[root@ratm avidemux_2.4]# autoreconf -ifm configure.in
autoreconf: configure.in: AM_GNU_GETTEXT is used, but not AM_GNU_GETTEXT_VERSION
configure.in:64: error: possibly undefined macro: AC_PROG_LIBTOOL
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.in:112: error: possibly undefined macro: AC_ENABLE_SHARED
configure.in:116: error: possibly undefined macro: AC_ENABLE_STATIC
autoreconf: /usr/bin/autoconf failed with exit status: 1
[root@ratm avidemux_2.4]#

help me to install it without errors ...please

Please do not put URGENT in the subject - what is urgent to you is not urgent to anyone else here and sounds rather rude. People donate their time for free, so you are not in a position to expect an answer in any specific time frame, or at all for that matter.

In addition to this social blunder, you have not provided enough technical detail to enable a good answer. No information about your distro, what version of automake/autoconf/libtool/gcc you have installed, and even what you are trying to do. You leave it up to the reader to guess that from the prompt in the console output which you have not posted in [code] tags to improve readability.

If you are trying to build avidemux - something I guessed from the prompt - why are you running autoreconf? The INSTALL file for avidemux is the generic GNU build tool INSTALL file, which instructs you to do:
...to build the software. No mention of autoreconf at all.

dude , sorry yaar , i hadnt seen the suggestion for bad things to say clearly , thought it was included in the good section :-)

ofcourse i kno it asks me to ./configure && make
i had tried that but the configure file wasnt made ...
anyways my autoconf gives me that msg i posted and my distro is fedora 8

Did you get an error when you ran configure? If so, what was it?