Carl Eugen Hoyos <ceho...@rainbow.studorg.tuwien.ac.at> added the comment:
Backtrace has changed after r26392:
(gdb) r -i 4xm_crash.4xm -f null -
Starting program: ffmpeg_g -i 4xm_crash.4xm -f null -
[Thread debugging using libthread_db enabled]
FFmpeg version SVN-r26394, Copyright (c) 2000-2011 the FFmpeg developers
built on Jan 16 2011 19:53:30 with gcc 4.5.2
configuration: --cc='/usr/local/gcc-4.5.2/bin/gcc -m32'
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 1 / 0.16. 1
libavcodec 52.108. 0 / 52.108. 0
libavformat 52.93. 0 / 52.93. 0
libavdevice 52. 2. 3 / 52. 2. 3
libavfilter 1.74. 0 / 1.74. 0
libswscale 0.12. 0 / 0.12. 0
[4xm @ 0x8b8ccc0] Estimating duration from bitrate, this may be inaccurate
Input #0, 4xm, from '4xm_crash.4xm':
Duration: 00:00:14.00, start: 0.000000, bitrate: 664 kb/s
Stream #0.0: Video: 4xm, rgb565le, 648x480, 1 tbr, 1 tbn, 1 tbc
Stream #0.1: Audio: adpcm_4xm, 22050 Hz, 2 channels, s16, 705 kb/s
[buffer @ 0x8b93760] w:648 h:480 pixfmt:rgb565le
Output #0, null, to 'pipe:':
Metadata:
encoder : Lavf52.93.0
Stream #0.0: Video: rawvideo, rgb565le, 648x480, q=2-31, 200 kb/s, 90k tbn,
1 tbc
Stream #0.1: Audio: pcm_s16le, 22050 Hz, 2 channels, s16, 705 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Press [q] to stop encoding
Program received signal SIGSEGV, Segmentation fault.
mcdc (dc=0, scale=1, stride=648, h=2, log2w=<value optimized out>, src=<value
optimized out>, dst=<value optimized out>) at libavcodec/4xm.c:309
309 LE_CENTRIC_MUL(dst, src, scale, dc);
(gdb) disass $pc-32 $pc+32
Dump of assembler code from 0x842c850 to 0x842c890:
0x0842c850 <mcdc+178>: inc %esp
0x0842c851 <mcdc+179>: test %ebx,%ebx
0x0842c853 <mcdc+181>: jle 0x842c7c0 <decode_p_block+464>
0x0842c859 <mcdc+187>: mov 0x40(%esp),%ebp
0x0842c85d <mcdc+191>: xor %eax,%eax
0x0842c85f <mcdc+193>: xor %edx,%edx
0x0842c861 <mcdc+195>: mov 0x3c(%esp),%ebx
0x0842c865 <mcdc+199>: lea 0x0(%ebp,%ebp,1),%esi
0x0842c869 <mcdc+203>: mov 0x44(%esp),%ebp
0x0842c86d <mcdc+207>: lea 0x0(%esi),%esi
0x0842c870 <mcdc+210>: mov (%ecx,%eax,1),%edi
0x0842c873 <mcdc+213>: add $0x1,%edx
0x0842c876 <mcdc+216>: mov %edi,(%ebx,%eax,1)
0x0842c879 <mcdc+219>: mov 0x4(%ecx,%eax,1),%edi
0x0842c87d <mcdc+223>: mov %edi,0x4(%ebx,%eax,1)
0x0842c881 <mcdc+227>: mov 0x8(%ecx,%eax,1),%edi
0x0842c885 <mcdc+231>: mov %edi,0x8(%ebx,%eax,1)
0x0842c889 <mcdc+235>: mov 0xc(%ecx,%eax,1),%edi
0x0842c88d <mcdc+239>: mov %edi,0xc(%ebx,%eax,1)
End of assembler dump.
(gdb) info registers
eax 0x0 0
ecx 0x287c 10364
edx 0x0 0
ebx 0xd7a75020 -676900832
esp 0xffffb980 0xffffb980
ebp 0x2 0x2
esi 0x510 1296
edi 0x8b9f14d 146403661
eip 0x842c870 0x842c870 <mcdc+210>
eflags 0x210246 [ PF ZF IF RF ID ]
cs 0x23 35
ss 0x2b 43
ds 0x2b 43
es 0x2b 43
fs 0x0 0
gs 0x63 99
----------
topic: -avformat
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<https://roundup.ffmpeg.org/issue2527>
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