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webcam displyed on LAN not to the internet
9 juin 2015, par Francois BaretOK, this is not due to a dumb mistake : I have forwarded the port and there is no firewall in between.
I try to make the "live streaming" section of jsmpeg (https://github.com/phoboslab/jsmpeg) to work on the Internet. To get the webcam stream on my webpage I modify "stream-server.js"if( process.argv.length < 3 ) {
console.log(
'Usage: \n' +
'node stream-server.js <secret> [ ]'
);
process.exit();
}
var STREAM_SECRET = process.argv[2],
STREAM_PORT = process.argv[3] || 8082,
WEBSOCKET_PORT = process.argv[4] || 8084,
STREAM_MAGIC_BYTES = 'jsmp'; // Must be 4 bytes
var width = 320,
height = 240;
// Websocket Server
var socketServer = new (require('ws').Server)({port: WEBSOCKET_PORT});
socketServer.on('connection', function(socket) {
// Send magic bytes and video size to the newly connected socket
// struct { char magic[4]; unsigned short width, height;}
var streamHeader = new Buffer(8);
streamHeader.write(STREAM_MAGIC_BYTES);
streamHeader.writeUInt16BE(width, 4);
streamHeader.writeUInt16BE(height, 6);
socket.send(streamHeader, {binary:true});
console.log( 'New WebSocket Connection ('+socketServer.clients.length+' total)' );
socket.on('close', function(code, message){
console.log( 'Disconnected WebSocket ('+socketServer.clients.length+' total)' );
});
});
socketServer.broadcast = function(data, opts) {
for( var i in this.clients ) {
if (this.clients[i].readyState == 1) {
this.clients[i].send(data, opts);
}
else {
console.log( 'Error: Client ('+i+') not connected.' );
}
}
};
// HTTP Server to accept incomming MPEG Stream
var streamServer = require('http').createServer( function(request, response) {
var params = request.url.substr(1).split('/');
if( params[0] == STREAM_SECRET ) {
width = (params[1] || 320)|0;
height = (params[2] || 240)|0;
console.log(
'Stream Connected: ' + request.socket.remoteAddress +
':' + request.socket.remotePort + ' size: ' + width + 'x' + height
);
request.on('data', function(data){
socketServer.broadcast(data, {binary:true});
});
}
else {
console.log(
'Failed Stream Connection: '+ request.socket.remoteAddress +
request.socket.remotePort + ' - wrong secret.'
);
response.end();
}
}).listen(STREAM_PORT);
console.log('Listening for MPEG Stream on http://127.0.0.1:'+STREAM_PORT+'/<secret>/<width>/<height>');
console.log('Awaiting WebSocket connections on ws://127.0.0.1:'+WEBSOCKET_PORT+'/');
var servi = require('servi'), // include the servi library
app = new servi(false); // servi instance
// configure the server's behavior:
app.port(8080); // port number to run the server on
app.serveFiles("public"); // serve all static HTML files from /public
app.start();
console.log("Listening for new clients on port 8080");</height></width></secret></secret>
<h1>
The Canvas size specified
</h1>
<canvas width="640" height="480">
<p>
Please use a browser that supports the Canvas Element, like
<a href="http://www.google.com/chrome">Chrome</a>,
<a href="http://www.mozilla.com/firefox/">Firefox</a>,
<a href="http://www.apple.com/safari/">Safari</a> or Internet Explorer 10
</p>
</canvas>
<code class="echappe-js"><script type="text/javascript" src="http://stackoverflow.com/feeds/tag/jsmpg.js"></script><script type="text/javascript"><br />
// Show loading notice<br />
var canvas = document.getElementById('videoCanvas');<br />
var ctx = canvas.getContext('2d');<br />
ctx.fillStyle = '#444';<br />
ctx.fillText('Loading...', canvas.width/2-30, canvas.height/3);<br />
<br />
// Setup the WebSocket connection and start the player<br />
var client = new WebSocket( 'ws://192.168.1.15:8084/' );<br />
var player = new jsmpeg(client, {canvas:canvas});<br />
</script>The "index.html" is included in a "public" folder.
Then I start ffmpeg with :
`ffmpeg -s 640x480 -f video4linux2 -i /dev/video0 -f mpeg1video -b:v 800k -r 30 http://192.168.1.15:8082/1693/640/480/`When I open, on any station of the lan, url 192.168.1.x:8080 I get the webcam streaming on my page "jsmpeg streaming webcam" ; but if use the public ip 41.142.x.y:8080 from outside the local network (using 3G) I get the page (with the h1 line "The Canvas size specified") but no video it just says in the frame "loading".
I do not understand why it works locally and not globally. Why the page is streaming on the internet but not the webcam ?
Thanks for your help !
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