Hi! We have the following interesting scenario, has anyone done that before?
We have a live camera stream to serve, that we need to convert and must be
used on html5 video tag. Since html5 does not work with udp for multicast
use, we need to use the same ffmpeg converted stream to more that one
client (response), to avoid creating multiple instances of ffmpeg to the
same source camera.
But it seems that the stream cannot be piped to more than 1 response. First
one gets the stream alright, but the second one does not.
We are storing the converted stream (stdout) in an array (one stdout for
each source camera) but it does not pipe to a second client response.
Any ideas of how to do that?
Thanks!
Here is the code:
var request = require('request');var http = require('http');var child_process =
require("child_process");var n = 1;var stdouts = {};
http.createServer(function (req, resp) {
console.log("***** url ["+req.url+"], call "+n);
if (req.url != "/favicon.ico" && req.url != "/"){var params =
req.url.substring(1).split("/");
switch (params[0]){
case "VIEW":
if (params[1] == "C2FLOOR1" || params[1] == "C2FLOOR2" || params[1] ==
"C2PORFUN" || params[1] == "C2TESTCAM")
var camera =
"rtsp://192.168.16.19:554/Inter/Cameras/Stream?Camera="+params[1];
else
var camera =
"http://192.168.16.19:8609/Inter/Cameras/GetStream?Camera="+params[1];
// Write header
resp.writeHead(200, {'Content-Type': 'video/ogg', 'Connection':
'keep-alive'});
if (stdouts.hasOwnProperty(params[1]))
{
console.log("Getting stream already created for camera "+params[1]);
var newStdout = Object.create(stdouts[params[1]]);
newStdout.pipe(resp);
}
else
{
// Start ffmpeg
var ffmpeg = child_process.spawn("ffmpeg",[
"-i",camera,
"-vcodec","libtheora",
"-qscale:v","7", // video quality
"-f","ogg", // File format
"-g","1", // GOP (Group Of Pictures) size
"-" // Output to STDOUT
]);
stdouts[params[1]] = ffmpeg.stdout;
// Pipe the video output to the client response
ffmpeg.stdout.pipe(resp);
console.log("Initializing camera at "+camera);
}
// Kill the subprocesses when client disconnects/*
resp.on("close",function(){
ffmpegs[params[1]].kill();
console.log("FIM!");
});
*/
break;}}else{
resp.writeHeader(200, {"Content-Type": "text/html"});
resp.write("WRONG CALL");
resp.end();}
n++;
}).listen(8088);
console.log('Server running at port 8088');
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