In libavfilter, use consistently "Copyright (c)" in the licenseheaders.
Originally committed as revision 25838 to svn://svn.ffmpeg.org/ffmpeg/trunk
Use hierarchic names convention (prefix them with av_expr) for theeval API.
More grep-friendly and more consistent with the rest of the FFmpegAPI.
Originally committed as revision 25708 to svn://svn.ffmpeg.org/ffmpeg/trunk
Implement settb filter.
Originally committed as revision 25445 to svn://svn.ffmpeg.org/ffmpeg/trunk