[Ffmpeg-devel] Illegal instruction [PATCH]

[Michael Niedermayer]

Hi

On Wed, Mar 14, 2007 at 09:11:03PM +1100, John Dalgliesh wrote:
> On Wed, 14 Mar 2007, Alex2000deluxe at web.de wrote:
> >
> >NB7002:~/soft/ffmpeg-r8397 admin$ gdb ffmpeg_g
> >GNU gdb 6.3.50-20050815 (Apple version gdb-563) (Wed Jul 19 05:10:58 GMT 
> >2006)
> >Copyright 2004 Free Software Foundation, Inc.
> >GDB is free software, covered by the GNU General Public License, and you 
> >are
> >welcome to change it and/or distribute copies of it under certain 
> >conditions.
> >Type "show copying" to see the conditions.
> >There is absolutely no warranty for GDB.  Type "show warranty" for details.
> >This GDB was configured as "i386-apple-darwin"...Reading symbols for 
> >shared libraries ......... done
> >
> >(gdb) r -i test.avi -y -s pal -r pal -ac 2 -ar 48000 test.avi.dv
> >Starting program: /Users/admin/soft/ffmpeg-r8397/ffmpeg_g -i test.avi -y 
> >-s pal -r pal -ac 2 -ar 48000 test.avi.dv
> >Reading symbols for shared libraries .+++++++ done
> >FFmpeg version SVN-r8397, Copyright (c) 2000-2007 Fabrice Bellard, et al.
> > configuration: --prefix=/opt/local --disable-vhook 
> > --mandir=/opt/local/share/man --extra-cflags=-I/opt/local/include 
> > --extra-ldflags=-dynamic -L/opt/local/lib --disable-ffplay --enable-gpl 
> > --enable-libmp3lame --enable-libfaac --enable-libfaad --enable-x264 
> > --enable-pthreads --enable-shared
> > libavutil version: 49.3.0
> > libavcodec version: 51.38.0
> > libavformat version: 51.10.0
> > built on Mar 14 2007 10:48:38, gcc: 4.0.1 (Apple Computer, Inc. build 
> > 5363)
> >Input #0, avi, from 'test.avi':
> > Duration: 00:00:51.1, start: 0.000000, bitrate: 3726 kb/s
> > Stream #0.0: Video: h264, yuv420p, 720x576, 25.00 fps(r)
> > Stream #0.1: Audio: mp3, 48000 Hz, stereo, 192 kb/s
> >Output #0, dv, to 'test.avi.dv':
> > Stream #0.0: Video: dvvideo, yuv420p, 720x576, q=2-31, 200 kb/s, 25.00 
> > fps(c)
> > Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s
> >Stream mapping:
> > Stream #0.0 -> #0.0
> > Stream #0.1 -> #0.1
> >Press [q] to stop encoding
> >
> >Program received signal EXC_BAD_INSTRUCTION, Illegal instruction/operand.
> >0x011416df in ff_fdct_sse2 ()
> >(gdb) bt
> >#0  0x011416df in ff_fdct_sse2 ()
> >#1  0xbfffbe40 in ?? ()
> >Previous frame inner to this frame (corrupt stack?)
> >(gdb) disass $pc-32 $pc+32
> >Dump of assembler code from 0x11416bf to 0x11416ff:
> ...
> >0x011416df <ff_fdct_sse2+757>:  movdqa %xmm1,0(%ecx)
> ...
> >End of assembler dump.
> >
> >(gdb) info all-registers
> >eax            0x13f4d20        20925728
> >ecx            0xbfffe968       -1073747608
> 
> Oh, I think I've had this one too.
> 
> Never got around to submitting a patch because I wanted to explore it 
> further. (Why doesn't it happen on linux?)
> 
> Problem for me was insufficient alignment in DCT block. Patch attached.

looks ok, but iam not dv maintainer, roman?

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Why not whip the teacher when the pupil misbehaves? -- Diogenes of Sinope
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