audacity crashed with SIGSEGV when setting ffmpeg library

StacktraceTop:float_to_int16_interleave_sse2 (dst=0xa823168,
aac_decode_frame (avccontext=0xa67e0f0, data=0xa822168,
avcodec_decode_audio2 (avctx=0xa67e0f0, samples=0xa822168,
FFmpegImportFileHandle::DecodeFrame (this=0xa2bf420, sc=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.

Can you reproduce this with the 'ffplay' binary?
can you please attach the aac file in question?
does the crash go away if you move /usr/lib/i686/cmov/libavcodec.so.52 out of the way?

With FFplay, it plays for about a second or two, and then freezes. It cannot be killed with C-c. FFmpeg was able to transcode it to an ogg vorbis file, which Audacity was able to open without any trouble. Here is the output of playing the file with "ffplay -stats"

FFplay version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2003-2009 Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --extra-cflags=-I/build/buildd/ffmpeg-0.5+svn20090706/debian/include --enable-shared --disable-static
  libavutil 49.15. 0 / 49.15. 0
  libavcodec 52.20. 0 / 52.20. 0
  libavformat 52.31. 0 / 52.31. 0
  libavdevice 52. 1. 0 / 52. 1. 0
  libavfilter 0. 4. 0 / 0. 4. 0
  libswscale 0. 7. 1 / 0. 7. 1
  libpostproc 51. 2. 0 / 51. 2. 0
  built on Oct 13 2009 22:15:16, gcc: 4.4.1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Music/Ballroom/03 Stand By Me.m4a':
  Duration: 00:04:09.73, start: 0.000000, bitrate: 129 kb/s
    Stream #0.0(und): Audio: aac, 44100 Hz, stereo, s16
title: Stand By Me
author: Maurice White
album: Maurice White
genre: R&B/Soul
track: 0
year: 2001
comment: USSM18500473
muxer: iTunes v7.1.1.5, QuickTime 7.1.5
   0.21 A-V: 0.000 aq= 80KB vq= 0KB sq= 0B

hm I'm confused.

I've been able to get a crash with ffprobe (cf. bug #453992), but not with ffplay. With ffplay, the song is just played OK.

OTOH, audacity didn't open it with a very confused error message "detected file format but cannot import it".

I've spend some time now in gdb about this, but I don't really get it. the crash occurs in parts of hand written assebler, the mmx version of dsputils.c.

needs investigation upstream, though many changes happened upstream in aac.c

valid upstream issue, needs forwarding

This bug was fixed in the package ffmpeg - 4:0.6~svn20100505-1ubuntu1

---------------
ffmpeg (4:0.6~svn20100505-1ubuntu1) maverick; urgency=low

  * merge from debian/experimental. remaining changes:
    - don't disable encoders
    - don't build against libfaad, libdirac and libopenjpeg (all in universe)

ffmpeg (4:0.6~svn20100505-1) experimental; urgency=low

  * update to new upstream. Closes: #569727
    - fixes various segfaults and other minor feature improvements
      Closes: #374931, #522449, #501891, #559712, #420231, #369127, #538082,
              #298095, #294422, #561553, #525385, #495274, #420230
      LP: #305286, #457106, #529200, #301723, #305315, #336479, #420230,
          #412063, #428912, #432181, #440591, #453732, #453732, #453732,
      #514259, #515243, #521472, #530186, #530186, #197842, #483317,
     #483317, #539407, #280098, #331255, #566107, #569823, #570305,
     #573190
  * Fixup lintian overrides for new upstream snapshot
  * Bump Standards-Version to 3.8.4
  * Many upstream changes, see upstream Changelog for details
 -- Reinhard Tartler <email address hidden> Wed, 26 May 2010 00:01:17 +0200

This bug was not fixed in the above package. Running 10.04 Lucid and am currently experiencing this exact problem.

Figures. I turn on apport and wouldn't you know it, audacity and ffprobe stop crashing.

And it's crashing again. I was able to get one m4a song to import, make the changes I needed to, and exported to .wav.

As noted (in e-mail privately), the fixed package is in _maverick_ not lucid.

Audacity doesn't load the libavformat library that comes with the Maverick ffmpeg packages. I'm able to locate it, but when I click Ok, the library version is still listed as FFmpeg library not found.

My laptop is more or less a production machines and I don't feel comfortable running Maverick on it while it's still in beta.