Blender freezes when trying to render from python script with turned on eevee motion blur. #80373

New Issue

Sham · 2020-09-02T12:20:07+02:00

Sham commented

2020-09-02 12:20:07 +02:00

System Information
Operating system: Windows 10
Graphics card: GTX 1080

Blender Version
Broken: 2.90 and 2.91 alpha
Worked: None

Short description of error
Blender freezes when trying to render a frame with motion blur enabled in eevee renderer.

Exact steps for others to reproduce the error

Create a simple cube and apply a rotating animation on it.
Go to render settings tab, switch to eevee renderer and enable motion blur (you can keep the default values).

Switch to scripting layout and write the following script:

import bpy

scene = bpy.context.scene

scene.render.image_settings.file_format = 'PNG'
scene.render.filepath = "C:/tmp/image.png"

bpy.ops.render.render(write_still = 1)

Try to run the script and you will find that Blender is freezing.

note: if you turned off motion blur it will render just fine. the problem is when you enable the motion blur.

Used blender file
basic_scene_01.blend

**System Information** Operating system: Windows 10 Graphics card: GTX 1080 **Blender Version** Broken: 2.90 and 2.91 alpha Worked: None **Short description of error** Blender freezes when trying to render a frame with motion blur enabled in eevee renderer. **Exact steps for others to reproduce the error** - Create a simple cube and apply a rotating animation on it. - Go to render settings tab, switch to eevee renderer and enable motion blur (you can keep the default values). # Switch to scripting layout and write the following script: ``` import bpy scene = bpy.context.scene scene.render.image_settings.file_format = 'PNG' scene.render.filepath = "C:/tmp/image.png" bpy.ops.render.render(write_still = 1) ``` Try to run the script and you will find that Blender is freezing. > note: if you turned off motion blur it will render just fine. the problem is when you enable the motion blur. **Used blender file** [basic_scene_01.blend](https://archive.blender.org/developer/F8832259/basic_scene_01.blend)

Sham commented

2020-09-02 12:20:07 +02:00

Added subscriber: @VFX-Kitchen

Raimund Klink commented

2020-09-02 13:36:59 +02:00

Added subscriber: @Raimund58

Germano Cavalcante commented

2020-09-03 16:10:45 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-09-03 16:10:45 +02:00

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

Germano Cavalcante commented

2020-09-03 16:10:45 +02:00

I can confirm.
The problem is "solved" if I add an "INVOKE_DEFAULT" to the operator.

 	[External Code]	
>	blender.exe!BLI_ticket_mutex_lock(TicketMutex * ticket) Line 584	C++

 	blender.exe!DRW_notify_view_update(const DRWUpdateContext * update_ctx) Line 1240	C
 	blender.exe!ED_render_scene_update(const DEGEditorUpdateContext * update_ctx, int updated) Line 119	C
 	blender.exe!DEG_ids_check_recalc(Main * bmain, Depsgraph * depsgraph, Scene * scene, ViewLayer * view_layer, bool time) Line 830	C++
 	blender.exe!BKE_scene_graph_update_for_newframe(Depsgraph * depsgraph) Line 1598	C
 	blender.exe!RE_engine_frame_set(RenderEngine * engine, int frame, float subframe) Line 642	C
 	blender.exe!DRW_render_set_time(RenderEngine * engine, Depsgraph * depsgraph, int frame, float subframe) Line 1954	C
 	blender.exe!eevee_render_to_image(void * vedata, RenderEngine * engine, RenderLayer * render_layer, const rcti * rect) Line 484	C
 	blender.exe!DRW_render_to_image(RenderEngine * engine, Depsgraph * depsgraph) Line 1779	C
 	blender.exe!RE_engine_render(Render * re, int do_all) Line 880	C
 	blender.exe!do_render(Render * re) Line 1216	C
 	blender.exe!do_render_composite(Render * re) Line 1354	C
 	blender.exe!do_render_all_options(Render * re) Line 1616	C
 	blender.exe!RE_RenderFrame(Render * re, Main * bmain, Scene * scene, ViewLayer * single_layer, Object * camera_override, int frame, const bool write_still) Line 2015	C
 	blender.exe!screen_render_exec(bContext * C, wmOperator * op) Line 364	C
 	blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1312	C
 	blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1547	C
 	blender.exe!WM_operator_call_py(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties, ReportList * reports, const bool is_undo) Line 1644	C
 	blender.exe!pyop_call(_object * UNUSED_self, _object * args) Line 279	C
 	python37.dll!_PyMethodDef_RawFastCallKeywords(PyMethodDef * method, _object * self, _object * const * args, __int64 nargs, _object * kwnames) Line 698	C
 	[Inline Frame] python37.dll!_PyCFunction_FastCallKeywords(_object *) Line 734	C
 	python37.dll!call_function(_object * * * pp_stack, __int64 oparg, _object * kwnames) Line 4568	C
 	python37.dll!_PyEval_EvalFrameDefault(_frame * f, int throwflag) Line 3125	C
 	[Inline Frame] python37.dll!PyEval_EvalFrameEx(_frame *) Line 547	C
 	python37.dll!_PyEval_EvalCodeWithName(_object * _co, _object * globals, _object * locals, _object * const * args, __int64 argcount, _object * const * kwnames, _object * const * kwargs, __int64 kwcount, int kwstep, _object * const * defs, __int64 defcount, _object * kwdefs, _object * closure, _object * name, _object * qualname) Line 3930	C
 	python37.dll!_PyFunction_FastCallDict(_object * func, _object * const * args, __int64 nargs, _object * kwargs) Line 376	C
 	python37.dll!_PyObject_Call_Prepend(_object * callable, _object * obj, _object * args, _object * kwargs) Line 908	C
 	python37.dll!slot_tp_call(_object * self, _object * args, _object * kwds) Line 6403	C
 	python37.dll!_PyObject_FastCallKeywords(_object * callable, _object * const * stack, __int64 nargs, _object * kwnames) Line 201	C
 	python37.dll!call_function(_object * * * pp_stack, __int64 oparg, _object * kwnames) Line 4627	C
 	python37.dll!_PyEval_EvalFrameDefault(_frame * f, int throwflag) Line 3140	C
 	[Inline Frame] python37.dll!PyEval_EvalFrameEx(_frame *) Line 547	C
 	python37.dll!_PyEval_EvalCodeWithName(_object * _co, _object * globals, _object * locals, _object * const * args, __int64 argcount, _object * const * kwnames, _object * const * kwargs, __int64 kwcount, int kwstep, _object * const * defs, __int64 defcount, _object * kwdefs, _object * closure, _object * name, _object * qualname) Line 3930	C
 	[Inline Frame] python37.dll!PyEval_EvalCodeEx(_object *) Line 3959	C
 	python37.dll!PyEval_EvalCode(_object * co, _object * globals, _object * locals) Line 530	C
 	blender.exe!python_script_exec(bContext * C, const unsigned char * fn, Text * text, ReportList * reports, const bool do_jump) Line 127	C
 	blender.exe!BPY_run_text(bContext * C, Text * text, ReportList * reports, const bool do_jump) Line 222	C
 	blender.exe!text_run_script(bContext * C, ReportList * reports) Line 760	C
 	blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1312	C
 	blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1516	C
 	blender.exe!WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties) Line 1562	C
 	blender.exe!ui_apply_but_funcs_after(bContext * C) Line 925	C
 	blender.exe!ui_handler_region_menu(bContext * C, const wmEvent * event, void * UNUSED_userdata) Line 10732	C
 	blender.exe!wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, int always_pass) Line 641	C
 	blender.exe!wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2756	C
 	blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2868	C
 	blender.exe!wm_event_do_handlers(bContext * C) Line 3292	C
 	blender.exe!WM_main(bContext * C) Line 485	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 531	C
 	[External Code]

I can confirm. The problem is "solved" if I add an `"INVOKE_DEFAULT"` to the operator. ```lines [External Code] > blender.exe!BLI_ticket_mutex_lock(TicketMutex * ticket) Line 584 C++ blender.exe!DRW_notify_view_update(const DRWUpdateContext * update_ctx) Line 1240 C blender.exe!ED_render_scene_update(const DEGEditorUpdateContext * update_ctx, int updated) Line 119 C blender.exe!DEG_ids_check_recalc(Main * bmain, Depsgraph * depsgraph, Scene * scene, ViewLayer * view_layer, bool time) Line 830 C++ blender.exe!BKE_scene_graph_update_for_newframe(Depsgraph * depsgraph) Line 1598 C blender.exe!RE_engine_frame_set(RenderEngine * engine, int frame, float subframe) Line 642 C blender.exe!DRW_render_set_time(RenderEngine * engine, Depsgraph * depsgraph, int frame, float subframe) Line 1954 C blender.exe!eevee_render_to_image(void * vedata, RenderEngine * engine, RenderLayer * render_layer, const rcti * rect) Line 484 C blender.exe!DRW_render_to_image(RenderEngine * engine, Depsgraph * depsgraph) Line 1779 C blender.exe!RE_engine_render(Render * re, int do_all) Line 880 C blender.exe!do_render(Render * re) Line 1216 C blender.exe!do_render_composite(Render * re) Line 1354 C blender.exe!do_render_all_options(Render * re) Line 1616 C blender.exe!RE_RenderFrame(Render * re, Main * bmain, Scene * scene, ViewLayer * single_layer, Object * camera_override, int frame, const bool write_still) Line 2015 C blender.exe!screen_render_exec(bContext * C, wmOperator * op) Line 364 C blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1312 C blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1547 C blender.exe!WM_operator_call_py(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties, ReportList * reports, const bool is_undo) Line 1644 C blender.exe!pyop_call(_object * UNUSED_self, _object * args) Line 279 C python37.dll!_PyMethodDef_RawFastCallKeywords(PyMethodDef * method, _object * self, _object * const * args, __int64 nargs, _object * kwnames) Line 698 C [Inline Frame] python37.dll!_PyCFunction_FastCallKeywords(_object *) Line 734 C python37.dll!call_function(_object * * * pp_stack, __int64 oparg, _object * kwnames) Line 4568 C python37.dll!_PyEval_EvalFrameDefault(_frame * f, int throwflag) Line 3125 C [Inline Frame] python37.dll!PyEval_EvalFrameEx(_frame *) Line 547 C python37.dll!_PyEval_EvalCodeWithName(_object * _co, _object * globals, _object * locals, _object * const * args, __int64 argcount, _object * const * kwnames, _object * const * kwargs, __int64 kwcount, int kwstep, _object * const * defs, __int64 defcount, _object * kwdefs, _object * closure, _object * name, _object * qualname) Line 3930 C python37.dll!_PyFunction_FastCallDict(_object * func, _object * const * args, __int64 nargs, _object * kwargs) Line 376 C python37.dll!_PyObject_Call_Prepend(_object * callable, _object * obj, _object * args, _object * kwargs) Line 908 C python37.dll!slot_tp_call(_object * self, _object * args, _object * kwds) Line 6403 C python37.dll!_PyObject_FastCallKeywords(_object * callable, _object * const * stack, __int64 nargs, _object * kwnames) Line 201 C python37.dll!call_function(_object * * * pp_stack, __int64 oparg, _object * kwnames) Line 4627 C python37.dll!_PyEval_EvalFrameDefault(_frame * f, int throwflag) Line 3140 C [Inline Frame] python37.dll!PyEval_EvalFrameEx(_frame *) Line 547 C python37.dll!_PyEval_EvalCodeWithName(_object * _co, _object * globals, _object * locals, _object * const * args, __int64 argcount, _object * const * kwnames, _object * const * kwargs, __int64 kwcount, int kwstep, _object * const * defs, __int64 defcount, _object * kwdefs, _object * closure, _object * name, _object * qualname) Line 3930 C [Inline Frame] python37.dll!PyEval_EvalCodeEx(_object *) Line 3959 C python37.dll!PyEval_EvalCode(_object * co, _object * globals, _object * locals) Line 530 C blender.exe!python_script_exec(bContext * C, const unsigned char * fn, Text * text, ReportList * reports, const bool do_jump) Line 127 C blender.exe!BPY_run_text(bContext * C, Text * text, ReportList * reports, const bool do_jump) Line 222 C blender.exe!text_run_script(bContext * C, ReportList * reports) Line 760 C blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1312 C blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1516 C blender.exe!WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties) Line 1562 C blender.exe!ui_apply_but_funcs_after(bContext * C) Line 925 C blender.exe!ui_handler_region_menu(bContext * C, const wmEvent * event, void * UNUSED_userdata) Line 10732 C blender.exe!wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, int always_pass) Line 641 C blender.exe!wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2756 C blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2868 C blender.exe!wm_event_do_handlers(bContext * C) Line 3292 C blender.exe!WM_main(bContext * C) Line 485 C blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 531 C [External Code] ```

Evan Wilson commented

2020-09-04 03:26:29 +02:00

Closed as duplicate of #79889

Evan Wilson closed this issue

2020-09-04 03:26:29 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Blender freezes when trying to render from python script with turned on eevee motion blur. #80373

Switch to scripting layout and write the following script: