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+-------------------------------------------------------------------------
+             The Xiph.org Foundation's libtheora 1.2
+-------------------------------------------------------------------------
+
+*** What is Theora?
+
+Theora is Xiph.Org's first publicly released video codec, intended
+for use within the Foundation's Ogg multimedia streaming system.
+Theora is derived directly from On2's VP3 codec, adds new features
+while allow it a longer useful lifetime as an competitive codec.
+
+The 1.0 release decoder supported all the new features, but the
+encoder is nearly identical to the VP3 code.
+
+The 1.1 release featured a completely rewritten encoder, offering
+better performance and compression, and making more complete use
+of the format's feature set.
+
+The 1.2 release features significant additional improvements in
+compression and performance. Files produced by newer encoders can
+be decoded by earlier releases.
+
+*** Where is Theora?
+
+Theora's main site is www.theora.org.  Theora and related libraries
+can be gotten from www.theora.org or the main Xiph.Org site at
+www.xiph.org.  Development source is kept in an open subversion 
+repository, see http://theora.org/svn/ for instructions.
+
+-------------------------------------------------------------------------
+Getting started with the code
+-------------------------------------------------------------------------
+
+*** What do I need to build the source?
+
+Requirements summary:
+
+  For libtheora:
+
+      libogg 1.1 or newer.
+
+  For example encoder:
+
+      as above,
+
+      libvorbis and libvorbisenc 1.0.1 or newer.
+      (libvorbis 1.3.1 or newer for 5.1 audio)
+
+  For creating a source distribution package:
+
+      as above,
+
+      Doxygen to build the API documentation,
+      pdflatex and fig2dev to build the format specification
+        (transfig package in Ubuntu).
+
+  For the player only:
+
+      as above,
+
+      SDL (Simple Direct media Layer) libraries and headers,
+      OSS audio driver and development headers.
+
+The provided build system is the GNU automake/autoconf system, and
+the main library, libtheora, should already build smoothly on any
+system.  Failure of libtheora to build on a GNU-enabled system is
+considered a bug; please report problems to theora-dev@xiph.org.
+
+Windows build support is included in the win32 directory.
+
+Project files for Apple XCode are included in the macosx directory.
+
+There is also a more limited scons build.
+
+*** How do I use the sample encoder?
+
+The sample encoder takes raw video in YUV4MPEG2 format, as used by
+lavtools, mjpeg-tools and other packages. The encoder expects audio,
+if any, in a separate wave WAV file. Try 'encoder_example -h' for a 
+complete list of options.
+
+An easy way to get raw video and audio files is to use MPlayer as an
+export utility.  The options " -ao pcm -vo yuv4mpeg " will export a
+wav file named audiodump.wav and a YUV video file in the correct
+format for encoder_example as stream.yuv.  Be careful when exporting
+video alone; MPlayer may drop frames to 'keep up' with the audio
+timer.  The example encoder can't properly synchronize input audio and
+video file that aren't in sync to begin with.  
+
+The encoder will also take video or audio on stdin if '-' is specified
+as the input file name.
+
+There is also a 'png2theora' example which accepts a set of image
+files in that format.
+
+*** How do I use the sample player?
+
+The sample player takes an Ogg file on standard in; the file may be
+audio alone, video alone or video with audio.
+
+*** What other tools are available?
+
+The programs in the examples directory are intended as tutorial source 
+for developers using the library. As such they sacrifice features and 
+robustness in the interests of comprehension and should not be 
+considered serious applications.
+
+If you're wanting to just use theora, consider the programs linked
+from http://www.theora.org/. There is playback support in a number
+of common free players, and plugins for major media frameworks.
+Jan Gerber's ffmpeg2theora is an excellent encoding front end.
+
+-------------------------------------------------------------------------
+Troubleshooting the build process
+-------------------------------------------------------------------------
+
+*** Compile error, such as:
+
+encoder_internal.h:664: parse error before `ogg_uint16_t'
+
+This means you have version of libogg prior to 1.1. A *complete* new Ogg 
+install, libs and headers is needed.
+
+Also be sure that there aren't multiple copies of Ogg installed in
+/usr and /usr/local; an older one might be first on the search path
+for libs and headers.
+
+*** Link error, such as:
+
+undefined reference to `oggpackB_stream'
+
+See above; you need libogg 1.1 or later.
+
+*** Link error, such as:
+
+undefined reference to `vorbis_granule_time'
+
+You need libvorbis and libvorbisenc from the 1.0.1 release or later.
+
+*** Link error, such as:
+
+/usr/lib/libSDL.a(SDL_esdaudio.lo): In function `ESD_OpenAudio':
+SDL_esdaudio.lo(.text+0x25d): undefined reference to `esd_play_stream'
+
+Be sure to use an SDL that's built to work with OSS.  If you use an
+SDL that is also built with ESD and/or ALSA support, it will try to
+suck in all those extra libraries at link time too.  That will only
+work if the extra libraries are also installed.
+
+*** Link warning, such as:
+
+libtool: link: warning: library `/usr/lib/libogg.la' was moved.
+libtool: link: warning: library `/usr/lib/libogg.la' was moved.
+
+Re-run theora/autogen.sh after an Ogg or Vorbis rebuild/reinstall
+