求翻译：在监控软件中，默认码流1是开启的，必须把码流2开启才可以使用双码流。开启码流2的方式是：“设备设置”—>“视音频”页面中，当前码流选择码流2，并勾选启用本码流，如下图：是什么意思？

Monitoring software, the default stream is open, the stream must be two open you can use the dual-stream. Way open stream: "Device Settings" -> "audio" page, the current stream to select stream 2, and check to enable the stream, as shown below:

In the monitoring software, the default code stream 1 is turned on, the code must be 2 before you can use on dual streaming. On the way streaming 2 is: "Device Settings" -> "Audio Visual page, the current streaming Select Streaming 2 and check the Enable this code, as shown in the figure:

In monitors in the software, the default symbol stream 1 is opening, must only then be possible to use symbol stream 2 opening the double symbol stream.The opening symbol stream 2 ways are: “The equipment establishment” - > “regards the audio frequency” in the page, the current symbol stream choi

Monitoring and control software, stream 1 is turned on by default, stream 2 must be turned on before you can use dual stream. Open stream 2 is: "device settings"-> "video and audio" page, current stream stream 2 is selected, and check the enable this stream, as shown below: