sequencer segfaults on loading a video clip #28602

New Issue

bassam kurdali · 2011-09-10T04:28:38+02:00

bassam kurdali commented

2011-09-10 04:28:38 +02:00

%%%as it sounds, loading this movie clip segfaults the sequencer, with the following stacktrace. I've attached the video in question.
OS Linux (10.10 ubuntu), nvidia gfx, 64 bit, intel cpu. ffmpeg from the blender ffmpeg lib in svn.
Program received signal SIGSEGV, Segmentation fault.
0x00007fffe0126000 in ?? ()
(gdb) bt

0 0x00007fffe0126000 in ?? ()
1 0x0000000001747a4f in hyscale_fast_MMX2 ()
2 0x00007fffe0133fa0 in ?? ()
3 0x00000000017378fa in swScale ()
4 0x000000000171fe0b in sws_scale ()
5 0x000000000106946f in ffmpeg_postprocess (anim=0x7fffe00e4f38)

  at source/blender/imbuf/intern/anim_movie.c:801

6 0x000000000106a2de in ffmpeg_fetchibuf (anim=0x7fffe00e4f38, position=0,

  tc=IMB_TC_NONE) at source/blender/imbuf/intern/anim_movie.c:1162

7 0x000000000106a9a8 in IMB_anim_absolute (anim=0x7fffe00e4f38, position=0,

  tc=IMB_TC_NONE, preview_size=IMB_PROXY_NONE)
  at source/blender/imbuf/intern/anim_movie.c:1401

8 0x0000000000f6339a in openanim (

  name=0x7fffffffdd20 "/home/bassam/reel/a1s16.mp4", flags=1, streamindex=0)
  at source/blender/blenkernel/intern/image.c:1382

9 0x0000000000f3792d in sequencer_add_movie_strip (C=0x37bdfa8,

  seqbasep=0x7fffe00e75c0, seq_load=0x7fffffffe020)
  at source/blender/blenkernel/intern/sequencer.c:3686

10 0x0000000000ba0480 in sequencer_add_generic_strip_exec (C=0x37bdfa8,

  op=0x7fffe00e3808, seq_load_func=0xf3788c <sequencer_add_movie_strip>)
  at source/blender/editors/space_sequencer/sequencer_add.c:330

11 0x0000000000ba0646 in sequencer_add_movie_strip_exec (C=0x37bdfa8,

  op=0x7fffe00e3808)

- Type <return> to continue, or q <return> to quit---

  at source/blender/editors/space_sequencer/sequencer_add.c:363

12 0x000000000091b7cd in wm_handler_fileselect_call (C=0x37bdfa8,

  handlers=0x3c16e98, handler=0x7fffe00e3448, event=0x7fffe00e3d08)
  at source/blender/windowmanager/intern/wm_event_system.c:1381

13 0x000000000091bda6 in wm_handlers_do (C=0x37bdfa8, event=0x7fffe00e3d08,

  handlers=0x3c16e98)
  at source/blender/windowmanager/intern/wm_event_system.c:1527

14 0x000000000091c9a5 in wm_event_do_handlers (C=0x37bdfa8)

  at source/blender/windowmanager/intern/wm_event_system.c:1821

15 0x000000000090530b in WM_main (C=0x37bdfa8)

  at source/blender/windowmanager/intern/wm.c:380

16 0x00000000009028f9 in main ()

%%%

%%%as it sounds, loading this movie clip segfaults the sequencer, with the following stacktrace. I've attached the video in question. OS Linux (10.10 ubuntu), nvidia gfx, 64 bit, intel cpu. ffmpeg from the blender ffmpeg lib in svn. Program received signal SIGSEGV, Segmentation fault. 0x00007fffe0126000 in ?? () (gdb) bt - 0 0x00007fffe0126000 in ?? () - 1 0x0000000001747a4f in hyscale_fast_MMX2 () - 2 0x00007fffe0133fa0 in ?? () - 3 0x00000000017378fa in swScale () - 4 0x000000000171fe0b in sws_scale () - 5 0x000000000106946f in ffmpeg_postprocess (anim=0x7fffe00e4f38) ``` at source/blender/imbuf/intern/anim_movie.c:801 ``` # 6 0x000000000106a2de in ffmpeg_fetchibuf (anim=0x7fffe00e4f38, position=0, ``` tc=IMB_TC_NONE) at source/blender/imbuf/intern/anim_movie.c:1162 ``` # 7 0x000000000106a9a8 in IMB_anim_absolute (anim=0x7fffe00e4f38, position=0, ``` tc=IMB_TC_NONE, preview_size=IMB_PROXY_NONE) at source/blender/imbuf/intern/anim_movie.c:1401 ``` # 8 0x0000000000f6339a in openanim ( ``` name=0x7fffffffdd20 "/home/bassam/reel/a1s16.mp4", flags=1, streamindex=0) at source/blender/blenkernel/intern/image.c:1382 ``` # 9 0x0000000000f3792d in sequencer_add_movie_strip (C=0x37bdfa8, ``` seqbasep=0x7fffe00e75c0, seq_load=0x7fffffffe020) at source/blender/blenkernel/intern/sequencer.c:3686 ``` # 10 0x0000000000ba0480 in sequencer_add_generic_strip_exec (C=0x37bdfa8, ``` op=0x7fffe00e3808, seq_load_func=0xf3788c <sequencer_add_movie_strip>) at source/blender/editors/space_sequencer/sequencer_add.c:330 ``` # 11 0x0000000000ba0646 in sequencer_add_movie_strip_exec (C=0x37bdfa8, ``` op=0x7fffe00e3808) ``` - Type <return> to continue, or q <return> to quit--- ``` at source/blender/editors/space_sequencer/sequencer_add.c:363 ``` # 12 0x000000000091b7cd in wm_handler_fileselect_call (C=0x37bdfa8, ``` handlers=0x3c16e98, handler=0x7fffe00e3448, event=0x7fffe00e3d08) at source/blender/windowmanager/intern/wm_event_system.c:1381 ``` # 13 0x000000000091bda6 in wm_handlers_do (C=0x37bdfa8, event=0x7fffe00e3d08, ``` handlers=0x3c16e98) at source/blender/windowmanager/intern/wm_event_system.c:1527 ``` # 14 0x000000000091c9a5 in wm_event_do_handlers (C=0x37bdfa8) ``` at source/blender/windowmanager/intern/wm_event_system.c:1821 ``` # 15 0x000000000090530b in WM_main (C=0x37bdfa8) ``` at source/blender/windowmanager/intern/wm.c:380 ``` # 16 0x00000000009028f9 in main () %%%

bassam kurdali commented

2011-09-10 04:28:38 +02:00

Changed status to: 'Open'

Sergey Sharybin commented

2011-09-10 21:01:26 +02:00

%%%Looks like it's a regression in new FFmpeg. Or probably was changed in behavior so our usage isn't correct now.

Developer note: crash happens only when using SWS_FAST_BILINEAR rescaling and avpicture_fill() called before sws_scale(). Using SWS_BILINEAR or not using avpicture_fill() makes crash go away. This crash doesn't happen with FFmpeg-0.6.3 but happen with 0.8.1, 0.8.3 and 0.7.4.

Attaching smaller program to demonstrate the problem.

Peter, you know FFmpeg better than me, what do you think?%%%

%%%Looks like it's a regression in new FFmpeg. Or probably was changed in behavior so our usage isn't correct now. Developer note: crash happens only when using SWS_FAST_BILINEAR rescaling and avpicture_fill() called before sws_scale(). Using SWS_BILINEAR or not using avpicture_fill() makes crash go away. This crash doesn't happen with FFmpeg-0.6.3 but happen with 0.8.1, 0.8.3 and 0.7.4. Attaching smaller program to demonstrate the problem. Peter, you know FFmpeg better than me, what do you think?%%%

Sergey Sharybin commented

2011-09-19 15:42:39 +02:00

%%%This crash was caused by FFmpeg compiled with gcc-4.6. swscale has git issues with this version of compiler. Patch for FFmpeg is available on debian-multimedia repo, but it's not in FFmpeg sources yet. I've re-compiled FFmpeg with older gcc and commited libs to libs repo. Also, buildbot and release environments now using this libs.

Thanks for the report, closing now.%%%

%%%This crash was caused by FFmpeg compiled with gcc-4.6. swscale has git issues with this version of compiler. Patch for FFmpeg is available on debian-multimedia repo, but it's not in FFmpeg sources yet. I've re-compiled FFmpeg with older gcc and commited libs to libs repo. Also, buildbot and release environments now using this libs. Thanks for the report, closing now.%%%

Sergey Sharybin commented

2011-09-19 15:42:39 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2011-09-19 15:42:39 +02:00

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sequencer segfaults on loading a video clip #28602

6 0x000000000106a2de in ffmpeg_fetchibuf (anim=0x7fffe00e4f38, position=0,

7 0x000000000106a9a8 in IMB_anim_absolute (anim=0x7fffe00e4f38, position=0,

8 0x0000000000f6339a in openanim (

9 0x0000000000f3792d in sequencer_add_movie_strip (C=0x37bdfa8,

10 0x0000000000ba0480 in sequencer_add_generic_strip_exec (C=0x37bdfa8,

11 0x0000000000ba0646 in sequencer_add_movie_strip_exec (C=0x37bdfa8,

12 0x000000000091b7cd in wm_handler_fileselect_call (C=0x37bdfa8,

13 0x000000000091bda6 in wm_handlers_do (C=0x37bdfa8, event=0x7fffe00e3d08,

14 0x000000000091c9a5 in wm_event_do_handlers (C=0x37bdfa8)

15 0x000000000090530b in WM_main (C=0x37bdfa8)

16 0x00000000009028f9 in main ()