How to increase the USB snap/buffer length to capture bigger packages?

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Or possibly this was the issue fixed in USBPcap 1.4.1.0? From https://github.com/desowin/usbpcap/re...:

• Remove the 65535 upper limit on Wireshark extcap interface snaplen parameter

In any case, upgrading to the latest available version is usually the best thing to do, regardless.

But due to WTAP_MAX_PACKET_SIZE_USBPCAP definition, won't there still be a 1,048,576 byte limit imposed?

Thanks for the feedback. I tried using the development version of Wireshark now in addition to manually copying USBPcapCMD.exe to the extcap folder, but Wireshark still complains that the packet is too long as soon as the stream starts. I've also asked the developer of USBPcapCMD which confirms that the newest version of USBPcapCMD do work as intended and that the packages are captured, so it's basically Wireshark/tshark that have this 2^20 size limit on packets it seems, as @cmaynard commented.

Assume this means that I just have to hope this size limit is increased further or write a parser from scratch to extract the usb.pcap data.

To close the loop here, the value of WTAP_MAX_PACKET_SIZE_USBPCAP has been raised from 1MiB to 128MiB. See Bug 15985 for the references to the commits that implemented this.

So, in addition to an update of USBPcap as @pascal-quantin suggested, an updated version of Wireshark that raises this limit is also needed. Until the next stable/development release is made, an automated installer can be downloaded from https://www.wireshark.org/download/au....