Ticket #2213 (closed defect: fixed)
subtitle crash: malloc: *** error [...] incorrect checksum for freed object [...] Abort trap: 6
| Reported by: | julian | Owned by: | |
|---|---|---|---|
| Priority: | important | Component: | undetermined |
| Version: | git-master | Keywords: | crash SIGSEGV ass mov_text |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description (last modified by cehoyos) (diff)
download the problem file (still uploading, up in 2 hours, size 1.305.470.851
bytes):
https://dl.dropbox.com/u/7221986/2.mkv
ffmpeg -i 2.mkv -map 0:0 -map 0:2 -map 0:5 -map 0:4 -map 0:3 -scodec mov_text -vcodec copy -acodec copy 2.mp4
ffmpeg version 1.1.1-tessus Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 20 2013 23:17:33 with llvm-gcc 4.2.1 (LLVM build 2336.1.00)
configuration: --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus --disable-shared --enable-static --disable-ffplay --disable-ffserver --enable-gpl --enable-pthreads --enable-postproc --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libxavs --enable-version3 --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvpx --enable-libgsm --enable-libopus --enable-fontconfig --enable-libfreetype --enable-libass --enable-filters --enable-runtime-cpudetect
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 86.100 / 54. 86.100
libavformat 54. 59.106 / 54. 59.106
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 32.100 / 3. 32.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, matroska,webm, from '2.mkv':
Metadata:
title : Mahou Shoujo Madoka Magika Episode 04 - Miracles and Magic Do Exist
creation_time : 2012-03-04 22:02:52
Duration: 00:24:22.19, start: 0.000000, bitrate: 7142 kb/s
Chapter #0.0: start 0.000000, end 113.155000
Metadata:
title : Prologue
Chapter #0.1: start 113.155000, end 203.120000
Metadata:
title : Opening
Chapter #0.2: start 203.120000, end 774.065000
Metadata:
title : Part A
Chapter #0.3: start 774.065000, end 1345.261000
Metadata:
title : Part B
Chapter #0.4: start 1345.261000, end 1435.100000
Metadata:
title : Ending
Chapter #0.5: start 1435.100000, end 1462.185000
Metadata:
title : Preview
Stream #0:0(jpn): Video: h264 (High 10), yuv420p10le, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Metadata:
title : Video track
Stream #0:1(jpn): Audio: flac, 48000 Hz, stereo, s32 (default)
Metadata:
title : Audio track
Stream #0:2(jpn): Audio: aac, 48000 Hz, stereo, fltp
Metadata:
title : Audio track - Commentary
Stream #0:3(eng): Subtitle: ssa (default)
Metadata:
title : Subtitle track
Stream #0:4(eng): Subtitle: ssa
Metadata:
title : Subtitle track - Commentary
Stream #0:5(eng): Subtitle: ssa
Metadata:
title : Subtitle track - Colorless
Codec 0x18000 is not in the full list.
Stream #0:6: Attachment: unknown_codec
Metadata:
filename : Doradani_Rg_Bold.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:7: Attachment: unknown_codec
Metadata:
filename : Doradani Rg Bold Italic.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:8: Attachment: unknown_codec
Metadata:
filename : FOT-GrecoStd-M-ED3-8v2.otf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:9: Attachment: unknown_codec
Metadata:
filename : PRISTINA-ED3-8v2.TTF
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:10: Attachment: unknown_codec
Metadata:
filename : love-OPv3.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:11: Attachment: unknown_codec
Metadata:
filename : Accolade Regular-ep04.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:12: Attachment: unknown_codec
Metadata:
filename : Aller_Rg-ep04.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:13: Attachment: unknown_codec
Metadata:
filename : angelina.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:14: Attachment: unknown_codec
Metadata:
filename : ARIALUNI-ep04.TTF
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:15: Attachment: unknown_codec
Metadata:
filename : Arista2.0-ep04.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:16: Attachment: unknown_codec
Metadata:
filename : BoltonLight-ep04.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:17: Attachment: unknown_codec
Metadata:
filename : ELPHIN-ep04.TTF
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:18: Attachment: unknown_codec
Metadata:
filename : MadokaRunes-2.0-ep04.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:19: Attachment: unknown_codec
Metadata:
filename : mona-ep04.ttf
mimetype : application/x-truetype-font
Codec 0x18000 is not in the full list.
Stream #0:20: Attachment: unknown_codec
Metadata:
filename : tahoma-ep04.ttf
mimetype : application/x-truetype-font
Output #0, mp4, to '2.mp4':
Metadata:
title : Mahou Shoujo Madoka Magika Episode 04 - Miracles and Magic Do Exist
encoder : Lavf54.59.106
Chapter #0.0: start 0.000000, end 113.155000
Metadata:
title : Prologue
Chapter #0.1: start 113.155000, end 203.120000
Metadata:
title : Opening
Chapter #0.2: start 203.120000, end 774.065000
Metadata:
title : Part A
Chapter #0.3: start 774.065000, end 1345.261000
Metadata:
title : Part B
Chapter #0.4: start 1345.261000, end 1435.100000
Metadata:
title : Ending
Chapter #0.5: start 1435.100000, end 1462.185000
Metadata:
title : Preview
Stream #0:0(jpn): Video: h264 ([33][0][0][0] / 0x0021), yuv420p10le, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 16k tbn, 1k tbc (default)
Metadata:
title : Video track
Stream #0:1(jpn): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo
Metadata:
title : Audio track - Commentary
Stream #0:2(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008)
Metadata:
title : Subtitle track - Colorless
Stream #0:3(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008)
Metadata:
title : Subtitle track - Commentary
Stream #0:4(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008) (default)
Metadata:
title : Subtitle track
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:2 -> #0:1 (copy)
Stream #0:5 -> #0:2 (ass -> mov_text)
Stream #0:4 -> #0:3 (ass -> mov_text)
Stream #0:3 -> #0:4 (ass -> mov_text)
Press [q] to stop, [?] for help
ffmpeg(18551) malloc: *** error for object 0x10202b808: incorrect checksum for freed object - object was probably modified after being freed.
*** set a breakpoint in malloc_error_break to debug
Abort trap: 6
Attachments
-
ticket2213.mkv
(230.3 KB) -
added by cehoyos 4 months ago.
Change History
comment:1 Changed 4 months ago by cehoyos
- Status changed from new to open
- Description modified (diff)
- Priority changed from normal to important
- Version changed from 1.1.1 to git-master
- Keywords crash SIGSEGV ass mov_text added
- Reproduced by developer set
(gdb) r -i ticket2213.mkv -scodec mov_text -map 0 out.mp4
Starting program: ffmpeg_g -i ticket2213.mkv -scodec mov_text -map 0 out.mp4
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
ffmpeg version N-49468-ga084884 Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 31 2013 00:34:25 with gcc 4.7 (SUSE Linux)
configuration: --disable-indev=jack --disable-optimizations --disable-asm --disable-yasm
libavutil 52. 17.100 / 52. 17.100
libavcodec 54. 91.100 / 54. 91.100
libavformat 54. 61.104 / 54. 61.104
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 34.101 / 3. 34.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
Input #0, matroska,webm, from 'ticket2213.mkv':
Metadata:
title : Mahou Shoujo Madoka Magika Episode 04 - Miracles and Magic Do Exist
ENCODER : Lavf54.61.104
Duration: 00:24:20.02, start: 0.000000, bitrate: 1 kb/s
Chapter #0.0: start 0.000000, end 113.155000
Metadata:
title : Prologue
Chapter #0.1: start 113.155000, end 203.120000
Metadata:
title : Opening
Chapter #0.2: start 203.120000, end 774.065000
Metadata:
title : Part A
Chapter #0.3: start 774.065000, end 1345.261000
Metadata:
title : Part B
Chapter #0.4: start 1345.261000, end 1435.100000
Metadata:
title : Ending
Chapter #0.5: start 1435.100000, end 1462.185000
Metadata:
title : Preview
Stream #0:0(eng): Subtitle: ssa (default)
Metadata:
title : Subtitle track
LANGUAGE : eng
Stream #0:1(eng): Subtitle: ssa
Metadata:
title : Subtitle track - Commentary
LANGUAGE : eng
Stream #0:2(eng): Subtitle: ssa
Metadata:
title : Subtitle track - Colorless
LANGUAGE : eng
Output #0, mp4, to 'out.mp4':
Metadata:
title : Mahou Shoujo Madoka Magika Episode 04 - Miracles and Magic Do Exist
encoder : Lavf54.61.104
Chapter #0.0: start 0.000000, end 113.155000
Metadata:
title : Prologue
Chapter #0.1: start 113.155000, end 203.120000
Metadata:
title : Opening
Chapter #0.2: start 203.120000, end 774.065000
Metadata:
title : Part A
Chapter #0.3: start 774.065000, end 1345.261000
Metadata:
title : Part B
Chapter #0.4: start 1345.261000, end 1435.100000
Metadata:
title : Ending
Chapter #0.5: start 1435.100000, end 1462.185000
Metadata:
title : Preview
Stream #0:0(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008) (default)
Metadata:
title : Subtitle track
LANGUAGE : eng
Stream #0:1(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008)
Metadata:
title : Subtitle track - Commentary
LANGUAGE : eng
Stream #0:2(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008)
Metadata:
title : Subtitle track - Colorless
LANGUAGE : eng
Stream mapping:
Stream #0:0 -> #0:0 (ass -> mov_text)
Stream #0:1 -> #0:1 (ass -> mov_text)
Stream #0:2 -> #0:2 (ass -> mov_text)
Press [q] to stop, [?] for help
Program received signal SIGSEGV, Segmentation fault.
0x00000000004f7418 in ff_interleave_packet_per_dts (s=0x16d23c0, out=0x7fffffffd250, pkt=0x0, flush=0) at libavformat/mux.c:646
646 av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
(gdb) bt
#0 0x00000000004f7418 in ff_interleave_packet_per_dts (s=0x16d23c0, out=0x7fffffffd250, pkt=0x0, flush=0) at libavformat/mux.c:646
#1 0x00000000004f77da in interleave_packet (s=0x16d23c0, out=0x7fffffffd250, in=0x0, flush=0) at libavformat/mux.c:725
#2 0x00000000004f7901 in av_interleaved_write_frame (s=0x16d23c0, pkt=0x0) at libavformat/mux.c:753
#3 0x0000000000412f5b in write_frame (s=0x16d23c0, pkt=0x7fffffffd4d0, ost=0x16e1340) at ffmpeg.c:599
#4 0x0000000000413a55 in do_subtitle_out (s=0x16d23c0, ost=0x16e1340, ist=0x16d1e90, sub=0x7fffffffd600) at ffmpeg.c:786
#5 0x0000000000417e7d in transcode_subtitles (ist=0x16d1e90, pkt=0x7fffffffd670, got_output=0x7fffffffd6cc) at ffmpeg.c:1771
#6 0x00000000004184a4 in output_packet (ist=0x16d1e90, pkt=0x7fffffffd860) at ffmpeg.c:1855
#7 0x000000000041ce99 in process_input (file_index=0) at ffmpeg.c:2988
#8 0x000000000041d1f3 in transcode_step () at ffmpeg.c:3084
#9 0x000000000041d300 in transcode () at ffmpeg.c:3136
#10 0x000000000041d7de in main (argc=8, argv=0x7fffffffddc8) at ffmpeg.c:3311
(gdb) disass $pc-32,$pc+32
Dump of assembler code from 0x4f73f8 to 0x4f7438:
0x00000000004f73f8 <ff_interleave_packet_per_dts+328>: or %cl,-0x75(%rax)
0x00000000004f73fb <ff_interleave_packet_per_dts+331>: rex.RB cwtl
0x00000000004f73fd <ff_interleave_packet_per_dts+333>: mov 0x30(%rax),%rax
0x00000000004f7401 <ff_interleave_packet_per_dts+337>: mov -0x24(%rbp),%edx
0x00000000004f7404 <ff_interleave_packet_per_dts+340>: movslq %edx,%rdx
0x00000000004f7407 <ff_interleave_packet_per_dts+343>: shl $0x3,%rdx
0x00000000004f740b <ff_interleave_packet_per_dts+347>: add %rdx,%rax
0x00000000004f740e <ff_interleave_packet_per_dts+350>: mov (%rax),%rax
0x00000000004f7411 <ff_interleave_packet_per_dts+353>: mov 0x130(%rax),%rax
=> 0x00000000004f7418 <ff_interleave_packet_per_dts+360>: mov 0x8(%rax),%rax
0x00000000004f741c <ff_interleave_packet_per_dts+364>: mov -0x50(%rbp),%rdx
0x00000000004f7420 <ff_interleave_packet_per_dts+368>: mov 0x38(%rcx),%rcx
0x00000000004f7424 <ff_interleave_packet_per_dts+372>: mov %rcx,%rsi
0x00000000004f7427 <ff_interleave_packet_per_dts+375>: mov %rax,%rdi
0x00000000004f742a <ff_interleave_packet_per_dts+378>: callq 0xc75a88 <av_rescale_q>
0x00000000004f742f <ff_interleave_packet_per_dts+383>: mov %rax,%rbx
0x00000000004f7432 <ff_interleave_packet_per_dts+386>: movl $0x1,-0x40(%rbp)
End of assembler dump.
(gdb) info register
rax 0x656d206e65646469 7308533428811752553
rbx 0x10f2af20 284340000
rcx 0x16e1d20 23993632
rdx 0x8 8
rsi 0xf4240 1000000
rdi 0x456b4 284340
rbp 0x7fffffffd1f0 0x7fffffffd1f0
rsp 0x7fffffffd170 0x7fffffffd170
r8 0x0 0
r9 0x0 0
r10 0x0 0
r11 0x246 582
r12 0x4054a0 4215968
r13 0x7fffffffddc0 140737488346560
r14 0x0 0
r15 0x0 0
rip 0x4f7418 0x4f7418 <ff_interleave_packet_per_dts+360>
eflags 0x10202 [ IF RF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
$ valgrind ffmpeg_g -i ticket2213.mkv -scodec mov_text -map 0 out.mp4
==4035== Memcheck, a memory error detector
==4035== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
==4035== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
==4035== Command: ffmpeg_g -i ticket2213.mkv -scodec mov_text -map 0 out.mp4
==4035==
ffmpeg version N-49452-g91f3592 Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 30 2013 10:43:05 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 17.100 / 52. 17.100
libavcodec 54. 91.100 / 54. 91.100
libavformat 54. 61.104 / 54. 61.104
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 34.101 / 3. 34.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
==4035== Invalid write of size 8
==4035== at 0x5096DD: ebml_parse_elem (matroskadec.c:890)
==4035== by 0x50999B: ebml_parse_elem (matroskadec.c:866)
==4035== by 0x50999B: ebml_parse_elem (matroskadec.c:866)
==4035== by 0x50A056: matroska_read_header (matroskadec.c:866)
==4035== by 0x5A18AF: avformat_open_input (utils.c:626)
==4035== by 0x451D20: open_input_file (ffmpeg_opt.c:767)
==4035== by 0x45062F: open_files.isra.6 (ffmpeg_opt.c:2283)
==4035== by 0x456068: ffmpeg_parse_options (ffmpeg_opt.c:2320)
==4035== by 0x44E557: main (ffmpeg.c:3289)
==4035== Address 0x66dcdac is 300 bytes inside a block of size 304 alloc'd
==4035== at 0x4C2ABED: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==4035== by 0x4C2AD6F: realloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==4035== by 0x5095B3: ebml_parse_elem (matroskadec.c:929)
==4035== by 0x50999B: ebml_parse_elem (matroskadec.c:866)
==4035== by 0x50999B: ebml_parse_elem (matroskadec.c:866)
==4035== by 0x50A056: matroska_read_header (matroskadec.c:866)
==4035== by 0x5A18AF: avformat_open_input (utils.c:626)
==4035== by 0x451D20: open_input_file (ffmpeg_opt.c:767)
==4035== by 0x45062F: open_files.isra.6 (ffmpeg_opt.c:2283)
==4035== by 0x456068: ffmpeg_parse_options (ffmpeg_opt.c:2320)
==4035== by 0x44E557: main (ffmpeg.c:3289)
==4035==
Input #0, matroska,webm, from 'ticket2213.mkv':
Metadata:
title : Mahou Shoujo Madoka Magika Episode 04 - Miracles and Magic Do Exist
ENCODER : Lavf54.61.104
Duration: 00:24:20.02, start: 0.000000, bitrate: 1 kb/s
Chapter #0.0: start 0.000000, end 113.155000
Metadata:
title : Prologue
Chapter #0.1: start 113.155000, end 203.120000
Metadata:
title : Opening
Chapter #0.2: start 203.120000, end 774.065000
Metadata:
title : Part A
Chapter #0.3: start 774.065000, end 1345.261000
Metadata:
title : Part B
Chapter #0.4: start 1345.261000, end 1435.100000
Metadata:
title : Ending
Chapter #0.5: start 1435.100000, end 1462.185000
Metadata:
title : Preview
Stream #0:0(eng): Subtitle: ssa (default)
Metadata:
title : Subtitle track
LANGUAGE : eng
Stream #0:1(eng): Subtitle: ssa
Metadata:
title : Subtitle track - Commentary
LANGUAGE : eng
Stream #0:2(eng): Subtitle: ssa
Metadata:
title : Subtitle track - Colorless
LANGUAGE : eng
Output #0, mp4, to 'out.mp4':
Metadata:
title : Mahou Shoujo Madoka Magika Episode 04 - Miracles and Magic Do Exist
encoder : Lavf54.61.104
Chapter #0.0: start 0.000000, end 113.155000
Metadata:
title : Prologue
Chapter #0.1: start 113.155000, end 203.120000
Metadata:
title : Opening
Chapter #0.2: start 203.120000, end 774.065000
Metadata:
title : Part A
Chapter #0.3: start 774.065000, end 1345.261000
Metadata:
title : Part B
Chapter #0.4: start 1345.261000, end 1435.100000
Metadata:
title : Ending
Chapter #0.5: start 1435.100000, end 1462.185000
Metadata:
title : Preview
Stream #0:0(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008) (default)
Metadata:
title : Subtitle track
LANGUAGE : eng
Stream #0:1(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008)
Metadata:
title : Subtitle track - Commentary
LANGUAGE : eng
Stream #0:2(eng): Subtitle: mov_text ([8][0][0][0] / 0x0008)
Metadata:
title : Subtitle track - Colorless
LANGUAGE : eng
Stream mapping:
Stream #0:0 -> #0:0 (ass -> mov_text)
Stream #0:1 -> #0:1 (ass -> mov_text)
Stream #0:2 -> #0:2 (ass -> mov_text)
Press [q] to stop, [?] for help
==4035== Invalid write of size 1
==4035== at 0xBB4503: av_strlcpy (avstring.c:86)
==4035== by 0x863A06: mov_text_text_cb (movtextenc.c:90)
==4035== by 0xAAA069: ff_ass_split_override_codes (ass_split.c:459)
==4035== by 0x8638B0: mov_text_encode_frame (movtextenc.c:125)
==4035== by 0x99A437: avcodec_encode_subtitle (utils.c:1493)
==4035== by 0x45D8E0: transcode_subtitles (ffmpeg.c:765)
==4035== by 0x45EC59: process_input (ffmpeg.c:1855)
==4035== by 0x44EB2F: main (ffmpeg.c:3084)
==4035== Address 0x670fdf0 is 0 bytes after a block of size 528 alloc'd
==4035== at 0x4C290FE: memalign (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==4035== by 0x4C291A7: posix_memalign (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==4035== by 0xBBEC31: av_mallocz (mem.c:92)
==4035== by 0x5A283E: avformat_new_stream (utils.c:3292)
==4035== by 0x450865: new_output_stream (ffmpeg_opt.c:904)
==4035== by 0x451184: new_subtitle_stream (ffmpeg_opt.c:1255)
==4035== by 0x455371: open_output_file (ffmpeg_opt.c:1596)
==4035== by 0x45062F: open_files.isra.6 (ffmpeg_opt.c:2283)
==4035== by 0x456091: ffmpeg_parse_options (ffmpeg_opt.c:2327)
==4035== by 0x44E557: main (ffmpeg.c:3289)
==4035==
==4035== Invalid write of size 1
==4035== at 0xBB4512: av_strlcpy (avstring.c:88)
==4035== by 0x863A06: mov_text_text_cb (movtextenc.c:90)
==4035== by 0xAAA069: ff_ass_split_override_codes (ass_split.c:459)
==4035== by 0x8638B0: mov_text_encode_frame (movtextenc.c:125)
==4035== by 0x99A437: avcodec_encode_subtitle (utils.c:1493)
==4035== by 0x45D8E0: transcode_subtitles (ffmpeg.c:765)
==4035== by 0x45EC59: process_input (ffmpeg.c:1855)
==4035== by 0x44EB2F: main (ffmpeg.c:3084)
==4035== Address 0x670fe3d is not stack'd, malloc'd or (recently) free'd
==4035==
==4035== Invalid write of size 1
==4035== at 0xBB4503: av_strlcpy (avstring.c:86)
==4035== by 0x863A06: mov_text_text_cb (movtextenc.c:90)
==4035== by 0xAA9FBD: ff_ass_split_override_codes (ass_split.c:381)
==4035== by 0x8638B0: mov_text_encode_frame (movtextenc.c:125)
==4035== by 0x99A437: avcodec_encode_subtitle (utils.c:1493)
==4035== by 0x45D8E0: transcode_subtitles (ffmpeg.c:765)
==4035== by 0x45EC59: process_input (ffmpeg.c:1855)
==4035== by 0x44EB2F: main (ffmpeg.c:3084)
==4035== Address 0x670fe3d is not stack'd, malloc'd or (recently) free'd
==4035==
==4035== Invalid read of size 8
==4035== at 0x53E895: ff_interleave_packet_per_dts (mux.c:646)
==4035== by 0x53EC4C: av_interleaved_write_frame (mux.c:725)
==4035== by 0x45A952: write_frame (ffmpeg.c:599)
==4035== by 0x45D97B: transcode_subtitles (ffmpeg.c:786)
==4035== by 0x45EC59: process_input (ffmpeg.c:1855)
==4035== by 0x44EB2F: main (ffmpeg.c:3084)
==4035== Address 0x81e3ab81e3a881eb is not stack'd, malloc'd or (recently) free'd
==4035==
==4035==
==4035== Process terminating with default action of signal 11 (SIGSEGV)
==4035== General Protection Fault
==4035== at 0x53E895: ff_interleave_packet_per_dts (mux.c:646)
==4035== by 0x53EC4C: av_interleaved_write_frame (mux.c:725)
==4035== by 0x45A952: write_frame (ffmpeg.c:599)
==4035== by 0x45D97B: transcode_subtitles (ffmpeg.c:786)
==4035== by 0x45EC59: process_input (ffmpeg.c:1855)
==4035== by 0x44EB2F: main (ffmpeg.c:3084)
==4035==
==4035== HEAP SUMMARY:
==4035== in use at exit: 3,335,029 bytes in 505 blocks
==4035== total heap usage: 8,558 allocs, 8,053 frees, 7,640,933 bytes allocated
==4035==
==4035== LEAK SUMMARY:
==4035== definitely lost: 16 bytes in 1 blocks
==4035== indirectly lost: 79 bytes in 5 blocks
==4035== possibly lost: 23,312 bytes in 1 blocks
==4035== still reachable: 3,311,622 bytes in 498 blocks
==4035== suppressed: 0 bytes in 0 blocks
==4035== Rerun with --leak-check=full to see details of leaked memory
==4035==
==4035== For counts of detected and suppressed errors, rerun with: -v
==4035== ERROR SUMMARY: 266 errors from 5 contexts (suppressed: 2 from 2)
Segmentation fault
comment:2 Changed 4 months ago by pk_hariprasad
Some debugging updates:
Segmentation fault happens when invoking the function av_rescale_q to calculate delta_dts with i = 1 and ff_interleave_packet_per_dts is called 479th time starting from 1
comment:3 Changed 4 months ago by michael
- Status changed from open to closed
- Resolution set to fixed
comment:4 Changed 4 months ago by julian
could you tell me the revision that fixed it?
thanks for fixing it!
comment:6 Changed 4 months ago by cehoyos
The sample currently also needs -fix_sub_duration so I will not delete it (at least for the moment).
comment:7 follow-up: ↓ 8 Changed 4 months ago by Cigaes
That is not true. Decoding from Matroska never requires -fix_sub_duration.
Complex ASS can not be converted to mov_text, that is not a bug, that is a limitation of the format.
-fix_sub_duration may make it seem to work, but it is only hiding the problems, not solving anything.
comment:8 in reply to: ↑ 7 ; follow-up: ↓ 9 Changed 4 months ago by cehoyos
I believe it is acceptable (and expected) that the conversion from ass to mov_text will damage some and drop other subtitles and that the resulting file does not show all effects that the original ass track encoded. Not acceptable imo is ffmpeg producing unusable output files without any warning. With -fix_sub_duration, the resulting file is watchable (with subtitles). I am neither claiming this is expected behaviour, nor that it works perfectly but it is nonetheless currently needed to produce a useful output file.
I'd like to keep the file so it is possible to test once the re-encoding without -fix_sub_duration is possible.
comment:9 in reply to: ↑ 8 ; follow-up: ↓ 10 Changed 4 months ago by Cigaes
Replying to cehoyos:
I believe it is acceptable (and expected)
I think you overestimate the users.
that the conversion from ass to mov_text will damage some and drop other subtitles and that the resulting file does not show all effects that the original ass track encoded.
That may be acceptable, but that is what happens when -fix_sub_durations is not used.
Not acceptable imo is ffmpeg producing unusable output files without any warning.
Under what circumstances do you get that?
With -fix_sub_duration, the resulting file is watchable (with subtitles).
Let me correct you: the parts of the resulting file that you looked at are watchable. Most of it will be, but the parts with overlapping subtitles will not.
I am neither claiming this is expected behaviour, nor that it works perfectly but it is nonetheless currently needed to produce a useful output file.
It is currently useful for ignoring errors, but that does not make the output file useful. Advocating its use will only let the users produce damaged files and delay a proper solution.
I'd like to keep the file
I am 100% in favor of keeping all files, but please stop suggesting using -fix_sub_duration in this circumstance, it is 100% wrong.
comment:10 in reply to: ↑ 9 Changed 4 months ago by cehoyos
comment:11 Changed 4 months ago by Cigaes
For #2212, it was an A-V desync, IIRC, was it not? If so, it was a bug in the MOV+mov_text muxer, nothing more.
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