[FFmpeg-trac] #1208(avcodec:new): EBP Modification

[FFmpeg]

#1208: EBP Modification
-------------------------------------+-----------------------------------
             Reporter:  daybreak     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  critical     |                Component:  avcodec
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-----------------------------------

Comment (by ami_stuff):

 crashes here with:

 {{{
 (gdb) r -i 702121h264-TTA.mkvtest82.mkv -an -vn out.mkv
 Starting program: d:\mingw\msys\1.0\ffmpeg-head-23fba3e\ffmpeg_g.exe -i
 702121h2
 64-TTA.mkvtest82.mkv -an -vn out.mkv
 [New Thread 2872.0xb3c]
 ffmpeg version 0.10.2.git-23fba3e Copyright (c) 2000-2012 the FFmpeg
 developers
   built on May  5 2012 19:57:06 with gcc 4.6.1
   configuration: --disable-ffprobe --enable-gpl
   libavutil      51. 49.100 / 51. 49.100
   libavcodec     54. 19.100 / 54. 19.100
   libavformat    54.  4.100 / 54.  4.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 72.104 /  2. 72.104
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 11.100 /  0. 11.100
   libpostproc    52.  0.100 / 52.  0.100
 [tta @ 040a6d60] CRC error
 [tta @ 040a6d60] Seek table missing or too small
 [h264 @ 03b3cc00] concealing 846 DC, 846 AC, 846 MV errors
 [h264 @ 03b3cc00] concealing 186 DC, 186 AC, 186 MV errors
 [h264 @ 03b3cc00] concealing 459 DC, 459 AC, 459 MV errors
 Input #0, matroska,webm, from '702121h264-TTA.mkvtest82.mkv':
   Metadata:
     creation_time   : 2006-12-23 15:47:16
   Duration: 00:24:10.95, start: 0.000000, bitrate: 17 kb/s
     Stream #0:0: Video: h264 (High), yuv420p, 848x480, SAR 1:1 DAR 53:30,
 23.98
 fps, 23.98 tbr, 1k tbn, 59.94 tbc (default)
     Stream #0:1: Audio: tta, 48000 Hz, stereo, s16 (default)
     Stream #0:2: Subtitle: ssa (default)
     Stream #0:3: Subtitle: ssa
 File 'out.mkv' already exists. Overwrite ? [y/N] y
 strptime() unavailable on this system, cannot convert the date string.
 Output #0, matroska, to 'out.mkv':
   Metadata:
     creation_time   : 2006-12-23 15:47:16
     encoder         : Lavf54.4.100
     Stream #0:0: Subtitle: ssa (default)
 Stream mapping:
   Stream #0:2 -> #0:0 (ass -> ass)
 Press [q] to stop, [?] for help

 Program received signal SIGSEGV, Segmentation fault.
 free_section (ctx=0x0, section=0xcb7450) at libavcodec/ass_split.c:314
 314             ptr   = *(void **)ptr;
 (gdb) bt
 #0  free_section (ctx=0x0, section=0xcb7450) at libavcodec/ass_split.c:314
 #1  0x009fd5cf in ff_ass_split_dialog (ctx=0x0,
     buf=0x3b4a120 "Dialogue:
 0,0:00:02.07,0:00:03.27,OP-00,NTP,0000,0000,0000,,Ń
 \203č{\\fe134\\fnÚ╗Ĺń\275ô}┬Ě{\\r}Ń\203č{\\fe134\\fnÚ╗Ĺń\275ô}┬Ě{\\r}Ń\203čŃ\203
 ęŃé»Ń\203źÔ\230ć\r\nDialogue:
 0,0:00:02.07,0:00:03.27,OPńŞşŠľç-00,NTP,0000,0000,
 0000,,ň«×{\\"..., cache=0, number=0x0) at libavcodec/ass_split.c:340
 #2  0x008a9715 in ass_decode_frame (avctx=0x40acc60, data=0x22e8d0,
     got_sub_ptr=0x22e910, avpkt=0x22e800) at libavcodec/assdec.c:45
 #3  0x00537266 in avcodec_decode_subtitle2 (avctx=0x40acc60, sub=0x22e8d0,
     got_sub_ptr=0x22e910, avpkt=0x22e800) at libavcodec/utils.c:1584
 #4  0x00407dfd in transcode_subtitles (got_output=<optimized out>,
     pkt=<optimized out>, ist=<optimized out>) at ffmpeg.c:2677
 #5  output_packet (ist=0x3b47960, pkt=0x22fbf0) at ffmpeg.c:2779
 #6  0x0040ddd5 in transcode () at ffmpeg.c:3652
 #7  0x00af9232 in main (argc=6, argv=0x3b40db0) at ffmpeg.c:5899
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1208#comment:6>
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