ok, thanks! I observe spice gtk static int usbredir_write_callback(void *user_data, uint8_t *data, int count) { ... printf("data %d\n", *data); ... } when I redirect webcam, and using *amcap*. The data display data 100 data 100 data 100 ... data 4 data 5 data 11 data 100 data 100 ... data 14 data 102 data 102 data 102 data 102 ... but I observe USB redirection on windows. The data display data 100 data 100 data 100 ... data 4 data 5 data 11 data 100 data 100 ... data 4 data 5 data 11 data 100 data 100 then, stop... where would be probably wrong? _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/spice-devel