mencoder crashes when trying to transcode realmedia stream dump

[Ryan Kavanagh]

Binary package hint: mplayer

mencoder crashes when I try to transcode a realmedia stream dump. It was dumped with:

mplayer -dumpstream rtsp://realcluster.forethought.net:554/ari/registeredonly/physics_harriman_20031014.rm\?cloakport=8080

I then tried to transcode with:
mencoder stream2.dump -oac pcm -ovc copy -o stream2.avi

mencoder stream2.dump -oac pcm -ovc copy -o stream2.mpeg

mencoder stream2.dump -oac mp3lame -lameopts preset=128 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1200 -ofps 25 -of avi -o out.avi

mencoder stream.dump -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac mp3lame -lameopts vbr=3 -o a.avi -ffourcc DX50 && mencoder stream.dump -ovc lavc -lavcopts vcodec=mpeg4:vpass=2 -oac mp3lame -lameopts vbr=3 -o a.avi -ffourcc DX50

and so on, always getting the same output:
27037 Videos % mencoder stream.dump -ovc lavc -lavcopts \ 2010-01-05 22:30:07 ryan pts/8
vcodec=mpeg4:vpass=1 -oac mp3lame -lameopts vbr=3 -o \
a.avi -ffourcc DX50

MEncoder SVN-r29237-4.4.1 (C) 2000-2009 MPlayer Team
success: format: 0 data: 0x0 - 0x1c23cd8
REAL file format detected.
Stream description: Audio Stream
Stream mimetype: audio/x-pn-realaudio
[real] Audio stream found, -aid 0
Stream description: Video Stream
Stream mimetype: video/x-pn-realvideo
[real] Video stream found, -vid 1
VIDEO: [RV40] 320x240 24bpp 15.000 fps 0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:11 fourcc:0x30345652 size:320x240 fps:15.000 ftime:=0.0667
==========================================================================
Opening audio decoder: [realaud] RealAudio decoder
Error: /usr/lib/codecs/sipr.so.6.0: cannot open shared object file: No such file or directory
Win32 LoadLibrary failed to load: sipr.so.6.0, /usr/lib/codecs/sipr.so.6.0, /usr/lib/win32/sipr.so.6.0, /usr/local/lib/win32/sipr.so.6.0
Error loading dll
ERROR: Could not open required DirectShow codec sipr.so.6.0.
Read the RealAudio section of the DOCS!
ADecoder preinit failed :(
ADecoder init failed :(
Opening audio decoder: [realaud] RealAudio decoder
Error: /usr/lib/codecs/sipr.so: cannot open shared object file: No such file or directory
Win32 LoadLibrary failed to load: sipr.so, /usr/lib/codecs/sipr.so, /usr/lib/win32/sipr.so, /usr/local/lib/win32/sipr.so
Error loading dll
ERROR: Could not open required DirectShow codec sipr.so.
Read the RealAudio section of the DOCS!
ADecoder preinit failed :(
ADecoder init failed :(
Opening audio decoder: [realaud] RealAudio decoder
Win32 LoadLibrary failed to load: sipr.dll, /usr/lib/codecs/sipr.dll, /usr/lib/win32/sipr.dll, /usr/local/lib/win32/sipr.dll
Error loading dll
ERROR: Could not open required DirectShow codec sipr.dll.
Read the RealAudio section of the DOCS!
ADecoder preinit failed :(
ADecoder init failed :(
Opening audio decoder: [realaud] RealAudio decoder
Win32 LoadLibrary failed to load: sipr3260.dll, /usr/lib/codecs/sipr3260.dll, /usr/lib/win32/sipr3260.dll, /usr/local/lib/win32/sipr3260.dll
Error loading dll
ERROR: Could not open required DirectShow codec sipr3260.dll.
Read the RealAudio section of the DOCS!
ADecoder preinit failed :(
ADecoder init failed :(
Opening audio decoder: [realaud] RealAudio decoder
Error: /usr/lib/codecs/sipr.bundle/Contents/MacOS/sipr: cannot open shared object file: No such file or directory
Win32 LoadLibrary failed to load: sipr.bundle/Contents/MacOS/sipr, /usr/lib/codecs/sipr.bundle/Contents/MacOS/sipr, /usr/lib/win32/sipr.bundle/Contents/MacOS/sipr, /usr/local/lib/win32/sipr.bundle/Contents/MacOS/sipr
Error loading dll
ERROR: Could not open required DirectShow codec sipr.bundle/Contents/MacOS/sipr.
Read the RealAudio section of the DOCS!
ADecoder preinit failed :(
ADecoder init failed :(
Cannot find codec for audio format 0x72706973.
Read DOCS/HTML/en/codecs.html!
==========================================================================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
==========================================================================
Opening video decoder: [realvid] RealVideo decoder
Win32 LoadLibrary failed to load: drvc.dll, /usr/lib/codecs/drvc.dll, /usr/lib/win32/drvc.dll, /usr/local/lib/win32/drvc.dll
Error loading dll
ERROR: Could not open required DirectShow codec drvc.dll.
Read the RealVideo section of the DOCS!
VDecoder init failed :(
Opening video decoder: [realvid] RealVideo decoder
Win32 LoadLibrary failed to load: drv43260.dll, /usr/lib/codecs/drv43260.dll, /usr/lib/win32/drv43260.dll, /usr/local/lib/win32/drv43260.dll
Error loading dll
ERROR: Could not open required DirectShow codec drv43260.dll.
Read the RealVideo section of the DOCS!
VDecoder init failed :(
Opening video decoder: [realvid] RealVideo decoder
Error: /usr/lib/codecs/drvc.bundle/Contents/MacOS/drvc: cannot open shared object file: No such file or directory
Win32 LoadLibrary failed to load: drvc.bundle/Contents/MacOS/drvc, /usr/lib/codecs/drvc.bundle/Contents/MacOS/drvc, /usr/lib/win32/drvc.bundle/Contents/MacOS/drvc, /usr/local/lib/win32/drvc.bundle/Contents/MacOS/drvc
Error loading dll
ERROR: Could not open required DirectShow codec drvc.bundle/Contents/MacOS/drvc.
Read the RealVideo section of the DOCS!
VDecoder init failed :(
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffrv40] vfm: ffmpeg (FFmpeg RV40)
==========================================================================
Forcing output FourCC to 30355844 [DX50].
VDec: vo config request - 320 x 240 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
videocodec: libavcodec (320x240 fourcc=30355844 [DX50])
Writing header...1f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0]
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
[1] 17297 segmentation fault mencoder stream.dump -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac mp3lame

I can play stream.dump using mplayer.

Please see the attached backtrace. I'm using an up to date Karmic system. The mencoder version is:
 ii mencoder 2:1.0~rc3+svn20090426-1ubuntu10.1 MPlayer's Movie Encoder

ProblemType: Bug
Architecture: i386
Date: Tue Jan 5 22:24:42 2010
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: mencoder 2:1.0~rc3+svn20090426-1ubuntu10.1
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=en_CA.UTF-8
 SHELL=/bin/zsh
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
RelatedPackageVersions:
 libavcodec52 4:0.5+svn20090706-2ubuntu2
 libavcodec-extra-52 N/A
SourcePackage: mplayer
Uname: Linux 2.6.31-16-generic i686
UserConf: # Write your default config options here!
XsessionErrors: (polkit-gnome-authentication-agent-1:6822): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
system: distro = Ubuntu, architecture = i686, kernel = 2.6.31-16-generic