USB_VENDOR_BLACKMAGIC, LIBUSB_HOTPLUG_MATCH_ANY, LIBUSB_HOTPLUG_MATCH_ANY,
&BMUSBCapture::cb_hotplug, nullptr, nullptr) < 0) {
fprintf(stderr, "libusb_hotplug_register_callback() failed\n");
USB_VENDOR_BLACKMAGIC, LIBUSB_HOTPLUG_MATCH_ANY, LIBUSB_HOTPLUG_MATCH_ANY,
&BMUSBCapture::cb_hotplug, nullptr, nullptr) < 0) {
fprintf(stderr, "libusb_hotplug_register_callback() failed\n");