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SIPp / sipp

The SIPp testing tool
https://sipp.readthedocs.io
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silence with SRTP #631

Open stshishkin opened 1 year ago

stshishkin commented 1 year ago

Hello,

I try to play an encoded audio file in SRTP but hear nothing. First of all, I add the following lines in INVITE:

      a=crypto:[cryptotag1audio] [cryptosuiteaescm128sha1801audio] inline:[cryptokeyparams1audio]
      a=crypto:[cryptotag2audio] [cryptosuiteaescm128sha1322audio] inline:[cryptokeyparams2audio]

use the following RTP description:

  <nop>
    <action>
      <exec rtp_stream="encoded.wav,1,0,PCMU/8000" />
    </action>
  </nop>

and change transport mode to TLS one socket: sipp -sf ./call.xml -t l1 -tls_key ./cakey.pem -tls_cert ./cacert.pem -s "$USER_ID" -ap "$USER_PWD" -key number "$NUMBER" -d "$CALL_DURATION" example.com:5061

Calls successfully connect. But I hear nothing.

If I use the pattern example from the rtpcheck_xml_syntax_reference.pdf I hear the clicks. 

  <nop>
    <action>
      <exec rtp_stream="apattern,1,0,PCMU/8000" />
    </action>
  </nop>

Are there any restrictions for using audio files in SRTP scenarios?

acumeeple commented 9 months ago

This is likely due to the same reason as #665 - the rtpstream play thread gets hopelessly behind and all your audio getsthrown away in the jitter buffer at the receiving end.