[Libav-user] Good libavfilter tutorial

[Ricky Huang]

Hello all,

I am new to libavfilter and I am currently learning how to develop my own filter for frame analysis.  I am using this tutorial/guide, http://wiki.multimedia.cx/index.php?title=FFmpeg_filter_HOWTO, and it feels outdated being modified last on July 2010.  The example it uses, vf_negatem, does not exist any more.  Also the libavfilter documentation packaged in the ffmpeg source only describes what they are, now how to write one.

Any pointers would be appreciated.   Thanks.

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