[MPlayer-users] mencoder segfault in first-pass x264 dvdrip - nevermind

[Brandon Kuczenski]

My bad.  problem was upstream, in libmp3lame :P





On Tue, 11 Jan 2011, Brandon Kuczenski wrote:

> Hi all,
>
> I've been using mencoder (1.0-rc3) for dvd ripping for quite some time; after 
> a recent system upgrade I started getting segfaults apparently randomly 
> during the first pass of a two-pass encoding to x264.
>
> I upgraded to the latest svn code and the problem is still there.  It occurs 
> at a different location each time, but it does seem to happen every time (n=8 
> so far; two different DVDs).
>
> Should I report a bug?
>
> I would be grateful for any information from you folks.  Thanks for creating 
> and maintaining this impressive tool.
>
> supporting info:
>
> I recompiled with debugging symbols and ran in gdb as instructed here:
> http://www.mplayerhq.hu/DOCS/HTML/en/bugreports_what.html#bugreports_debug
> * note: GDB didn't like the command 'disass $pc-32 $pc+32' so I cut it.
>
> Anyway, I have a core dump but it's over 90 MB. I'm no gdb expert, but it 
> looks like the crash is happening in x264_lookahead_thread ()
>
> I placed my config.h, config.mak, and some gdb output (including the core-- 
> but beware, very slow upload bandwidth) here:
> http://ocean.301south.net/stuff/mencoder
>
> The mencoder command line was:
> /home/b/src/mplayer/mencoder dvd://1 -alang en -o title1.avi -oac mp3lame 
> -lameopts preset=160 -ovc x264 -x264encopts bitrate=720:pass=1:turbo=2 -ofps 
> 24000/1001 -vf crop=720:352:0:64,scale=512:-2
>
> Other information, as requested:
>
> b at poppy:mplayer$ uname -a
> Linux poppy 2.6.32-25-generic #45-Ubuntu SMP Sat Oct 16 19:52:42 UTC 2010 
> x86_64 GNU/Linux
> b at poppy:mplayer$ ls -l /lib/libc[.-]*
> -rwxr-xr-x 1 root root 1572232 2010-11-17 06:13 /lib/libc-2.11.1.so
> lrwxrwxrwx 1 root root      14 2011-01-11 00:40 /lib/libc.so.6 -> 
> libc-2.11.1.so
> b at poppy:mplayer$ gcc -v
> Using built-in specs.
> Target: x86_64-linux-gnu
> Configured with: ../src/configure -v --with-pkgversion='Ubuntu 
> 4.4.3-4ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs 
> --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared 
> --enable-multiarch --enable-linker-build-id --with-system-zlib 
> --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix 
> --with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 
> --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-plugin 
> --enable-objc-gc --disable-werror --with-arch-32=i486 --with-tune=generic 
> --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu 
> --target=x86_64-linux-gnu
> Thread model: posix
> gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5)
> b at poppy:mplayer$ ld -v
> GNU ld (GNU Binutils for Ubuntu) 2.20.1-system.20100303
> b at poppy:mplayer$ as --version
> GNU assembler (GNU Binutils for Ubuntu) 2.20.1-system.20100303
> Copyright 2009 Free Software Foundation, Inc.
> This program is free software; you may redistribute it under the terms of
> the GNU General Public License version 3 or later.
> This program has absolutely no warranty.
> This assembler was configured for a target of `x86_64-linux-gnu'.
> b at poppy:mplayer$
>
> Best regards,
> Brandon
>
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