librtmp-dev 2.4~20110711.gitc28f1bab-1 (i386 binary) in ubuntu precise

 A small dumper for media content streamed over the RTMP protocol (like BBC's
 iPlayer high quality streams). Supplying an rtmp URL will result in a dumped
 flv file, which can be played/transcoded using ffmpeg/mplayer, etc.
 .
 This package contains the development libraries, header files needed by
 programs that want to compile with librtmp.