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AVbin
=====

:Home:    http://code.google.com/p/avbin
:Contact: Alex Holkner <[email protected]>


Building
--------

AVbin is designed to be used with a particular version of FFmpeg.  This
is checked out automatically into the `ffmpeg` directory when you use the SVN
sources of AVbin.  If you've downloaded a source archive, you'll need to get
the appropriate version of FFmpeg::

    svn checkout -r `cat ffmpeg.revision` \
                 svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg

Use the included `build.sh` script to compile AVbin.  This takes care of
configuring FFmpeg correctly, compiling it, then linking it with the AVbin
sources.  The final AVbin libraries are placed in the `dist` directory.

If you've just updated the FFmpeg and the current AVbin distribution contains
an ffmpeg.patch file, first run::

    ./build.sh --patch ffmpeg.patch

to apply some AVbin-specific patches to FFmpeg.  Then, on a 64-bit Linux
computer run::

    ./build.sh linux-x86-64 linux-x86-32

or on an Intel Mac OS X computer run::

    ./build.sh darwin-universal

or on a 32-bit Windows run::

    ./build.sh win32

Run ``build.sh --help`` for more information.


Caveats
-------

AVbin is currently supported only on the following platforms

* Linux
  - x86 (cross-compiled from x86-64)
  - x86-64
* Mac OS X 10.4
  - PowerPC (32-bit only; cross-compiled from x86)
  - x86 (32-bit only)
* Windows XP, Vista
  - x86 (32-bit only)

The configuration scripts currently assume cross-compilation for Linux-x86-32
and Darwin-ppc-32.  Minor changes should be needed to get these to compile on
the target platform.  Patches for this or other platforms are welcome.

Darwin compilation currently requires OS X 10.5.

Installation and usage
----------------------

Place the resulting avbin.so, avbin.dylib or avbin.dll in the appropriate
system directory.

The AVbin dynamic library exports all of FFmpeg's functions from libavcodec,
libavutil and libavformat.  It also exports some higher-level functions which
have a fixed ABI (they will not change in incompatible ways in future
releases), documented in ``include/avbin.h``.

License
-------

Due to the linkage between AVbin and FFmpeg, AVbin must be licensed under the
LGPL or GPL.  Currently all GPL features of the FFmpeg configuration are
disabled, permitting LGPL use.

You should see the accompanying COPYING and COPYING.LESSER files for details.
In summary, you must note the usage of FFmpeg and AVbin within the
documentation of your application.  If you make changes to either library, you
must include the sources of these changes within your application.