提供一系列的小工具处理使用RTP协议传输的数据，包括：
rtpplay
Play back RTP sessions recorded by rtpdump
rtpsend
Generate RTP packets from textual description, generated by hand or rtpdump
rtpdump
Parse and print RTP packets, generating output files suitable for rtpplay and rtpsend
rtptrans
RTP translator between unicast and multicast networks; also translates between VAT and RTP formats.
