The Z1 can stream indefinitely over USB at 4K with the following conditions:
- Z1 firmware 1.60.1 (newest)
- USB port it is plugged into needs Battery Charging 1.2 specification
Using a cheap inline power meter, verify that the USB port is sending 600mA to 900mA to the Z1. It needs to be over 600mA. Most USB ports can only push data and 500mA while the data is in use. The Raspberry Pi needs an inline powered USB hub with BC 1.2 to charge the Z1. This won’t work with the V. It does work with RTSP plug-in and Ethernet and can stream indefinitely from the V. With the Z1, the USB port won’t charge while the USB OTG Ethernet adapter is plugged in.