From: Walter Alejandro Iglesias <wai@roquesor.com>
Subject: Blender crashes when rendering animation to ffmpeg video
To: ports@openbsd.org
Date: Sat, 8 Nov 2025 09:25:18 +0100

Hello,

Blender crashes always I run "render animation" to a ffmpeg video.  (It
has no problems when rendering to a image sequence).

Using latest snapshot.


Thread 2 received signal SIGILL, Illegal instruction.
[Switching to thread 232396 of process 54210]
0x00000956337d3160 in ff_rgbaToY_avx2 () from /usr/local/lib/libswscale.so.9.0
(gdb) bt
#0  0x00000956337d3160 in ff_rgbaToY_avx2 () from /usr/local/lib/libswscale.so.9.0
#1  0x00000956337037aa in lum_convert () from /usr/local/lib/libswscale.so.9.0
#2  0x000009563379aa6f in ff_swscale () from /usr/local/lib/libswscale.so.9.0
#3  0x000009563379d7d1 in scale_internal () from /usr/local/lib/libswscale.so.9.0
#4  0x000009563379e92e in ff_sws_slice_worker () from /usr/local/lib/libswscale.so.9.0
#5  0x000009567b1e49d1 in avpriv_slicethread_execute () from /usr/local/lib/libavutil.so.17.0
#6  0x000009563379ce04 in sws_receive_slice () from /usr/local/lib/libswscale.so.9.0
#7  0x000009563379dc2a in sws_scale_frame () from /usr/local/lib/libswscale.so.9.0
#8  0x000009540b1fc249 in generate_video_frame (context=0x95611cee418, image=0x956856aa008) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/imbuf/movie/intern/movie_write.cc:306
#9  ffmpeg_movie_append (context=0x95611cee418, rd=0x956c9927138, start_frame=1, frame=1, image=0x956856aa008, suffix=0x95408d84ad1 "", reports=<optimized out>) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/imbuf/movie/intern/movie_write.cc:1436
#10 MOV_write_append (writer=0x95611cee418, rd=0x956c9927138, start_frame=1, frame=1, image=0x956856aa008, suffix=0x95408d84ad1 "", reports=0x956a333abc8) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/imbuf/movie/intern/movie_write.cc:1583
#11 0x000009540b1e9e59 in RE_WriteRenderViewsMovie (reports=0x956a333abc8, rr=<optimized out>, scene=0x9561d3d2020, rd=0x956c9927138, movie_writers=0x956c9928518, totvideos=1, preview=<optimized out>) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/render/intern/pipeline.cc:2240
#12 0x000009540b1e9507 in do_write_image_or_movie (re=0x956c9927018, bmain=0x95620d8d008, scene=0x9561d3d2020, totvideos=1, filepath_override=0x0) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/render/intern/pipeline.cc:2323
#13 0x000009540b1ea569 in RE_RenderAnim (re=0x956c9927018, bmain=0x95620d8d008, scene=0x9561d3d2020, single_layer=<optimized out>, camera_override=0x0, sfra=<optimized out>, efra=250, tfra=1) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/render/intern/pipeline.cc:2631
#14 0x000009540c60a09e in render_startjob (rjv=0x956a858b818, worker_status=<optimized out>) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/editors/render/render_internal.cc:703
#15 0x000009540b239fac in do_job_thread (job_v=0x956519d6608) at /usr/obj/ports/blender-4.5.3/blender-4.5.3/source/blender/windowmanager/intern/wm_jobs.cc:399
#16 0x0000095631029c82 in _rthread_start (v=0x956337d3160 <ff_rgbaToY_avx2>) at /usr/src/lib/librthread/rthread.c:99
#17 0x00000956385a4d9a in __tfork_thread () at /usr/src/lib/libc/arch/amd64/sys/tfork_thread.S:87


-- 
Walter