I want to publish this contribute because there is a big confusion on-line to understand how to convert source video file from a few cellulars ( example Nokia 6300 - LG 8300) using the best one and the most used in all software for video/audio conversion ......

FFMPEG

if you try to convert these 3gp video files (with amr audio codec) with a general ffmpeg repository installation, it give you an error like this:

Unsupported codec (id=73728) for input stream #0.1

The reasons of this error is because the ffmpeg rpm installation don't preview the amr encode and decode audio codec in the compilation.

So to compile in the right way ffmpeg it necessary to add these options in the svn configure command line, but this encode and decode libraries must be installed in a devel package format:

--enable-libamr-nb --enable-libamr-wb

This document is also for the right compiling method in a CentOS 5.x distribuitions and in a 64 bit platform.

At the first you must add this repository:

rpm -Uhv http://apt.sw.be/redhat/el5/en/x86_64/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.x86_64.rpm

Then you need to update all packages list

yum -y update

Now install all necessaries packages:

yum install SDL-devel a52dec a52dec-devel alsa-lib-devel faac faac-devel faad2 faad2-devel

yum install freetype-devel giflib gsm gsm-devel imlib2 imlib2-devel lame lame-devel libICE-devel libSM-devel libX11-devel

yum install libXau-devel libXdmcp-devel libXext-devel libXrandr-devel libXrender-devel libXt-devel

yum install libid3tag libogg-devel libvorbis-devel mesa-libGL-devel mesa-libGLU-devel xorg-x11-proto-devel xvidcore xvidcore-devel zlib-devel

These is the amr libraries:

yum install amrnb-devel amrwb-devel

yum install libtheora libtheora-devel

yum install glibc gcc gcc-c++ autoconf automake libtool

yum install subversion

yum install ncurses-devel

yum install libdc1394 libdc1394-devel

Now we need to get the x264 best video codec

wget ftp://ftp.videolan.org/pub/videolan/x264/snapshots/x264-snapshot-20081108-2245.tar.bz2

bunzip2 < x264-snapshot-20081108-2245.tar.bz2 | tar -xf -

And all the essential codecs

wget http://www3.mplayerhq.hu/MPlayer/releases/codecs/essential-20061022.tar.bz2

bunzip2 essential-20061022.tar.bz2; tar xvf essential-20061022.tar

yum install yasm nasm

mkdir /usr/local/lib/codecs/

mkdir /usr/local/lib64/codecs/

cp essential-20061022/* /usr/local/lib/codecs/

cp essential-20061022/* /usr/local/lib64/codecs/

chmod -R 755 /usr/local/lib/codecs/

chmod -R 755 /usr/local/lib64/codecs/

We now compile the x264 codec

cd x264-snapshot-20081108-2245

./configure --enable-shared

make

make install

Get the latest svn ffmpeg

svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg

cd ffmpeg

./configure --enable-libamr-nb --enable-libamr-wb --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --disable-ffplay --enable-shared --enable-gpl --enable-postproc --enable-nonfree --enable-avfilter --enable-pthreads

make

make install

export LD_LIBRARY_PATH=/usr/local/lib

Now we need to edit the

/etc/ld.so.conf

and add this new line

/usr/local/lib

After this we launch the command:

ldconfig

OK, now we need to disable the SELINUX security

/etc/sysconfig/selinux

changing the line

SELINUX=disabled

We have now complete and we need only to reboot the system