: Fix T90407: Split fails on transition strips.