After I connected to the IP channel, there is no video output in the one\*window or the multiple\*window mode. But I can see there is bit stream.

There are following possibilities:

Check the main stream/sub stream type of the camera is H.264 or not.
Check the device supports camera main stream/sub stream resolution or not (such as 1080P, 720P, 960H, D1, HD1 and etc.).
Check the camera setup. Please make sure It supports the products of other manufacturers.
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