rtspFUZZ is a real time streaming protocol server fuzzer. It uses 6 basic crafting techniques OPTIONS,DESCRIBE,SETUP,PLAY,GET_PARAMETER,TEARDOWN,PAUSE etc rtsp commands and 9 advanced crafting techniques to test any target application. It has the ability to fuzz with Metasploit Pattern (pattern_create.rb) which can be helpful for finding the offset.
You can download it from the following link: https://packetstormsecurity.com/files/download/107136/rtsp_fuzz_v0.1.rar
Source: https://packetstormsecurity.com/files/107136/rtspFUZZ-0.1.html