The 'Video Filter API' is better known as 'libavfilter'.

Originally committed as revision 10815 to svn://svn.ffmpeg.org/ffmpeg/trunk

doc/hooks.texi

@@ -12,9 +12,10 @@
 
 @var{Please be aware that vhook is deprecated, and hence its development is
 frozen (bug fixes are still accepted).
-The substitute will be the result of our 'Video Filter API' Google Summer of Code
-project. You may monitor its progress by subscribing to the ffmpeg-soc mailing
-list at @url{http://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-soc}.}
+The substitute will be 'libavfilter', the result of our 'Video Filter API'
+Google Summer of Code project. You may monitor its progress by subscribing to
+the ffmpeg-soc mailing list at
+@url{http://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-soc}.}
 
 The video hook functionality is designed (mostly) for live video. It allows
 the video to be modified or examined between the decoder and the encoder.