gistfile1.txt

lahwran@home:/media/storage/ffmpeg$ ./configure --enable-openal --enable-libx264 --enable-libmp3lame --enable-libspeex --enable-libtheora --enable-nonfree --enable-x11grab --prefix=/usr/local --enable-libv4l2 --enable-libxvid --enable-gpl
ERROR: libmp3lame >= 3.98.3 not found

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solving the problem.
lahwran@home:/media/storage/ffmpeg$ lame --version
LAME 32bits version 3.98.4 (http://www.mp3dev.org/)

Can I use LAME in my commercial program?

Yes, you can, under the restrictions of the LGPL.  In particular, you
can include a compiled version of the LAME library (for example,
lame.dll) with a commercial program.  Some notable requirements of
the LGPL:

1. In your program, you cannot include any source code from LAME, with
   the exception of files whose only purpose is to describe the library
   interface (such as lame.h).

2. Any modifications of LAME must be released under the LGPL.
   The LAME project (www.mp3dev.org) would appreciate being
   notified of any modifications.

3. You must give prominent notice that your program is:
      A. using LAME (including version number)
      B. LAME is under the LGPL
      C. Provide a copy of the LGPL.  (the file COPYING contains the LGPL)
      D. Provide a copy of LAME source, or a pointer where the LAME
         source can be obtained (such as www.mp3dev.org)
   An example of prominent notice would be an "About the LAME encoding engine"
   button in some pull down menu within the executable of your program.

4. If you determine that distribution of LAME requires a patent license,
   you must obtain such license.


*** IMPORTANT NOTE ***

The decoding functions provided in LAME use the mpglib decoding engine which
is under the GPL.  They may not be used by any program not released under the
GPL unless you obtain such permission from the MPG123 project (www.mpg123.de).

lahwran@home:/media/storage/ffmpeg$