Capturing and Replaying RTP Traffic

Required software

• Ethereal (www.ethereal.com)
• Sun Java Media Framework software (http://java.sun.com/products/java-media/jmf/)
• RTP Tools (http://www.cs.columbia.edu/IRT/software/rtptools/)

Capturing and extracting RTP stream

Using Ethereal, capture traffic between endpoints:

Statistics – RTP – Show All Streams:

Select a stream and save as c:\captures\stream.rtp

Replaying the capture

Start Java Media Studio:

File – Open RTP Session

From the command line, use RTP Tools’ rtppplay to send the capture to the RTP listener:

rtpplay –f c:\captures\stream.rtp 192.168.0.96/7500

Enjoy the show:

Tested with H.263 video and G.711 audio streams.