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dvb-s2 example pcap file not interpreted correctly

I am having difficulty sniffing DVB-S2 packets.

To check that Wireshark is working as advertised, I downloaded the file: SampleCaptures/dvb-s2_bb_example.pcap from the Wireshark DVB-S2 wiki page. I passed it into Wireshark, but saw only Ethernet, UDP and ARP packets, not DVB-S2 packets as the screenshot on the wiki page shows. Adding the suggested filter: dvb-s2_modeadapt or dvb-s2_bb or dvb-s2_gse leaves no packets at all, as does using each of those filters in isolation. I have tried this on Ubuntu 16.04, Ubuntu 18.04 and Raspberry Pi 3B+, each with stock Wireshark from the OS repo.

I can't find any reference to this problem in the bug reports.

Any suggestions?