[Ffmpeg-devel] Segfault and Backtrace
Eric "ManxPower" Wieling
eric
Sat Jan 21 00:30:05 CET 2006
[root at fs-1 eric]# gdb ffmpeg/ffmpeg_g
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This GDB was configured as "i586-mandrake-linux-gnu"...
(gdb) -i /home/eric/bob.VOB -b 2000 -f mpeg2video -s 720x480 -r 29.97
/home/eric/video.m2v -f mp2 -ab 192 -ar 32000 /home/eric/audio.m2a
Undefined command: "-i". Try "help".
(gdb) r -i /home/eric/bob.VOB -b 2000 -f mpeg2video -s 720x480 -r
29.97 /home/eric/video.m2v -f mp2 -ab 192 -ar 32000 /home/eric/audio.m2a
Starting program: /home/eric/ffmpeg/ffmpeg_g -i /home/eric/bob.VOB -b
2000 -f mpeg2video -s 720x480 -r 29.97 /home/eric/video.m2v -f mp2 -ab
192 -ar 32000 /home/eric/audio.m2a
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
configuration: --enable-a52bin --enable-gpl --disable-strip
libavcodec version: 51.1.0
libavformat version: 50.0.0
built on Jan 20 2006 17:15:15, gcc: 3.3.1 (Mandrake Linux 9.2 3.3.1-2mdk)
Input #0, mpeg, from '/home/eric/bob.VOB':
Duration: 00:34:57.9, start: 0.293422, bitrate: 3812 kb/s
Stream #0.0[0x1e0], 29.97 fps(r): Video: mpeg2video, yuv420p,
720x480, 3500 kb/s
Stream #0.1[0x80]: Audio: 0x0000
Output #0, mpeg2video, to '/home/eric/video.m2v':
Stream #0.0, 29.97 fps(c): Video: mpeg2video, yuv420p, 720x480,
q=2-31, 2000 kb/s
Output #1, mp2, to '/home/eric/audio.m2a':
Stream #1.0: Audio: mp2, 32000 Hz, 0 channels, 192 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #1.0
Program received signal SIGFPE, Arithmetic exception.
0x081c99ef in l2_select_table (bitrate=0, nb_channels=0, freq=32000,
lsf=0) at mpegaudiodec.c:1309
1309 ch_bitrate = bitrate / nb_channels;
(gdb) bt
#0 0x081c99ef in l2_select_table (bitrate=0, nb_channels=0, freq=32000,
lsf=0) at mpegaudiodec.c:1309
#1 0x080cf1ab in MPA_encode_init (avctx=0x84b0480) at mpegaudio.c:116
#2 0x080b3a0c in avcodec_open (avctx=0x84b0480, codec=0x0) at utils.c:866
#3 0x08059672 in main (argc=139135232, argv=0xbffff8b4) at ffmpeg.c:1867
#4 0x40067c57 in __libc_start_main () from /lib/i686/libc.so.6
(gdb) disass $pc-32 $pc+32
Dump of assembler code from 0x81c99cf to 0x81c9a0f:
0x81c99cf <mpa_decode_header+239>: dec %esp
0x81c99d0 <mpa_decode_header+240>: addb $0x0,(%eax,%eax,1)
0x81c99d4 <mpa_decode_header+244>: jmp 0x81c9990
<mpa_decode_header+176>
0x81c99d6 <mpa_decode_header+246>: movl $0x180,0x4c(%edi)
0x81c99dd <mpa_decode_header+253>: jmp 0x81c9990
<mpa_decode_header+176>
0x81c99df <mpa_decode_header+255>: nop
0x81c99e0 <l2_select_table>: push %ebp
0x81c99e1 <l2_select_table+1>: mov %esp,%ebp
0x81c99e3 <l2_select_table+3>: push %ebx
0x81c99e4 <l2_select_table+4>: mov 0x8(%ebp),%edx
0x81c99e7 <l2_select_table+7>: mov 0x10(%ebp),%ebx
0x81c99ea <l2_select_table+10>: mov %edx,%eax
0x81c99ec <l2_select_table+12>: sar $0x1f,%edx
0x81c99ef <l2_select_table+15>: idivl 0xc(%ebp)
0x81c99f2 <l2_select_table+18>: mov %eax,%ecx
0x81c99f4 <l2_select_table+20>: mov $0x4,%edx
0x81c99f9 <l2_select_table+25>: mov 0x14(%ebp),%eax
0x81c99fc <l2_select_table+28>: test %eax,%eax
0x81c99fe <l2_select_table+30>: jne 0x81c9a56 <l2_select_table+118>
0x81c9a00 <l2_select_table+32>: cmp $0xbb80,%ebx
0x81c9a06 <l2_select_table+38>: sete %dl
0x81c9a09 <l2_select_table+41>: cmp $0x37,%ecx
0x81c9a0c <l2_select_table+44>: setg %al
End of assembler dump.
(gdb) info all-registers
eax 0xc0 192
ecx 0x0 0
edx 0x0 0
ebx 0x7d00 32000
esp 0xbffff154 0xbffff154
ebp 0xbffff158 0xbffff158
esi 0xc0 192
edi 0x1b00 6912
eip 0x81c99ef 0x81c99ef
eflags 0x10246 66118
cs 0x23 35
ss 0x2b 43
ds 0x2b 43
es 0x2b 43
fs 0x0 0
gs 0x0 0
st0 -nan(0x8181818181818181) (raw 0xffff8181818181818181)
st1 -nan(0x81008100810081) (raw 0xffff0081008100810081)
st2 -nan(0x8181818181818181) (raw 0xffff8181818181818181)
st3 -nan(0x81008100810081) (raw 0xffff0081008100810081)
st4 inf (raw 0x7fff8000000000000000)
st5 590 (raw 0x40089380000000000000)
st6 864 (raw 0x4008d800000000000000)
st7 0 (raw 0x00000000000000000000)
fctrl 0x37f 895
fstat 0x4024 16420
ftag 0xffff 65535
fiseg 0x23 35
fioff 0x80cf199 135066009
foseg 0x2b 43
fooff 0x84f1a6c 139401836
fop 0x589 1417
xmm0 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
xmm1 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
xmm2 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
xmm3 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
xmm4 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
xmm5 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
xmm6 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
xmm7 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0},
uint128 = 0x00000000000000000000000000000000}
mxcsr 0x1f80 8064
orig_eax 0xffffffff -1
mm0 {uint64 = 0x8181818181818181, v2_int32 = {0x81818181,
0x81818181}, v4_int16 = {0x8181, 0x8181, 0x8181, 0x8181}, v8_int8 =
{0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81}}
mm1 {uint64 = 0x81008100810081, v2_int32 = {0x810081,
0x810081}, v4_int16 = {0x81, 0x81, 0x81, 0x81}, v8_int8 = {0x81, 0x0,
0x81, 0x0, 0x81, 0x0,
0x81, 0x0}}
mm2 {uint64 = 0x8181818181818181, v2_int32 = {0x81818181,
0x81818181}, v4_int16 = {0x8181, 0x8181, 0x8181, 0x8181}, v8_int8 =
{0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81}}
mm3 {uint64 = 0x81008100810081, v2_int32 = {0x810081,
0x810081}, v4_int16 = {0x81, 0x81, 0x81, 0x81}, v8_int8 = {0x81, 0x0,
0x81, 0x0, 0x81, 0x0,
0x81, 0x0}}
mm4 {uint64 = 0x8000000000000000, v2_int32 = {0x0,
0x80000000}, v4_int16 = {0x0, 0x0, 0x0, 0x8000}, v8_int8 = {0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0,
0x80}}
---Type <return> to continue, or q <return> to quit---
mm5 {uint64 = 0x9380000000000000, v2_int32 = {0x0,
0x93800000}, v4_int16 = {0x0, 0x0, 0x0, 0x9380}, v8_int8 = {0x0, 0x0,
0x0, 0x0, 0x0, 0x0,
0x80, 0x93}}
mm6 {uint64 = 0xd800000000000000, v2_int32 = {0x0,
0xd8000000}, v4_int16 = {0x0, 0x0, 0x0, 0xd800}, v8_int8 = {0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0,
0xd8}}
mm7 {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0,
0x0, 0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
(gdb)
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