[FFmpeg-trac] #2489(FFmpeg:new): 'segmentation fault' / 'double free pointer' when concatenating segments with subtitles
FFmpeg
trac at avcodec.org
Sun Apr 21 22:39:49 CEST 2013
#2489: 'segmentation fault' / 'double free pointer' when concatenating segments
with subtitles
-----------------------------------+--------------------------------------
Reporter: ronny1982 | Type: defect
Status: new | Priority: minor
Component: FFmpeg | Version: git-master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-----------------------------------+--------------------------------------
I'm trying to concatenate video segments with subtitles using the demuxer
concat. I tried video clips with srt and ass subtitles, with commands to
copy, remove and encode subtitles, but all of them failed:
{{{
ffmpeg -f concat -i "numbers.concat" -c copy -y "numbers-2x050.mkv"
ffmpeg -f concat -i "numbers.concat" -sn -c:v copy -y "numbers-2x050.mkv"
ffmpeg -f concat -i "numbers.concat" -c:s ass -c:v copy -y "numbers-
2x050.mkv"
}}}
tested with ffmpeg snapshot (2013-04-21)
tested with ffmpeg 1.2 (2013-03-15)
output for segmentation fault:
{{{
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Apr 11 2013 01:45:55 with gcc 4.7 (Ubuntu/Linaro
4.7.2-2ubuntu1)
configuration: --disable-shared --enable-static --enable-gpl --enable-
nonfree --enable-zlib --enable-bzlib --enable-libfreetype --enable-
fontconfig --enable-libass --enable-libfaac --enable-libfdk_aac --enable-
libmp3lame --enable-libvorbis --enable-libtheora --enable-libxvid
--enable-libx264 --enable-libvpx --enable-libbluray --enable-runtime-
cpudetect --disable-debug --extra-libs=' -lxml2 -ldl'
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[concat @ 0x2543fa0] Estimating duration from bitrate, this may be
inaccurate
Input #0, concat, from 'numbers.concat':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: h264 (Main), yuv420p, 640x360 [SAR 1:1 DAR 16:9],
25 fps, 25 tbr, 1k tbn, 50 tbc
Stream #0:1: Subtitle: subrip
Output #0, matroska, to 'numbers-2x050.mkv':
Metadata:
encoder : Lavf54.63.104
Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 640x360 [SAR
1:1 DAR 16:9], q=2-31, 25 fps, 1k tbn, 1k tbc
Stream #0:1: Subtitle: subrip
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
Segmentation fault
}}}
output for double free pointer:
{{{
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Apr 11 2013 01:45:55 with gcc 4.7 (Ubuntu/Linaro
4.7.2-2ubuntu1)
configuration: --disable-shared --enable-static --enable-gpl --enable-
nonfree --enable-zlib --enable-bzlib --enable-libfreetype --enable-
fontconfig --enable-libass --enable-libfaac --enable-libfdk_aac --enable-
libmp3lame --enable-libvorbis --enable-libtheora --enable-libxvid
--enable-libx264 --enable-libvpx --enable-libbluray --enable-runtime-
cpudetect --disable-debug --extra-libs=' -lxml2 -ldl'
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[concat @ 0x23a9fe0] Estimating duration from bitrate, this may be
inaccurate
Input #0, concat, from 'numbers.concat':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: h264 (Main), yuv420p, 640x360 [SAR 1:1 DAR 16:9],
25 fps, 25 tbr, 1k tbn, 50 tbc
Stream #0:1: Subtitle: subrip
Output #0, matroska, to 'numbers-2x050.mkv':
Metadata:
encoder : Lavf54.63.104
Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 640x360 [SAR
1:1 DAR 16:9], q=2-31, 25 fps, 1k tbn, 1k tbc
Stream #0:1: Subtitle: ssa
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (subrip -> ass)
Press [q] to stop, [?] for help
*** glibc detected ***
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac: double free or corruption (out): 0x00000000023b6200 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7eb96)[0x7fa64fc17b96]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0xbd930c]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x5bc6fe]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x5bc80c]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x5bca3d]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x4fd9a8]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x5b5394]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x5b7285]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x5b8042]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x46ec05]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x45e590]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7fa64fbba76d]
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac[0x45ec09]
======= Memory map: ========
00400000-01428000 r-xp 00000000 08:02 27394536
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac
01628000-01629000 r--p 01028000 08:02 27394536
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac
01629000-01663000 rw-p 01029000 08:02 27394536
/home/ronny/Documents/development/ffmpegyag/dist/linux/bin/ffmpeg-
hi10-heaac
01663000-01d22000 rw-p 00000000 00:00 0
02394000-02469000 rw-p 00000000 00:00 0
[heap]
7fa64f658000-7fa64f66d000 r-xp 00000000 08:12 5196
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fa64f66d000-7fa64f86c000 ---p 00015000 08:12 5196
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fa64f86c000-7fa64f86d000 r--p 00014000 08:12 5196
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fa64f86d000-7fa64f86e000 rw-p 00015000 08:12 5196
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fa64f86e000-7fa64f96f000 rw-p 00000000 00:00 0
7fa64f96f000-7fa64f996000 r-xp 00000000 08:12 9146
/lib/x86_64-linux-gnu/libexpat.so.1.5.2
7fa64f996000-7fa64fb96000 ---p 00027000 08:12 9146
/lib/x86_64-linux-gnu/libexpat.so.1.5.2
7fa64fb96000-7fa64fb98000 r--p 00027000 08:12 9146
/lib/x86_64-linux-gnu/libexpat.so.1.5.2
7fa64fb98000-7fa64fb99000 rw-p 00029000 08:12 9146
/lib/x86_64-linux-gnu/libexpat.so.1.5.2
7fa64fb99000-7fa64fd4e000 r-xp 00000000 08:12 157
/lib/x86_64-linux-gnu/libc-2.15.so
7fa64fd4e000-7fa64ff4d000 ---p 001b5000 08:12 157
/lib/x86_64-linux-gnu/libc-2.15.so
7fa64ff4d000-7fa64ff51000 r--p 001b4000 08:12 157
/lib/x86_64-linux-gnu/libc-2.15.so
7fa64ff51000-7fa64ff53000 rw-p 001b8000 08:12 157
/lib/x86_64-linux-gnu/libc-2.15.so
7fa64ff53000-7fa64ff58000 rw-p 00000000 00:00 0
7fa64ff58000-7fa64ff70000 r-xp 00000000 08:12 268
/lib/x86_64-linux-gnu/libpthread-2.15.so
7fa64ff70000-7fa65016f000 ---p 00018000 08:12 268
/lib/x86_64-linux-gnu/libpthread-2.15.so
7fa65016f000-7fa650170000 r--p 00017000 08:12 268
/lib/x86_64-linux-gnu/libpthread-2.15.so
7fa650170000-7fa650171000 rw-p 00018000 08:12 268
/lib/x86_64-linux-gnu/libpthread-2.15.so
7fa650171000-7fa650175000 rw-p 00000000 00:00 0
7fa650175000-7fa650177000 r-xp 00000000 08:12 150
/lib/x86_64-linux-gnu/libdl-2.15.so
7fa650177000-7fa650377000 ---p 00002000 08:12 150
/lib/x86_64-linux-gnu/libdl-2.15.so
7fa650377000-7fa650378000 r--p 00002000 08:12 150
/lib/x86_64-linux-gnu/libdl-2.15.so
7fa650378000-7fa650379000 rw-p 00003000 08:12 150
/lib/x86_64-linux-gnu/libdl-2.15.so
7fa650379000-7fa6504ca000 r-xp 00000000 08:12 269022
/usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8
7fa6504ca000-7fa6506c9000 ---p 00151000 08:12 269022
/usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8
7fa6506c9000-7fa6506d1000 r--p 00150000 08:12 269022
/usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8
7fa6506d1000-7fa6506d3000 rw-p 00158000 08:12 269022
/usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8
7fa6506d3000-7fa6506d4000 rw-p 00000000 00:00 0
7fa6506d4000-7fa6506db000 r-xp 00000000 08:12 270
/lib/x86_64-linux-gnu/librt-2.15.so
7fa6506db000-7fa6508da000 ---p 00007000 08:12 270
/lib/x86_64-linux-gnu/librt-2.15.so
7fa6508da000-7fa6508db000 r--p 00006000 08:12 270
/lib/x86_64-linux-gnu/librt-2.15.so
7fa6508db000-7fa6508dc000 rw-p 00007000 08:12 270
/lib/x86_64-linux-gnu/librt-2.15.so
7fa6508dc000-7fa6508f2000 r-xp 00000000 08:12 5286
/lib/x86_64-linux-gnu/libz.so.1.2.3.4
7fa6508f2000-7fa650af1000 ---p 00016000 08:12 5286
/lib/x86_64-linux-gnu/libz.so.1.2.3.4
7fa650af1000-7fa650af2000 r--p 00015000 08:12 5286
/lib/x86_64-linux-gnu/libz.so.1.2.3.4
7fa650af2000-7fa650af3000 rw-p 00016000 08:12 5286
/lib/x86_64-linux-gnu/libz.so.1.2.3.4
7fa650af3000-7fa650b02000 r-xp 00000000 08:12 5174
/lib/x86_64-linux-gnu/libbz2.so.1.0.4
7fa650b02000-7fa650d01000 ---p 0000f000 08:12 5174
/lib/x86_64-linux-gnu/libbz2.so.1.0.4
7fa650d01000-7fa650d02000 r--p 0000e000 08:12 5174
/lib/x86_64-linux-gnu/libbz2.so.1.0.4
7fa650d02000-7fa650d03000 rw-p 0000f000 08:12 5174
/lib/x86_64-linux-gnu/libbz2.so.1.0.4
7fa650d03000-7fa650d18000 r-xp 00000000 08:12 265262
/usr/lib/libfribidi.so.0.3.1
7fa650d18000-7fa650f17000 ---p 00015000 08:12 265262
/usr/lib/libfribidi.so.0.3.1
7fa650f17000-7fa650f18000 r--p 00014000 08:12 265262
/usr/lib/libfribidi.so.0.3.1
7fa650f18000-7fa650f19000 rw-p 00015000 08:12 265262
/usr/lib/libfribidi.so.0.3.1
7fa650f19000-7fa650f4d000 r-xp 00000000 08:12 261571
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1.4.4
7fa650f4d000-7fa65114d000 ---p 00034000 08:12 261571
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1.4.4
7fa65114d000-7fa65114e000 r--p 00034000 08:12 261571
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1.4.4
7fa65114e000-7fa65114f000 rw-p 00035000 08:12 261571
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1.4.4
7fa65114f000-7fa65124a000 r-xp 00000000 08:12 1112
/lib/x86_64-linux-gnu/libm-2.15.so
7fa65124a000-7fa651449000 ---p 000fb000 08:12 1112
/lib/x86_64-linux-gnu/libm-2.15.so
7fa651449000-7fa65144a000 r--p 000fa000 08:12 1112
/lib/x86_64-linux-gnu/libm-2.15.so
7fa65144a000-7fa65144b000 rw-p 000fb000 08:12 1112
/lib/x86_64-linux-gnu/libm-2.15.so
7fa65144b000-7fa6514e1000 r-xp 00000000 08:12 260059
/usr/lib/x86_64-linux-gnu/libfreetype.so.6.8.0
7fa6514e1000-7fa6516e0000 ---p 00096000 08:12 260059
/usr/lib/x86_64-linux-gnu/libfreetype.so.6.8.0
7fa6516e0000-7fa6516e6000 r--p 00095000 08:12 260059
/usr/lib/x86_64-linux-gnu/libfreetype.so.6.8.0
7fa6516e6000-7fa6516e7000 rw-p 0009b000 08:12 260059
/usr/lib/x86_64-linux-gnu/libfreetype.so.6.8.0
7fa6516e7000-7fa651709000 r-xp 00000000 08:12 5006
/lib/x86_64-linux-gnu/ld-2.15.so
7fa6518ea000-7fa6518f1000 rw-p 00000000 00:00 0
7fa651906000-7fa651909000 rw-p 00000000 00:00 0
7fa651909000-7fa65190a000 r--p 00022000 08:12 5006
/lib/x86_64-linux-gnu/ld-2.15.so
7fa65190a000-7fa65190c000 rw-p 00023000 08:12 5006
/lib/x86_64-linux-gnu/ld-2.15.so
7fff59f55000-7fff59f76000 rw-p 00000000 00:00 0
[stack]
7fff59fff000-7fff5a000000 r-xp 00000000 00:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vsyscall]
Aborted
}}}
----
attachements:
[http://ffmpegyag.googlecode.com/files/numbers-050.mkv Subtitled Video
Clip (39KB)]
[http://ffmpegyag.googlecode.com/files/numbers.concat Concat Script (46B)]
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2489>
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