Extracting RTP stats from pcap files using Tshark and using absolute timestamp in epoch

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Is it possible to get the start and end time in absolute epoch? I am trying to process some pcap files I received from someone and trying to build a parser to convert this to CSV. However, my first step is to figure out how to get the timestamp in epoch. Thanks

root@abc:~/downloads# tshark -r call-from-other-tur-19may2022-1.pcap -q -z rtp,streams
Running as user "root" and group "root". This could be dangerous.
========================= RTP Streams ========================
Start time End time  Src IP addr  Port  Dest IP addr Port  SSRC       Payload Pkts Lost     Min Delta(ms) Mean Delta(ms) Max Delta(ms) Min Jitter(ms) Mean Jitter(ms) Max Jitter(ms) Problems?
1.681994   17.526699 172.16.0.245 12000 219.34.96.55 12010 0x57C314A9 g711A   793  0 (0.0%) 19.090        20.006         25.106        0.052          0.191           0.511
1.679413   17.518439 219.34.96.55 12010 172.16.0.245 12000 0x726160A7 g711A   793  0 (0.0%) 18.989        19.999         24.241        0.001          0.312           0.564
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