VSE Render crash when zooming timeline #53686

New Issue

ChristopherAnderssarian · 2018-01-03T17:14:41+01:00

2018-01-03 17:14:41 +01:00

System Information
Windows 7 Ultimate, 64-bit, 32GB, 5960x, Nvidia Quadro FX 1800 (Primary) & GeForce 9800 GTX+ (Secondary)
Graphics Tablet: Wacom Bamboo Model: CTF-430 Driver Version 5.2.4-5

Blender Version
Official release(s) unless specified:
Broken: 2.79 (Windows 64-Bit & Ubuntu Linux (ubuntu-17.10-desktop-amd64) w/ Virtual Box Version 5.2.4 r119785 (Qt5.6.2)), 2.79.0-e59cf13 (Windows 64-Bit)

Worked: (N/A)

Short description of error

When rendering in the Video Sequence Editor Blender crashes if you zoom on the timeline.

Exact steps for others to reproduce the error

Rendering_Crash_VSE.blend

Windows: https://www.youtube.com/watch?v=2cDWGxDbmWo

Ubuntu Linux: https://www.youtube.com/watch?v=pdbQZ3_cxxM

**System Information** Windows 7 Ultimate, 64-bit, 32GB, 5960x, Nvidia Quadro FX 1800 (Primary) & GeForce 9800 GTX+ (Secondary) Graphics Tablet: Wacom Bamboo Model: CTF-430 Driver Version 5.2.4-5 **Blender Version** Official release(s) unless specified: Broken: 2.79 (Windows 64-Bit & Ubuntu Linux (ubuntu-17.10-desktop-amd64) w/ Virtual Box Version 5.2.4 r119785 (Qt5.6.2)), 2.79.0-e59cf13 (Windows 64-Bit) Worked: (N/A) **Short description of error** When rendering in the Video Sequence Editor Blender crashes if you zoom on the timeline. ![vlcsnap-9321-01-10-00h41m46s661.png](https://archive.blender.org/developer/F1678744/vlcsnap-9321-01-10-00h41m46s661.png) **Exact steps for others to reproduce the error** [Rendering_Crash_VSE.blend](https://archive.blender.org/developer/F1678977/Rendering_Crash_VSE.blend) Windows: https://www.youtube.com/watch?v=2cDWGxDbmWo Ubuntu Linux: https://www.youtube.com/watch?v=pdbQZ3_cxxM

ChristopherAnderssarian commented

2018-01-03 17:14:41 +01:00

Added subscriber: @ChristopherAnderssarian

ChristopherAnderssarian changed title from ~~VSE Render crash when Zooming timeline~~ to VSE Render crash when zooming timeline

2018-01-03 17:15:23 +01:00

Philipp Oeser commented

2018-01-03 18:32:14 +01:00

Added subscriber: @lichtwerk

Philipp Oeser self-assigned this 2018-01-03 18:32:14 +01:00

Philipp Oeser commented

2018-01-03 18:32:14 +01:00

Can confirm this (apparently only happening with mousewheel zoom), will look into it shortly...

Philipp Oeser commented

2018-01-03 22:24:08 +01:00

... and apparently only happening with a Text Strip rendering (no Sequencer preview window has to be open for this even), crash happening in font handling

1   BLI_addhead                  listbase.c        77   0x2deda1e      
2   blf_glyph_add                blf_glyph.c       313  0x337b632      
3   blf_font_ensure_ascii_table  blf_font.c        125  0x3377c20      
4   blf_font_wrap_apply          blf_font.c        669  0x3379866      
5   blf_font_boundbox__wrap      blf_font.c        767  0x3379d48      
6   BLF_boundbox_ex              blf.c             669  0x3376ab0      
7   do_text_effect               seqeffects.c      3519 0x2af6d53      
8   seq_render_effect_strip_impl sequencer.c       2769 0x2b029dd      
9   do_render_strip_uncached     sequencer.c       3533 0x2b05036      
10  seq_render_strip             sequencer.c       3614 0x2b053ed      
11  seq_render_strip_stack       sequencer.c       3766 0x2b059d1      
12  BKE_sequencer_give_ibuf      sequencer.c       3883 0x2b05f52      
13  do_render_seq                pipeline.c        2740 0x22cd480      
14  do_render_all_options        pipeline.c        2830 0x22cd978      
15  RE_BlenderAnim               pipeline.c        3762 0x22d08b9      
16  render_startjob              render_internal.c 604  0x21b0a9d      
17  do_job_thread                wm_jobs.c         337  0x1c43c44      
18  tslot_thread_start           threads.c         253  0x2e41f25      
19  start_thread                                        0x7ffff095a609 
20  clone                                               0x7ffff0483e6f 
... <More>

... and apparently only happening with a **Text** Strip rendering (no Sequencer preview window has to be open for this even), crash happening in font handling ``` 1 BLI_addhead listbase.c 77 0x2deda1e 2 blf_glyph_add blf_glyph.c 313 0x337b632 3 blf_font_ensure_ascii_table blf_font.c 125 0x3377c20 4 blf_font_wrap_apply blf_font.c 669 0x3379866 5 blf_font_boundbox__wrap blf_font.c 767 0x3379d48 6 BLF_boundbox_ex blf.c 669 0x3376ab0 7 do_text_effect seqeffects.c 3519 0x2af6d53 8 seq_render_effect_strip_impl sequencer.c 2769 0x2b029dd 9 do_render_strip_uncached sequencer.c 3533 0x2b05036 10 seq_render_strip sequencer.c 3614 0x2b053ed 11 seq_render_strip_stack sequencer.c 3766 0x2b059d1 12 BKE_sequencer_give_ibuf sequencer.c 3883 0x2b05f52 13 do_render_seq pipeline.c 2740 0x22cd480 14 do_render_all_options pipeline.c 2830 0x22cd978 15 RE_BlenderAnim pipeline.c 3762 0x22d08b9 16 render_startjob render_internal.c 604 0x21b0a9d 17 do_job_thread wm_jobs.c 337 0x1c43c44 18 tslot_thread_start threads.c 253 0x2e41f25 19 start_thread 0x7ffff095a609 20 clone 0x7ffff0483e6f ... <More> ```

Philipp Oeser removed their assignment 2018-01-23 21:38:04 +01:00

Philipp Oeser commented

2018-01-23 21:38:04 +01:00

hm, seems like font->glyph_cache is cleared by UI_view2d_zoom_cache_reset() somewhere inbetween setting it up in do_text_effect BLF_size and actually needing it later in blf_glyph_add
Not sure if there is a good way to lock here? Or just recreate it on the fly [in the case it was cleared]?

hm, seems like `font->glyph_cache` is cleared by `UI_view2d_zoom_cache_reset()` somewhere inbetween setting it up in `do_text_effect` `BLF_size` and actually needing it later in `blf_glyph_add` Not sure if there is a good way to lock here? Or just recreate it on the fly [in the case it was cleared]?

Sergey Sharybin was assigned by Philipp Oeser

2018-01-24 16:22:11 +01:00

Philipp Oeser commented

2018-01-24 16:22:11 +01:00

Added subscribers: @Sergey, @brecht