SEGFAULT when viewing Movie Clip as a Background Image in a Camera #79484

New Issue

Pavel Duong · 2020-08-03T12:01:05+02:00

Pavel Duong commented

2020-08-03 12:01:05 +02:00

System Information
Operating system: Clear Linux (Build ID: 33060); Kernel 5.5.15-930.native
Graphics card: Intel(R) HD Graphics 4000 (IVB GT2)
!!This error occurs even with blender-softwaregl.!!

Blender Version
Broken: 7cd2c1fd2e, 144f780c71
Worked: LTS 2.83.3
Caused by 97b597cd04

Short description of error

Blender crashes when a movie clip is set as background image in a camera and viewing through said camera. Setting an image as the background image still works as intended.

Exact steps for others to reproduce the error

Load a video as a background image in a camera and view through it. I've attached a video just in case I didn't express it correctly. From my tests it doesn't matter which video is used.

blender.crash.txt
blender_crash.mp4

**System Information** Operating system: Clear Linux (Build ID: 33060); Kernel 5.5.15-930.native Graphics card: Intel(R) HD Graphics 4000 (IVB GT2) ***!!This error occurs even with `blender-softwaregl.`!!*** **Blender Version** Broken: 7cd2c1fd2e7a, 144f780c71ed Worked: LTS 2.83.3 Caused by 97b597cd04 **Short description of error** Blender crashes when a movie clip is set as background image in a camera and viewing through said camera. Setting an image as the background image still works as intended. **Exact steps for others to reproduce the error** Load a video as a background image in a camera and view through it. I've attached a video just in case I didn't express it correctly. From my tests it doesn't matter which video is used. [blender.crash.txt](https://archive.blender.org/developer/F8740858/blender.crash.txt) [blender_crash.mp4](https://archive.blender.org/developer/F8740863/blender_crash.mp4)

Pavel Duong commented

2020-08-03 12:01:05 +02:00

Added subscriber: @vignette

Philipp Oeser commented

2020-08-03 12:05:18 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-08-03 12:05:18 +02:00

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

Philipp Oeser commented

2020-08-03 12:05:18 +02:00

Confirmed, checking...

Philipp Oeser commented

2020-08-03 13:31:47 +02:00

Git bisect gives 97b597cd04 as the culprit commit

gpu_get_movieclip_gputexture returns NULL in BKE_movieclip_get_gpu_texture

1  BKE_movieclip_get_gpu_texture       movieclip.c      1905 0x3331d4b 
2  image_camera_background_texture_get overlay_image.c  206  0x3ac5791 
3  OVERLAY_image_camera_cache_populate overlay_image.c  336  0x3ac5e5f 
4  OVERLAY_camera_cache_populate       overlay_extra.c  1262 0x3ac1a4a 
5  OVERLAY_cache_populate              overlay_engine.c 387  0x3abb4d0 
6  drw_engines_cache_populate          draw_manager.c   1015 0x3a694a5 
7  DRW_draw_render_loop_ex             draw_manager.c   1489 0x3a6a907 
8  DRW_draw_view                       draw_manager.c   1404 0x3a6a4f9 
9  view3d_draw_view                    view3d_draw.c    1595 0x45900ba 
10 view3d_main_region_draw             view3d_draw.c    1617 0x4590161 
11 ED_region_do_draw                   area.c           538  0x3ebae66 
12 wm_draw_window_offscreen            wm_draw.c        697  0x36e077f 
13 wm_draw_window                      wm_draw.c        823  0x36e0d05 
14 wm_draw_update                      wm_draw.c        1027 0x36e1344 
15 WM_main                             wm.c             481  0x36dde54 
16 main                                creator.c        546  0x3285c63

Git bisect gives 97b597cd04 as the culprit commit `gpu_get_movieclip_gputexture` returns NULL in `BKE_movieclip_get_gpu_texture` ``` 1 BKE_movieclip_get_gpu_texture movieclip.c 1905 0x3331d4b 2 image_camera_background_texture_get overlay_image.c 206 0x3ac5791 3 OVERLAY_image_camera_cache_populate overlay_image.c 336 0x3ac5e5f 4 OVERLAY_camera_cache_populate overlay_extra.c 1262 0x3ac1a4a 5 OVERLAY_cache_populate overlay_engine.c 387 0x3abb4d0 6 drw_engines_cache_populate draw_manager.c 1015 0x3a694a5 7 DRW_draw_render_loop_ex draw_manager.c 1489 0x3a6a907 8 DRW_draw_view draw_manager.c 1404 0x3a6a4f9 9 view3d_draw_view view3d_draw.c 1595 0x45900ba 10 view3d_main_region_draw view3d_draw.c 1617 0x4590161 11 ED_region_do_draw area.c 538 0x3ebae66 12 wm_draw_window_offscreen wm_draw.c 697 0x36e077f 13 wm_draw_window wm_draw.c 823 0x36e0d05 14 wm_draw_update wm_draw.c 1027 0x36e1344 15 WM_main wm.c 481 0x36dde54 16 main creator.c 546 0x3285c63 ```

Philipp Oeser commented

2020-08-03 13:39:47 +02:00

Added subscriber: @fclem