I am trying to build a test app to test server SRTP decode-encode, in client, it create one PeerConnection, it provide the OFFER(actpass mode), server gives the ANSWER(passive mode). The test app will decrypt the received RTP data and re-encrypt and send back to client. I expected to see my local video echoed back, but the video is black.
I want through the negotiation part, the remote SDP has been set correctly, the remote video is added and connected. I also captured the network traffic, I checked the STUN/DTLS parts are completed successfully. In the test app, I found the srtp decrypt has all success, and re-encrypt without error.
How can I debug why it is still black? decode failure? I guess the SRTP decrypt is successful because if I give wrong SRTP data, it will print srtp failed in chrome_debug.log
