vse group strips expanding in length on cancelled movement #101098
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opened 2022-09-15 18:48:40 +02:00 by paperbenni
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Reference: blender/blender#101098
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System Information
Operating system: Linux-5.19.8-arch1-1-x86_64-with-glibc2.36 64 Bits
Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 515.65.01
Blender Version
Broken: version: 3.3.1 Release Candidate, branch: master, commit date: 2022-09-12 18:27, hash:
19ae71c113
broken in 3.4.0 as well
Short description of error
Peek 2022-09-15 18-42.mp4
Cancelling movement on a group strip in the VSE makes it expand in length. This does not happen every time but in a solid 40% of cases, with bigger movements increasing the likelihood.
Exact steps for others to reproduce the error
Added subscriber: @paperbenni
Added subscriber: @iss
Changed status from 'Needs Triage' to: 'Needs User Info'
Can't reproduce the issue here. Can you upload .blend file?
Changed status from 'Needs User Info' to: 'Confirmed'
Sorry, I was testing in 2.93.. Can reproduce in 3.4.
This is caused by clamping handle translation to strip bounds, but the issue is, that if both handles are moved and step is bigger than strip length, it will fail.
Since function
SEQ_time_update_meta_strip_range()
is still needed, it would be possible to inline part ofSEQ_time_*_handle_frame_set()
without clamping. problem is, that this will happen at every place where both handles are moved at the same time, so inSEQ_transform_translate_sequence()
as well. Flag to skip clamping could be implemented, but I don't quite like such flags. Also would violate my principle, that API functions should not result in invalid state.So solution could be to have function that translates one or both handles. This way it would be possible to skip clamping if both handles are moved. Also it would clean up code where
handle_set(seq, handle_get(seq) + x)
is used as such code is not best to read.As bugfix, I will implement
SEQ_time_translate_handles()
for both handles at once, this can be backported to LTS, and then will look at code if I see only one handle being moved, so I can add enum forSEQ_time_translate_handles()
to select which handle.This issue was referenced by
41527ea89c
This issue was referenced by
d4a763d363
Changed status from 'Confirmed' to: 'Resolved'