Failed to identify packet format

usbrply won’t touch this capture that I recorded using Wireshark on Linux using usbmon.

$ usbrply -p /tmp/ver.pcapng 
Traceback (most recent call last):
  File "/usr/local/bin/usbrply", line 4, in <module>
    __import__('pkg_resources').run_script('usbrply==2.0.1', 'usbrply')
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 665, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1470, in run_script
    exec(script_code, namespace, namespace)
  File "/usr/local/lib/python3.8/dist-packages/usbrply-2.0.1-py3.8.egg/EGG-INFO/scripts/usbrply", line 124, in <module>
  File "/usr/local/lib/python3.8/dist-packages/usbrply-2.0.1-py3.8.egg/EGG-INFO/scripts/usbrply", line 113, in main
  File "/usr/local/lib/python3.8/dist-packages/usbrply-2.0.1-py3.8.egg/usbrply/parsers.py", line 19, in pcap2json
  File "/usr/local/lib/python3.8/dist-packages/usbrply-2.0.1-py3.8.egg/usbrply/pcap_util.py", line 137, in guess_parser
AssertionError: failed to identify packet format

In order to minimize the example this pcapng contains a single packet exported from Wireshark (had to rename for github): ver.pcapng.txt

[JohnDMcMaster]

Gotcha. Ok I think your issue should be resolved now: I’ve improved OS detection and your capture is incomplete. But feel free to reach out again if you still have issues.

[durka]

OK, I can try the capture again. I filtered the Wireshark display to only the outgoing packets before exporting.