VSE: Prefetch Cache makes Blender hang #79497
Labels
No Label
Interest
Alembic
Interest
Animation & Rigging
Interest
Asset Browser
Interest
Asset Browser Project Overview
Interest
Audio
Interest
Automated Testing
Interest
Blender Asset Bundle
Interest
BlendFile
Interest
Collada
Interest
Compatibility
Interest
Compositing
Interest
Core
Interest
Cycles
Interest
Dependency Graph
Interest
Development Management
Interest
EEVEE
Interest
EEVEE & Viewport
Interest
Freestyle
Interest
Geometry Nodes
Interest
Grease Pencil
Interest
ID Management
Interest
Images & Movies
Interest
Import Export
Interest
Line Art
Interest
Masking
Interest
Metal
Interest
Modeling
Interest
Modifiers
Interest
Motion Tracking
Interest
Nodes & Physics
Interest
OpenGL
Interest
Overlay
Interest
Overrides
Interest
Performance
Interest
Physics
Interest
Pipeline, Assets & IO
Interest
Platforms, Builds & Tests
Interest
Python API
Interest
Render & Cycles
Interest
Render Pipeline
Interest
Sculpt, Paint & Texture
Interest
Text Editor
Interest
Translations
Interest
Triaging
Interest
Undo
Interest
USD
Interest
User Interface
Interest
UV Editing
Interest
VFX & Video
Interest
Video Sequencer
Interest
Virtual Reality
Interest
Vulkan
Interest
Wayland
Interest
Workbench
Interest: X11
Legacy
Blender 2.8 Project
Legacy
Milestone 1: Basic, Local Asset Browser
Legacy
OpenGL Error
Meta
Good First Issue
Meta
Papercut
Meta
Retrospective
Meta
Security
Module
Animation & Rigging
Module
Core
Module
Development Management
Module
EEVEE & Viewport
Module
Grease Pencil
Module
Modeling
Module
Nodes & Physics
Module
Pipeline, Assets & IO
Module
Platforms, Builds & Tests
Module
Python API
Module
Render & Cycles
Module
Sculpt, Paint & Texture
Module
Triaging
Module
User Interface
Module
VFX & Video
Platform
FreeBSD
Platform
Linux
Platform
macOS
Platform
Windows
Priority
High
Priority
Low
Priority
Normal
Priority
Unbreak Now!
Status
Archived
Status
Confirmed
Status
Duplicate
Status
Needs Info from Developers
Status
Needs Information from User
Status
Needs Triage
Status
Resolved
Type
Bug
Type
Design
Type
Known Issue
Type
Patch
Type
Report
Type
To Do
No Milestone
No project
No Assignees
3 Participants
Notifications
Due Date
No due date set.
Dependencies
No dependencies set.
Reference: blender/blender#79497
Loading…
Reference in New Issue
No description provided.
Delete Branch "%!s(<nil>)"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Intel(R) UHD Graphics 600 Intel 4.5.0 - Build 26.20.100.7262
Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-08-03 05:14, hash:
144f780c71
Short description of error
Using Prefetch cache makes Blender highly unstable and then hang.
Exact steps for others to reproduce the error
[.blend and video removed, as it was not considered useful]
Added subscriber: @tintwotin
#79508 was marked as duplicate of this issue
Added subscriber: @iss
Changed status from 'Needs Triage' to: 'Needs User Info'
Does this happen when you click on File > Defaults > Load Factory Settings? Also aren't you running out of RAM? I see playhead skipping over cached areas, also the lag when turning on prefetch is quite suspicious.
Can not reproduce crash though. Can you run Blender via
blender_debug_log.cmd
file and look intoblender_debug_output.txt
file that will be created. In the end there should be crash file mentioned. Can you upload I guess all those files?Goes unresponsive until Windows suggests to shut Blender down:
[reports removed, as they were not considered useful]
I hope you noticed I've uploaded the .blend above, so you can try for yourself.
Changed status from 'Needs User Info' to: 'Needs Triage'
Changed status from 'Needs Triage' to: 'Confirmed'
I have tried to reproduce with provided .blend file.
Thanks for crash backtrace, it looks I accidentally removed previous fix for this in refactoring patch.
Now I am not sure why it is executed, but this crash is caused by running delete operator. I guess this could be caused by some addon?
This issue was referenced by
1ccb997c6d
Changed status from 'Confirmed' to: 'Resolved'
Added subscriber: @lichtwerk
This problem is not solved in the 2.91 Alpha build from last night(which includes the "delete" fix). Tested by using the same .blend above. First playing without Prefetch Cache and then with - it ends up milky-white and hanging:
[video removed, as it was not considered useful]
Can you then upload new crash file? The one you gave me crashed in delete operator
Actually, it doesn't seem to produce a crash report - as shown in the video, it hangs until the process is killed.
Debug logs:
[reports removed, as they were not considered useful]
VSE: Prefetch Cache makes Blender crashto VSE: Prefetch Cache makes Blender hangAs this bug-report is now closed and it seems to be unrelated to the delete bug, do I have to make a new report, or can this one be reopened?
Probably it would be better to make new report. But please make sure you test this without addons. This could be even issue with GPU somehow, there are some issues with intel GPUs not working optimally, so make sure you have latest drivers as well.
This is the same bug, as this user encountered here: https://youtu.be/56XaahF5QMw?t=237
It's still not fixed.
As matter of fact if I play the same file in 2.79 it plays with 24 fps, if I play the same file with Prefetch Frames ON in 2.92 it only plays 7-10 fps.
I don't see any connection between posted video and this particular report. If there is bug please create new report.