louis@louis-laptop:~$ file input.avi
input.avi: RIFF (little-endian) data, AVI, 720 x 576, 25.00 fps, video: XviD, audio: MPEG-1 Layer 3 (stereo, 48000 Hz)

louis@louis-laptop:~$ du input.avi
216500	input.avi

louis@louis-laptop:~$ file output.avi 
output.avi: RIFF (little-endian) data, AVI, 720 x 576, 25.00 fps, video: FFMpeg MPEG-4, audio: MPEG-1 Layer 3 (stereo, 48000 Hz)

louis@louis-laptop:~$ du output.avi 
157252	output.avi

louis@louis-laptop:~$ cat /etc/issue
Ubuntu oneiric (development branch) \n \l (11.10)

louis@louis-laptop:~$ uname -a
Linux louis-laptop 3.0.0-11-generic #18-Ubuntu SMP Tue Sep 13 23:38:01 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

louis@louis-laptop:~$ mencoder
MEncoder SVN-r33713-4.6.1 (C) 2000-2011 MPlayer Team
--version is not an MEncoder option


louis@louis-laptop:~$ dpkg -l | grep libc6 | head -n1
ii  libc6                                                       2.13-20ubuntu2                             Embedded GNU C Library: Shared libraries

louis@louis-laptop:~$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6.1/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.1-9ubuntu3' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --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 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)

louis@louis-laptop:~$ ld -v
GNU ld (GNU Binutils for Ubuntu) 2.21.53.20110810

louis@louis-laptop:~$ as --version
GNU assembler (GNU Binutils for Ubuntu) 2.21.53.20110810
Copyright 2011 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 louis@louis-laptop:~$ cat /proc/cpuinfo 
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Duo CPU     T9300  @ 2.50GHz
stepping	: 6
cpu MHz		: 2501.000
cache size	: 6144 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm ida dts tpr_shadow vnmi flexpriority
bogomips	: 4988.12
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Duo CPU     T9300  @ 2.50GHz
stepping	: 6
cpu MHz		: 800.000
cache size	: 6144 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
apicid		: 1
initial apicid	: 1
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm ida dts tpr_shadow vnmi flexpriority
bogomips	: 4987.46
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

configured for a target of `x86_64-linux-gnu'.