yum install libtool
Loaded plugins: fastestmirror, protectbase
Loading mirror speeds from cached hostfile
* addons: mirror.sanctuaryhost.com
* base: bay.uchicago.edu
* epel: mirrors.servercentral.net
* extras: mirror.steadfast.net
* updates: mirror.unl.edu
0 packages excluded due to repository protections
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package libtool.i386 0:1.5.22-7.el5_4 set to be updated
--> Processing Dependency: autoconf >= 2.50 for package: libtool
--> Processing Dependency: automake >= 1.4 for package: libtool
--> Running transaction check
---> Package autoconf.noarch 0:2.59-12 set to be updated
---> Package automake.noarch 0:1.9.6-2.3.el5 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
libtool i386 1.5.22-7.el5_4 base 667 k
Installing for dependencies:
autoconf noarch 2.59-12 base 647 k
automake noarch 1.9.6-2.3.el5 base 476 k

Transaction Summary
================================================================================
Install 3 Package(s)
Upgrade 0 Package(s)

Total download size: 1.7 M
Is this ok [y/N]: y
Downloading Packages:
(1/3): automake-1.9.6-2.3.el5.noarch.rpm | 476 kB 00:00
(2/3): autoconf-2.59-12.noarch.rpm | 647 kB 00:00
(3/3): libtool-1.5.22-7.el5_4.i386.rpm | 667 kB 00:00
--------------------------------------------------------------------------------
Total 2.6 MB/s | 1.7 MB 00:00
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : autoconf 1/3
Installing : automake 2/3
Installing : libtool 3/3

Installed:
libtool.i386 0:1.5.22-7.el5_4

Dependency Installed:
autoconf.noarch 0:2.59-12 automake.noarch 0:1.9.6-2.3.el5

Complete!



BUT OLD VERSION

i need libtool-2.4.2 but i can not install in http://www.gnu.org/software/libtool/

rpm -ivh gcc-4.8.0-8.fc20.i686.rpm
error: Failed dependencies:
binutils >= 2.20.51.0.2-12 is needed by gcc-4.8.0-8.fc20.i686
cpp = 4.8.0-8.fc20 is needed by gcc-4.8.0-8.fc20.i686
libasan.so.0 is needed by gcc-4.8.0-8.fc20.i686
libatomic.so.1 is needed by gcc-4.8.0-8.fc20.i686
libc.so.6(GLIBC_2.11) is needed by gcc-4.8.0-8.fc20.i686
libc.so.6(GLIBC_2.7) is needed by gcc-4.8.0-8.fc20.i686
libgcc >= 4.8.0-8.fc20 is needed by gcc-4.8.0-8.fc20.i686
libgmp.so.10 is needed by gcc-4.8.0-8.fc20.i686
libgomp = 4.8.0-8.fc20 is needed by gcc-4.8.0-8.fc20.i686
libmpc.so.3 is needed by gcc-4.8.0-8.fc20.i686
libmpfr.so.4 is needed by gcc-4.8.0-8.fc20.i686
rpmlib(FileDigests) <= 4.6.0-1 is needed by gcc-4.8.0-8.fc20.i686
rpmlib(PayloadIsXz) <= 5.2-1 is needed by gcc-4.8.0-8.fc20.i686

i will update centos verion?

?????????
What ??
"gcc-4.8.0-8.fc20.i686.rpm"

"fc20 " is a VERY VERY VERY early alpha TESTING ONLY rpm for the VERY VERY VERY early alpha testing of fedora 20
Fedora 19 is not even released yet

and you are trying to install that on the rather OLD CentOS 5

--- it will NOT WORK ----

now some fedora rpm's can be installed on cent
Fonts,icons,and a few things like that
BUT NOT base components of the operating system

Also gcc 4.8 is SO NEW that not many programs will yet build with it .Most programs will need some hacking of the soiurce code to build using gcc 4.8

there is a reason that CentOS 5 has gcc 4.1


Please fully explain what exactly it is you need
just installing ffmpeg and the codecs for x264

for that install "rpmforge"
install and configure "yum-priorities" plugin
and install ffmpeg ( see my above post -- a few above )


or
do you need , as in a "MUST USE!!!" ffmpeg-0.6.5-2.el6.x86_64.rpm
that is a centos 6 -64 bit program

it will NOT run nor even build on CentOS 5 32 bit operating system

Sure. why not.

But I have CentOS 5.9 x86_64 over here and my installed version is
Name : libtool
Arch : x86_64
Version : 1.5.22

So, yours is 'older', do you really believe that is the cause of this issue?
You "need" libtool-2.4.2, I did not see that requirement at http://ffmpeg.org/trac/ffmpeg/wiki/C...mpilationGuide
nor on the ubuntu link either.

I've installed ffmpeg at least 6 CentOS 5.9 x86_64 machines this week.

libtool version hardly mattered on 6 of them.
says who? Not ffmpeg,that's for sure.

Well, then you'll need to probably install from source.
The latest stable version is http://ftpmirror.gnu.org/libtool/libtool-2.4.2.tar.gz INSTALL says:
The simplest way to compile this package is:
as root:
John VV:
I saw that fc20 also. good catch.

OP: Good luck.