What is VideoJak?
VideoJak is an IP Video security assessment tool that can simulate a proof of concept DoS against a targeted, user-selected video session and IP video phone. VideoJak is the first of its kind security tool that analyzes video codec standards such as H.264.
VideoJak works by first capturing the RTP port used in a [...]

ohrwurm is a small and simple RTP fuzzer, it has been tested it on a small number of SIP phones, none of them withstood the fuzzing.

Features:

reads SIP messages to get information of the RTP port numbers
reading SIP can be omitted by providing the RTP port numbers, so that any RTP traffic can be fuzzed
RTCP traffic [...]

rtpbreak 1.3a has been released, we initially brought you news of this tool back in August 2007 with the first announcement of rtpbreak.

With rtpbreak you can detect, reconstruct and analyze any RTP session. It doesn’t require the presence of RTCP packets and works independently form the used signaling protocol (SIP, H.323, SCCP etc). The input [...]

rtpBreak detects, reconstructs and analyzes any RTP [rfc1889] session through heuristics over the UDP network traffic. It works well with SIP, H.323, SCCP and any other signaling protocol. In particular, it doesn’t require the presence of RTCP packets (voipong needs them) that aren’t always transmitted from the recent VoIP clients.
The RTP sessions are composed by [...]