[FFmpeg-trac] #1602(undetermined:new): h263 crash with lowres

FFmpeg trac at avcodec.org
Fri Aug 3 18:37:21 CEST 2012


#1602: h263 crash with lowres
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 the sample from ticket #742 seems to crash ffmpeg when lowres is enabled

 http://ffmpeg.org/trac/ffmpeg/raw-
 attachment/ticket/742/M3_E3TrailerMC56k7fps.mov

 {{{
 (gdb) r -vlowres 1 -i M3_E3TrailerMC56k7fps.mov -f null -
 Starting program: d:\mingw\msys\1.0\ffmpeg\ffmpeg_g.exe -vlowres 1 -i
 M3_E3Trail
 erMC56k7fps.mov -f null -
 [New Thread 276.0x56c]
 ffmpeg version 0.10.2.git Copyright (c) 2000-2012 the FFmpeg developers
   built on Jun 28 2012 19:36:59 with gcc 4.6.1
   configuration: --disable-ffprobe --disable-ffplay --disable-asm
   libavutil      51. 63.100 / 51. 63.100
   libavcodec     54. 29.101 / 54. 29.101
   libavformat    54. 11.100 / 54. 11.100
   libavdevice    54.  0.100 / 54.  0.100
   libavfilter     3.  0.100 /  3.  0.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
 [h263 @ 03b32028] illegal ac vlc code at 3x0
 [h263 @ 03b32028] Error at MB: 3

 Program received signal SIGSEGV, Segmentation fault.
 0x7c910a19 in wcsncpy () from C:\WINDOWS\system32\ntdll.dll
 (gdb) bt
 #0  0x7c910a19 in wcsncpy () from C:\WINDOWS\system32\ntdll.dll
 #1  0x7c91a2b6 in ntdll!RtlpUnWaitCriticalSection ()
    from C:\WINDOWS\system32\ntdll.dll
 #2  0x7c970552 in ntdll!RtlpNtMakeTemporaryKey ()
    from C:\WINDOWS\system32\ntdll.dll
 #3  0x7c94bafc in ntdll!LdrFindEntryForAddress ()
    from C:\WINDOWS\system32\ntdll.dll
 #4  0x03a30000 in ?? ()
 #5  0x7c91a1ba in ntdll!RtlpUnWaitCriticalSection ()
    from C:\WINDOWS\system32\ntdll.dll
 #6  0x77c1c2de in msvcrt!free () from C:\WINDOWS\system32\msvcrt.dll
 #7  0x03a30000 in ?? ()
 #8  0x00a178a6 in av_free (ptr=<optimized out>) at libavutil/mem.c:180
 #9  av_freep (arg=0x3b5a170) at libavutil/mem.c:187
 #10 0x005c7593 in free_picture (pic=0x3b59fd8, s=0x3b15b48)
     at libavcodec/mpegvideo.c:395
 #11 ff_MPV_common_end (s=0x3b15b48) at libavcodec/mpegvideo.c:942
 #12 0x00a5f6b6 in ff_h263_decode_end (avctx=0x3b32028)
     at libavcodec/h263dec.c:127
 #13 0x00a44478 in avcodec_close (avctx=0x3b32028) at
 libavcodec/utils.c:1683
 #14 0x00449401 in avformat_find_stream_info (ic=0x3a3d3f0,
 options=0x3a3df98)
     at libavformat/utils.c:2703
 #15 0x0040e963 in opt_input_file (o=0x22fdc8, opt=0x3a327ae "i",
     filename=<optimized out>) at ffmpeg.c:4340
 #16 0x004133b3 in parse_option (optctx=0x22fdc8, opt=<optimized out>,
     arg=0x3a327b0 "M3_E3TrailerMC56k7fps.mov", options=0xa9cd60)
     at cmdutils.c:311
 #17 0x00413616 in parse_options (optctx=0x22fdc8, argc=8,
     argv=<optimized out>, options=0xa9cd60,
     parse_arg_function=0x40ff70 <opt_output_file>) at cmdutils.c:344
 #18 0x00a3b859 in main (argc=8, argv=0x3a32858) at ffmpeg.c:5914
 (gdb)
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1602>
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