Hi Carl Eugen, > Moritz Barsnick <barsnick <at> gmx.net> writes: > > > I'm trying to reproduce a segmentation fault in ffmpeg > > Please remember that all crashes are important and that > we would really like to know about them!
Of course! I wanted a more lightweight ffmpeg first, and thought I could achieve that within minutes. Anyway, taking the "new" Android movie from this mail to the list: http://ffmpeg.org/pipermail/ffmpeg-user/2015-August/027947.html The first 8 MB of this 147MB file suffice: https://www.dropbox.com/sh/vqqhgqjc7k8ia43/AADXEjavHmJ3Z5dDeuP0OF6Za/3350.mp4 I was fiddling around with it, doing meaningless stuff (which you'll see from the command line below). Yet it crashed. I don't get a meaningful backtrace, unfortunately: barsnick@sunshine:/usr/new/tools/video/ffmpeg/ffmpeg-build-2015-08-13 > gdb --args ./ffmpeg_g -i ~/tmp/crash_bsf.mp4 -c copy -bsf h264_mp4toannexb -f mp4 /dev/null -y GNU gdb (GDB) Fedora (7.3.1-48.fc10.1sunshine) Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "pentium4-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/local/new/tools/video/ffmpeg/ffmpeg-build-2015-08-13/ffmpeg_g...done. (gdb) r Starting program: /usr/local/new/tools/video/ffmpeg/ffmpeg-build-2015-08-13/ffmpeg_g -i /home/barsnick/tmp/crash_bsf.mp4 -c copy -bsf h264_mp4toannexb -f mp4 /dev/null -y [Thread debugging using libthread_db enabled] ffmpeg version N-74425-g1c10c1a Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.3.2 (GCC) 20081105 (Red Hat 4.3.2-7) configuration: --disable-everything --disable-network --disable-vdpau --disable-libxcb --enable-ffmpeg --enable-protocol=file --enable-demuxer=mov --enable-muxer=mp4 --enable-bsf=h264_mp4toannexb libavutil 54. 30.100 / 54. 30.100 libavcodec 56. 57.100 / 56. 57.100 libavformat 56. 40.101 / 56. 40.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 33.100 / 5. 33.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 2.101 / 1. 2.101 Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/barsnick/tmp/crash_bsf.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: isommp42 creation_time : 2015-08-08 22:22:54 Duration: 00:01:00.78, start: 0.000000, bitrate: 1104 kb/s Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 1920x1080, 19958 kb/s, SAR 1:1 DAR 16:9, 24.22 fps, 24.25 tbr, 90k tbn, 90k tbc (default) Metadata: creation_time : 2015-08-08 22:22:54 handler_name : VideoHandle Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 2 channels, 192 kb/s (default) Metadata: creation_time : 2015-08-08 22:22:54 handler_name : SoundHandle [mp4 @ 0x821ab80] Codec for stream 0 does not use global headers but container format requires global headers [mp4 @ 0x821ab80] Codec for stream 1 does not use global headers but container format requires global headers [mp4 @ 0x821ab80] track 1: codec frame size is not set Output #0, mp4, to '/dev/null': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: isommp42 encoder : Lavf56.40.101 Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), none, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 19958 kb/s, 24.22 fps, 24.25 tbr, 90k tbn, 90k tbc (default) Metadata: creation_time : 2015-08-08 22:22:54 handler_name : VideoHandle Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, 192 kb/s (default) Metadata: creation_time : 2015-08-08 22:22:54 handler_name : SoundHandle Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy) Press [q] to stop, [?] for help Program received signal SIGSEGV, Segmentation fault. 0x0071e636 in memcpy () from /lib/libc.so.6 Missing separate debuginfos, use: debuginfo-install glibc-2.9-3.i686 zlib-1.2.3-22.fc10.1sunshine.pentium4 (gdb) thread apply all bt full Thread 1 (Thread 0xb7fd66c0 (LWP 21665)): #0 0x0071e636 in memcpy () from /lib/libc.so.6 No symbol table info available. #1 0x00000000 in ?? () No symbol table info available. (gdb) This is on an ancient x32 machine. I can't reproduce it on a newer machine with modern compilers, libs, OS on x86_64. D'uh. I don't subscribe to ffmpeg-devel (yet), too much traffic for what I'm trying to achieve. I would just post a trac ticket, but perhaps this isn't worth following up? Moritz _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
