Hi all, i'd like to decrypt a SRTP-Stream, captured by my sip-phone. Unfortunately,the error message tells me nothing: (here with line breaks) $ /opt/pjsip/pjsip-apps/bin/samples/x86_64-pc-linux-gnu/pcaputil -c AES_CM_128_HMAC_SHA1_80 -k gRWbrz1cnbskVihoQKhue0Uz5jp/ryH9wyWR1MHF /home/dominique/tmp/trace_tls_snom_03092013_one.pcap /home/dominique/tmp/snom.wav 09:55:00.246 os_core_unix.c !pjlib 2.1-svn for POSIX initialized 09:55:00.247 pjlib select() I/O Queue created (0xa89cb8) 09:55:00.247 endpoint.c Warning: no worker thread is created inmedia endpoint for internal ioqueue pcaputil: ../src/pjmedia/transport_srtp.c:400: pjmedia_transport_srtp_create: Assertion `endpt && tp && p_tp' failed. Abgebrochen I have also tries with more parameters ex: src-ip/dest-ip/src-port/dst-port and an pcap with an extracted stream. Every time the same error. Someone has an idea? Thank you very much Dominique