Blender crash when moving playhead in VSE #88237

New Issue

Matias Mendiola · 2021-05-12T19:39:40+02:00

Matias Mendiola commented

2021-05-12 19:39:40 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.89

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab
Worked: (newest version of Blender that worked as expected)

Short description of error
Blender crash when moving playhead in VSE over an scene strip

Exact steps for others to reproduce the error
Open the provided file and move the playhead over the first strip in the VSE. Blender crash

VSE_crash.zip

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.89 **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab` Worked: (newest version of Blender that worked as expected) **Short description of error** Blender crash when moving playhead in VSE over an scene strip **Exact steps for others to reproduce the error** Open the provided file and move the playhead over the first strip in the VSE. Blender crash [VSE_crash.zip](https://archive.blender.org/developer/F10088493/VSE_crash.zip)

Matias Mendiola commented

2021-05-12 19:39:40 +02:00

Added subscriber: @mendio

Antonio Vazquez commented

2021-05-12 19:41:50 +02:00

Added subscriber: @antoniov

Antonio Vazquez commented

2021-05-12 19:41:50 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Antonio Vazquez commented

2021-05-12 19:41:50 +02:00

Confirmed in Windows 10. The crash looks related to Sound (AUD).

Here is the crash report.

VSE_crash.crash.txt

I have tested in 2.93 and 3.0. It looks the error is when you move the playhead and release the mouse button.

Also noticed that running the example in Debug mode, I get an Assert in BLI_assert(id->session_uuid != MAIN_ID_SESSION_UUID_UNSET);

Confirmed in Windows 10. The crash looks related to Sound (AUD). Here is the crash report. [VSE_crash.crash.txt](https://archive.blender.org/developer/F10088506/VSE_crash.crash.txt) I have tested in 2.93 and 3.0. It looks the error is when you move the playhead and release the mouse button. Also noticed that running the example in Debug mode, I get an Assert in `BLI_assert(id->session_uuid != MAIN_ID_SESSION_UUID_UNSET);`

Richard Antalik commented

2021-05-12 20:13:00 +02:00

Added subscriber: @iss

Richard Antalik commented

2021-05-12 20:13:00 +02:00

Can confirm this file crashing at least from 2.90. This seems to be some deeper issue in dependency graph.

Nelly Sanchez commented

2021-05-13 05:18:27 +02:00

Added subscriber: @nellysanchez594

Nelly Sanchez commented

2021-05-13 05:18:33 +02:00

Removed subscriber: @nellysanchez594

Richard Antalik commented

2021-05-13 18:40:01 +02:00

This is caused by prefetch, that doesn't see scene strip because of effect and tries to render scene strip, which fails.
I think this is because prefetch uses dependency graph for rendering with own evaluated scene and render job can't build it's own dependency graph from this data.

I can fix this case quickly, but inability of prefetch to render scene strips is not only inconvinient, but seems also quite high maintenance so it may be worth fixing this aspect.

@mendio If this issue is preventing work to be done, you can disable prefetching in sequencer. If you want to use prefetch, you can use patch D11247.

This is caused by prefetch, that doesn't see scene strip because of effect and tries to render scene strip, which fails. I think this is because prefetch uses dependency graph for rendering with own evaluated scene and render job can't build it's own dependency graph from this data. I can fix this case quickly, but inability of prefetch to render scene strips is not only inconvinient, but seems also quite high maintenance so it may be worth fixing this aspect. @mendio If this issue is preventing work to be done, you can disable prefetching in sequencer. If you want to use prefetch, you can use patch [D11247](https://archive.blender.org/developer/D11247).

Matias Mendiola commented

2021-05-13 19:11:58 +02:00

Thanks @iss . For the record, I found yesterday a workaround that solve the problem making a full copy of the edit scene, you can try that with the sample file.
This way everything start working again without crashes, Maybe this could help to found the issue.

Thanks @iss . For the record, I found yesterday a workaround that solve the problem making a full copy of the edit scene, you can try that with the sample file. This way everything start working again without crashes, Maybe this could help to found the issue.

Kevin Kelly commented

2021-07-02 01:15:15 +02:00

Added subscriber: @kevinkelly

Kevin Kelly commented

2021-07-02 01:22:01 +02:00

This comment was removed by @kevinkelly

*This comment was removed by @kevinkelly*

blender-admin commented

2021-08-24 00:58:01 +02:00

This issue was referenced by a57ba4147f

This issue was referenced by a57ba4147f1344e9379a271fc752036969574a2d

Richard Antalik commented

2021-08-24 01:00:04 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Richard Antalik closed this issue

2021-08-24 01:00:04 +02:00

Richard Antalik self-assigned this 2021-08-24 01:00:04 +02:00

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Blender crash when moving playhead in VSE #88237