Segfault adjusting Cycles motion blur via Python #33114

New Issue

Jason van Gumster · 2012-11-07T16:26:08+01:00

Jason van Gumster commented

2012-11-07 16:26:08 +01:00

%%%Motion blur (the setting or its shutter speed) are not yet animatable via the UI. As a workaround I attempted to use a short Python script to adjust motion blur on frame change (Python script attached... just reducing the motion blur shutter from 0.5 to 0.0 from frames 60 to 75).

The script works fine when scrubbing time and playing back the animation. However, as of r51941, the moment you attempt to render, Blender crashes (using both CPU and GPU rendering options). The following is a gdb backtrace of the crash:

(gdb) bt

0 0x00007ffff236eba9 in glDeleteObjectARB () from /usr/lib/libGL.so.1
1 0x0000000001dd4c42 in GPU_shader_free (shader=0x59b9388)

  at source/blender/gpu/intern/gpu_extensions.c:1204

2 0x0000000001dd8240 in GPU_pass_free (pass=0x8a395c8)

  at source/blender/gpu/intern/gpu_codegen.c:1376

3 0x0000000001dcb2a8 in GPU_material_free (ma=0x6d01ba8)

  at source/blender/gpu/intern/gpu_material.c:240

4 0x000000000199d722 in scene_changed (bmain=0x726f6d8, UNUSED_scene=

0x6ce06b8) at source/blender/editors/render/render_update.c:376

5 0x000000000199d80a in ED_render_id_flush_update (bmain=0x726f6d8, id=

0x6ce06b8) at source/blender/editors/render/render_update.c:398

6 0x0000000001f7ed6c in dag_editors_id_update (bmain=0x726f6d8, id=0x6ce06b8)

  at source/blender/blenkernel/intern/depsgraph.c:1764

7 0x0000000001f813a7 in dag_id_flush_update (sce=0x6ce06b8, id=0x6ce06b8)

  at source/blender/blenkernel/intern/depsgraph.c:2726

8 0x0000000001f81497 in DAG_ids_flush_tagged (bmain=0x726f6d8)

  at source/blender/blenkernel/intern/depsgraph.c:2754

9 0x0000000001fa8e5a in BKE_scene_update_for_newframe (bmain=0x726f6d8, sce=

0x6ce06b8, lay=1027) at source/blender/blenkernel/intern/scene.c:1099

10 0x0000000001d4d16c in RE_engine_render (re=0x8971528, do_all=0)

  at source/blender/render/intern/source/external_engine.c:365

11 0x0000000001d8c42f in do_render_3d (re=0x8971528)

  at source/blender/render/intern/source/pipeline.c:925

12 0x0000000001d8d2ec in do_render_fields_blur_3d (re=0x8971528)

  at source/blender/render/intern/source/pipeline.c:1223

13 0x0000000001d8e477 in do_render_composite_fields_blur_3d (re=0x8971528)

  at source/blender/render/intern/source/pipeline.c:1570

14 0x0000000001d8edf0 in do_render_all_options (re=0x8971528)

  at source/blender/render/intern/source/pipeline.c:1770

15 0x0000000001d9072e in RE_BlenderAnim (re=0x8971528, bmain=0x726f6d8, scene=

0x6ce06b8, camera_override=0x0, lay=1027, sfra=58, efra=90, tfra=1)

  at source/blender/render/intern/source/pipeline.c:2301

16 0x0000000001999a7b in render_startjob (rjv=0xa85a688, stop=0x89b31dc,

  do_update=0x89b31da, progress=0x89b31e0)
  at source/blender/editors/render/render_internal.c:392

17 0x00000000017a1300 in do_job_thread (job_v=0x89b3168)

  at source/blender/windowmanager/intern/wm_jobs.c:266

18 0x00000000024a6e3f in tslot_thread_start (tslot_p=0x72daa18)

  at source/blender/blenlib/intern/threads.c:218

19 0x00007ffff00a2e0f in start_thread () from /usr/lib/libpthread.so.0
20 0x00007fffef7dd45d in clone () from /usr/lib/libc.so.6%%%

%%%Motion blur (the setting or its shutter speed) are not yet animatable via the UI. As a workaround I attempted to use a short Python script to adjust motion blur on frame change (Python script attached... just reducing the motion blur shutter from 0.5 to 0.0 from frames 60 to 75). The script works fine when scrubbing time and playing back the animation. However, as of r51941, the moment you attempt to render, Blender crashes (using both CPU and GPU rendering options). The following is a gdb backtrace of the crash: (gdb) bt - 0 0x00007ffff236eba9 in glDeleteObjectARB () from /usr/lib/libGL.so.1 - 1 0x0000000001dd4c42 in GPU_shader_free (shader=0x59b9388) ``` at source/blender/gpu/intern/gpu_extensions.c:1204 ``` # 2 0x0000000001dd8240 in GPU_pass_free (pass=0x8a395c8) ``` at source/blender/gpu/intern/gpu_codegen.c:1376 ``` # 3 0x0000000001dcb2a8 in GPU_material_free (ma=0x6d01ba8) ``` at source/blender/gpu/intern/gpu_material.c:240 ``` # 4 0x000000000199d722 in scene_changed (bmain=0x726f6d8, UNUSED_scene= 0x6ce06b8) at source/blender/editors/render/render_update.c:376 # 5 0x000000000199d80a in ED_render_id_flush_update (bmain=0x726f6d8, id= 0x6ce06b8) at source/blender/editors/render/render_update.c:398 # 6 0x0000000001f7ed6c in dag_editors_id_update (bmain=0x726f6d8, id=0x6ce06b8) ``` at source/blender/blenkernel/intern/depsgraph.c:1764 ``` # 7 0x0000000001f813a7 in dag_id_flush_update (sce=0x6ce06b8, id=0x6ce06b8) ``` at source/blender/blenkernel/intern/depsgraph.c:2726 ``` # 8 0x0000000001f81497 in DAG_ids_flush_tagged (bmain=0x726f6d8) ``` at source/blender/blenkernel/intern/depsgraph.c:2754 ``` # 9 0x0000000001fa8e5a in BKE_scene_update_for_newframe (bmain=0x726f6d8, sce= 0x6ce06b8, lay=1027) at source/blender/blenkernel/intern/scene.c:1099 # 10 0x0000000001d4d16c in RE_engine_render (re=0x8971528, do_all=0) ``` at source/blender/render/intern/source/external_engine.c:365 ``` # 11 0x0000000001d8c42f in do_render_3d (re=0x8971528) ``` at source/blender/render/intern/source/pipeline.c:925 ``` # 12 0x0000000001d8d2ec in do_render_fields_blur_3d (re=0x8971528) ``` at source/blender/render/intern/source/pipeline.c:1223 ``` # 13 0x0000000001d8e477 in do_render_composite_fields_blur_3d (re=0x8971528) ``` at source/blender/render/intern/source/pipeline.c:1570 ``` # 14 0x0000000001d8edf0 in do_render_all_options (re=0x8971528) ``` at source/blender/render/intern/source/pipeline.c:1770 ``` # 15 0x0000000001d9072e in RE_BlenderAnim (re=0x8971528, bmain=0x726f6d8, scene= 0x6ce06b8, camera_override=0x0, lay=1027, sfra=58, efra=90, tfra=1) ``` at source/blender/render/intern/source/pipeline.c:2301 ``` # 16 0x0000000001999a7b in render_startjob (rjv=0xa85a688, stop=0x89b31dc, ``` do_update=0x89b31da, progress=0x89b31e0) at source/blender/editors/render/render_internal.c:392 ``` # 17 0x00000000017a1300 in do_job_thread (job_v=0x89b3168) ``` at source/blender/windowmanager/intern/wm_jobs.c:266 ``` # 18 0x00000000024a6e3f in tslot_thread_start (tslot_p=0x72daa18) ``` at source/blender/blenlib/intern/threads.c:218 ``` - 19 0x00007ffff00a2e0f in start_thread () from /usr/lib/libpthread.so.0 - 20 0x00007fffef7dd45d in clone () from /usr/lib/libc.so.6%%%

Jason van Gumster commented

2012-11-07 16:26:08 +01:00

Changed status to: 'Open'

Brecht Van Lommel commented

2012-11-07 17:27:38 +01:00

%%%Fix in svn, thanks for the report.%%%

Brecht Van Lommel commented

2012-11-07 17:27:38 +01:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2012-11-07 17:27:38 +01:00

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Segfault adjusting Cycles motion blur via Python #33114

2 0x0000000001dd8240 in GPU_pass_free (pass=0x8a395c8)

3 0x0000000001dcb2a8 in GPU_material_free (ma=0x6d01ba8)

4 0x000000000199d722 in scene_changed (bmain=0x726f6d8, UNUSED_scene=

5 0x000000000199d80a in ED_render_id_flush_update (bmain=0x726f6d8, id=

6 0x0000000001f7ed6c in dag_editors_id_update (bmain=0x726f6d8, id=0x6ce06b8)

7 0x0000000001f813a7 in dag_id_flush_update (sce=0x6ce06b8, id=0x6ce06b8)

8 0x0000000001f81497 in DAG_ids_flush_tagged (bmain=0x726f6d8)

9 0x0000000001fa8e5a in BKE_scene_update_for_newframe (bmain=0x726f6d8, sce=

10 0x0000000001d4d16c in RE_engine_render (re=0x8971528, do_all=0)

11 0x0000000001d8c42f in do_render_3d (re=0x8971528)

12 0x0000000001d8d2ec in do_render_fields_blur_3d (re=0x8971528)

13 0x0000000001d8e477 in do_render_composite_fields_blur_3d (re=0x8971528)

14 0x0000000001d8edf0 in do_render_all_options (re=0x8971528)

15 0x0000000001d9072e in RE_BlenderAnim (re=0x8971528, bmain=0x726f6d8, scene=

16 0x0000000001999a7b in render_startjob (rjv=0xa85a688, stop=0x89b31dc,

17 0x00000000017a1300 in do_job_thread (job_v=0x89b3168)

18 0x00000000024a6e3f in tslot_thread_start (tslot_p=0x72daa18)