Frequent freezes/crashes in the Video Sequencer #74662

New Issue

Sol Bekic · 2020-03-11T20:27:06+01:00

Sol Bekic commented

2020-03-11 20:27:06 +01:00

System Information
Operating system: Arch Linux (kernel 5.5.8-arch1-1)
Graphics card: NVIDIA GeForce GTX 1070

system-info.txt is attached: system-info.txt

Blender Version
Installed from ArchLinux repository

pkg version 17:2.82-2
version 2.82 (sub 7)
commit date 2020-02-13, hash 5b416ffb848e
build date 2020-02-28

When editing videos in the sequencer, I experience frequent freezes. The whole UI becomes unresponsive and does no longer process X-Server damage events. There is no output in the console. Using gdb I can see that the process is still going, and when I interrupt it I am always somewhere in this stack trace:

- 0  0x00005555565ca3b1 in seq_cache_hashhash ()
- 1  0x00005555586300ab in BLI_ghash_remove ()
- 2  0x00005555565ca4eb in seq_cache_recycle_linked ()
- 3  0x00005555565ca8b6 in BKE_sequencer_cache_recycle_item ()
- 4  0x00005555565cb3bd in BKE_sequencer_cache_put_if_possible ()
- 5  0x0000555556506cfc in BKE_sequencer_give_ibuf ()
- 6  0x0000555556c4fc13 in sequencer_ibuf_get ()
- 7  0x0000555556c4fe12 in sequencer_draw_preview ()
- 8  0x0000555556c5e101 in sequencer_preview_region_draw ()
- 9  0x0000555556915351 in ED_region_do_draw ()
- 10 0x00005555565ea5af in wm_draw_update ()
- 11 0x00005555565e84f4 in WM_main ()
#12 0x00005555563fa984 in main ()

The precise stack trace varies of course, but with ~10 tests I always end up with the same up to depth #1 pictured here. Above that it seems like there is a (near) infinite loop around seq_cache_hashcmp, seq_cache_hashhash' and ghash_remove_ex`.

Reproduction: I am not sure how to reproduce this from scratch, it happens to me reliably in intervals of around 5-20 minutes when editing. Given the stack trace, it seems related to my preview settings. I am unsure how to share them in detail, so I will attach my .blend file and do a short summary. Please let me know which further information I can provide to help diagnose this issue.

Preview - View Settings
- Proxy Render Size: 25%
- Prefetch Frames: yes
Sequencer - View - Cache
- Show Cache: yes
- Final Images: yes
- Raw Images: no
- Preprocessed Images: yes
- Composite Images: no
- (I have varied some of these settings but noticed no difference)
Strips - Proxy & Cache
- Cache Settings
  - all caches enabled
  - recycle up to cost: 10
- Proxy Settings
  - Storage: project
  - Directory: //proxies/
- Strip Proxy & Timecode
  - 25%
  - set using 'Set Selected Strip Proxies'
  - built once at the beginning of the project

deadbug.blend

**System Information** Operating system: Arch Linux (kernel 5.5.8-arch1-1) Graphics card: NVIDIA GeForce GTX 1070 system-info.txt is attached: [system-info.txt](https://archive.blender.org/developer/F8401092/system-info.txt) **Blender Version** Installed from ArchLinux repository - pkg version `17:2.82-2` - version `2.82 (sub 7)` - commit date `2020-02-13`, hash `5b416ffb848e` - build date `2020-02-28` When editing videos in the sequencer, I experience frequent freezes. The whole UI becomes unresponsive and does no longer process X-Server damage events. There is no output in the console. Using `gdb` I can see that the process is still going, and when I interrupt it I am always somewhere in this stack trace: ``` - 0 0x00005555565ca3b1 in seq_cache_hashhash () - 1 0x00005555586300ab in BLI_ghash_remove () - 2 0x00005555565ca4eb in seq_cache_recycle_linked () - 3 0x00005555565ca8b6 in BKE_sequencer_cache_recycle_item () - 4 0x00005555565cb3bd in BKE_sequencer_cache_put_if_possible () - 5 0x0000555556506cfc in BKE_sequencer_give_ibuf () - 6 0x0000555556c4fc13 in sequencer_ibuf_get () - 7 0x0000555556c4fe12 in sequencer_draw_preview () - 8 0x0000555556c5e101 in sequencer_preview_region_draw () - 9 0x0000555556915351 in ED_region_do_draw () - 10 0x00005555565ea5af in wm_draw_update () - 11 0x00005555565e84f4 in WM_main () #12 0x00005555563fa984 in main () ``` The precise stack trace varies of course, but with ~10 tests I always end up with the same up to depth #1 pictured here. Above that it seems like there is a (near) infinite loop around `seq_cache_hashcmp`, `seq_cache_hashhash' and `ghash_remove_ex`. Reproduction: I am not sure how to reproduce this from scratch, it happens to me reliably in intervals of around 5-20 minutes when editing. Given the stack trace, it seems related to my preview settings. I am unsure how to share them in detail, so I will attach my .blend file and do a short summary. Please let me know which further information I can provide to help diagnose this issue. - Preview - View Settings - Proxy Render Size: 25% - Prefetch Frames: yes - Sequencer - View - Cache - Show Cache: yes - Final Images: yes - Raw Images: no - Preprocessed Images: yes - Composite Images: no - (I have varied some of these settings but noticed no difference) - Strips - Proxy & Cache - Cache Settings - all caches enabled - recycle up to cost: 10 - Proxy Settings - Storage: project - Directory: `//proxies/` - Strip Proxy & Timecode - 25% - set using 'Set Selected Strip Proxies' - built once at the beginning of the project [deadbug.blend](https://archive.blender.org/developer/F8401098/deadbug.blend)

Sol Bekic commented

2020-03-11 20:27:06 +01:00

Added subscriber: @s-ol

Richard Antalik commented

2020-03-12 16:50:22 +01:00

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

Richard Antalik commented

2020-03-12 16:51:36 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-03-12 16:51:36 +01:00

This will have probably same roots as #74603, will have to investigate

user1 commented

2020-03-18 10:13:10 +01:00

Added subscriber: @user1

user1 commented

2020-03-18 10:13:10 +01:00

I experienced the same behavior yesterday when i tried to track footage (VFX). I think my PC tried to tell me about a memory leakage. Whithin minutes the PC response turned from ok to total system freeze in an exponentially curved manner.

user1 commented

2020-03-18 11:35:35 +01:00

Two minutes after i launch this file i can brute force interrupt my freezed PC:
tracktest.blend

and since i got an error message while packing my footage for you, here the footage:
Rec-2020-03-17_17.12.02.mp4

System Information
Operating system: Linux-5.3.0-42-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GT 630/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116

Blender Version
Broken: version: 2.83 (sub 9), branch: master, commit date: 2020-03-16 17:25, hash: 120a38ccbe

Two minutes after i launch this file i can brute force interrupt my freezed PC: [tracktest.blend](https://archive.blender.org/developer/F8413635/tracktest.blend) ![Bildschirmfoto zu 2020-03-18 11-24-18.png](https://archive.blender.org/developer/F8413640/Bildschirmfoto_zu_2020-03-18_11-24-18.png) and since i got an error message while packing my footage for you, here the footage: [Rec-2020-03-17_17.12.02.mp4](https://archive.blender.org/developer/F8413645/Rec-2020-03-17_17.12.02.mp4) ![Donalds rocket drawing.png](https://archive.blender.org/developer/F8413649/Donalds_rocket_drawing.png) **System Information** Operating system: Linux-5.3.0-42-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GT 630/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116 **Blender Version** Broken: version: 2.83 (sub 9), branch: master, commit date: 2020-03-16 17:25, hash: `120a38ccbe`

Richard Antalik commented

2020-03-23 21:07:13 +01:00

In #74662#893320, @user1 wrote:
Two minutes after i launch this file i can brute force interrupt my freezed PC:

Porbably best demo file, but this has nothing to do with original report, and you should make new one

> In #74662#893320, @user1 wrote: > Two minutes after i launch this file i can brute force interrupt my freezed PC: Porbably best demo file, but this has nothing to do with original report, and you should make new one

blender-admin commented

2020-03-25 00:23:06 +01:00

This issue was referenced by 188ccfb0dd

This issue was referenced by 188ccfb0dd6739fb6af8741aeecbc1da82c068ab

Richard Antalik commented

2020-03-25 00:26:34 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Richard Antalik closed this issue

2020-03-25 00:26:34 +01:00

Richard Antalik self-assigned this 2020-03-25 00:26:34 +01:00

Richard Antalik commented

2020-03-25 00:32:18 +01:00

@s-ol I committed fix, please check daily build in friday, I have missed today's build.

I am not 100% sure this will fix your issue so please let me know if you still have problems

@s-ol I committed fix, please check daily build in friday, I have missed today's build. I am not 100% sure this will fix your issue so please let me know if you still have problems

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Frequent freezes/crashes in the Video Sequencer #74662