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Transcribing audio from dynamic RTP's

When I select Telephony --> RTP --> RTP Streams, my customer's pcap shows dynamic RTP's (RTPPayload type 104, 109 and 97. Since I know these are dynamic (most probably video), is there any way for me to listen to the audio?

Example:

Source Adreess: 1.1.1.1 Source Port: 2000 Destination address: 2.2.2.2 Destination port: 3400 SSRC: doesn't matter Payload: RTPType-104 Packets: 16409 Lost: 70 (0.4%) Max Delta: 39.922

Any input would be greatly appreciated.