Introduction - If you have any usage issues, please Google them yourself
Mainly Dahua device video playback sdk use examples to get free channel number, the user can not call this function to specify a port.
2. Set Streaming mode
3. Open the file stream or live stream
4. Set the callback function, the callback is not required, it may not be provided
5. Set the type of stream decoding callback
6. Start playing the file or stream live stream
7. The input file or stream live stream, after calling PLAY_Play we need to continue to call this function if the call fails, sleep for some time, waiting for sufficient input buffer