i installed ffmpeg but i need to add image in video so i used imlib2.so but i cant able to find in the following path /usr/lib/vhook/imlib2.so how to install imlib2.so

I'd guess that you either installed one of these,
( or will have to install one ) :
*rpm
http://www.google.com/search?hl=en&q...=Google+Search
*deb
http://www.google.com/search?hl=en&q...=Google+Search
( ffmpeg-vhook-imlib2 )

But not easy to advise, when you are not telling
which OS you are using, please inform every time
a question is asked.

You might also need 'IMLIB' or 'libimlib2-devel'
('libimlib2-dev') ... same lib, but different name
for different distro's.

Good Luck.

Iam useing centino-32bit with cpanel,core2duo processer with 4gig RAM,iam newbie so only not able to give more details sorry i think this may help u

root@box [~]# wget ftp://ftp.pbone.net/mirror/ftp.pld-l...4.6-1.i586.rpm
--15:33:28-- ftp://ftp.pbone.net/mirror/ftp.pld-l...4.6-1.i586.rpm
=> `ffmpeg-vhook-imlib2-0.4.6-1.i586.rpm'
Resolving ftp.pbone.net... 85.14.85.4
Connecting to ftp.pbone.net|85.14.85.4|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done. ==> PWD ... done.
==> TYPE I ... done. ==> CWD /mirror/ftp.pld-linux.org/dists/1.0/updates/general/i586 ... done.
==> SIZE ffmpeg-vhook-imlib2-0.4.6-1.i586.rpm ... 8665
==> PASV ... done. ==> RETR ffmpeg-vhook-imlib2-0.4.6-1.i586.rpm ... done.
Length: 8665 (8.5K)

100%[=======================================>] 8,665 54.7K/s in 0.2s

15:33:30 (54.7 KB/s) - `ffmpeg-vhook-imlib2-0.4.6-1.i586.rpm' saved [8665]

root@box [~]# rpm -i ffmpeg-vhook-imlib2-0.4.6-1.i586.rpm
error: Failed dependencies:
ffmpeg = 0.4.6 is needed by ffmpeg-vhook-imlib2-0.4.6-1.i586
libImlib2.so.1 is needed by ffmpeg-vhook-imlib2-0.4.6-1.i586
imlib2 is needed by ffmpeg-vhook-imlib2-0.4.6-1.i586
root@box [~]# ffmpeg -l
FFmpeg version SVN-r14473, Copyright (c) 2000-2008 Fabrice Bellard, et al.
configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-liba52 --enable-libamr-nb --enable-libamr-wb --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-cross-compile
libavutil version: 49.7.0
libavcodec version: 51.62.0
libavformat version: 52.18.0
libavdevice version: 52.0.0
built on Aug 6 2008 16:51:52, gcc: 4.1.2 20071124 (Red Hat 4.1.2-42)
ffmpeg: missing argument for option '-l'

i got this error how reslove this

Are you using "Suse" , "Fedora" or some other 'rpm based'
Linux ??, that is what I understand as an OS or distro.
Please inform.

Also : It is much easier to install packages with the
package manager, e.g. yumex or the 'yum' command.

Regards

Sorry, I didn't read all your text, with version
4.1.2, gcc , RedHat, it seems to be "Fedora 8"

So instead of just downloading packages, 'yum' will
download and install in one command , e.g. :
'yum install ffmpeg-vhook-imlib2' and also include
dependencies.

Good Luck !