视频采集时序图

pollstream_process

mysql

storage start task log  to db

storage end task log  to db

send video stream with rtmp

end task

decode

storage img file

poll video stream with rtmp

start collection task 

Turn on the camera Capture video 

nginx-rtmp_process

Turn off the camera 

walle

start task send sn

Acquisition_process

encode  

storage  img file param  to db