2007-08-11 21:59:48 +02:00
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OverLua is a plugin library that runs a Lua script to process video frames,
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primarily intended to produce advanced overlay graphics. The target audience
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is currently primarily programmers.
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The name is intended as a pun on Overlay and Lua.
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To help produce overlay graphics, OverLua provides an interface to the
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2007-08-13 21:06:07 +02:00
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cairo vector graphics library. A library of functions to do raster-based
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2007-08-11 21:59:48 +02:00
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graphics processing is also included.
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Curerently the only known-working plugin interface to OverLua is the Avisynth
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interface. A CSRI interface is also included but it's neither tested nor
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actively maintained. Patches to make the CSRI interface work are most welcome.
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Further interfaces would also be appreciated, eg. one for mencoder.
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The most thorough documentation is still the source code but I'm working on
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throwing together something more useful. See the other text files included
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in the distribution.
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Notes on the pre-built DLL file
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-------------------------------
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The included pre-built DLL is compiled with Microsoft Visual C++ 2005 SP1
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and so will require the runtime library for that version of the compiler.
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You can download the required runtime library at this location:
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<http://www.microsoft.com/downloads/details.aspx?FamilyID=200b2fd9-ae1a-4a14-984d-389c36f85647&DisplayLang=en>
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The DLL is built with SSE2 optimisations, meaning it will very likely crash
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if you attempt to use it on a computer without SSE2 support.
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Finally, the DLL is built with OpenMP optimisations enabled, which means it
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will take advantage of multi-core and other SMP systems if available. The
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OpenMP optimisations are only in the raster image filtering and the
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2007-08-13 21:06:07 +02:00
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cairo surface/video frame interaction functions. If you do not use the raster
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2007-08-11 21:59:48 +02:00
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graphics operations much you won't see much gain from this SMP support either.
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Licensing
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---------
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OverLua is licensed under version 2 of the GNU General Public License. This
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means that you get no warranties of any kind.
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See the file GPLv2.txt for details.
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