# 启动命令参数介绍
./webrtc-streamer [-H http port] [-S[embeded stun address]] -[v[v]]  [url1]...[urln]
./webrtc-streamer [-H http port] [-s[external stun address]] -[v[v]] [url1]...[urln]
./webrtc-streamer -V
    	-v[v[v]]           : verbosity
    	-V                 : print version
    	-H [hostname:]port : HTTP server binding (default 0.0.0.0:8000)
	-w webroot         : path to get files
	-c sslkeycert      : path to private key and certificate for HTTPS
	-N nbthreads       : number of threads for HTTP server
	-A passwd          : password file for HTTP server access
	-D authDomain      : authentication domain for HTTP server access (default:mydomain.com)

	-S[stun_address]                   : start embeded STUN server bind to address (default 0.0.0.0:3478)
	-s[stun_address]                   : use an external STUN server (default:stun.l.google.com:19302 , -:means no STUN)
	-t[username:password@]turn_address : use an external TURN relay server (default:disabled)
	-T[username:password@]turn_address : start embeded TURN server (default:disabled)

	-a[audio layer]                    : spefify audio capture layer to use (default:0)
	-q[filter]                         : spefify publish filter (default:.*)
	-o                                 : use null codec (keep frame encoded)

	-C config.json                     : load urls from JSON config file
	-R [Udp port range min:max]        : Set the webrtc udp port range (default 0:65535)

	-n name -u videourl -U audiourl    : register a name for a video url and an audio url
[url]                              : url to register in the source list