Render animation and timers #90657
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Reference: blender/blender#90657
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System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.09
Blender Version
Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash:
1b8d33b18c
Short description of error
The problem is that when animation is rendered timer functions can't finish their job if it takes too long time.
In an example I created a timer function which counts from 0 to 4 when it has a job and a frame change handler which points to the timer function that it has a job whenever the frame is changed.
It works as expected if frame number is changed via Blender UI but it does not during render animation. Frames are changed faster than the function can finish its work.
Exact steps for others to reproduce the error
untitled.blend
Added subscriber: @randum
Added subscriber: @StephenSwaney
Random guessing says this is a threading issue - timer and render running in separate threads. If True: you want some sort of locking mechanism to make one wait for the other.
Yes but I thought that by default whenever Python get execution Blender waits until it to be finished.
https://docs.blender.org/api/current/info_gotcha.html#can-i-redraw-during-script-execution
Added subscriber: @lichtwerk
Changed status from 'Needs Triage' to: 'Confirmed'
Can confirm the behavior in
741fa8180c
.Added subscriber: @brecht
Changed status from 'Confirmed' to: 'Archived'
The Blender main thread is locked until the script finishes executing, the render thread is not and should not be.