After reviewing the flashphoner.log:
10:00:03,300 INFO RtspAgent - pool-35-thread-1 build auth header: einstein wise rtsp://10.20.30.21/Streaming/Channels/2/ SETUP
10:00:03,301 INFO RtspAgent - pool-35-thread-1 built auth header: Basic ZWluc3RlaW46d2lzZQ==
10:00:03,301...