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Submit enhancements and plugins
13 avril 2011If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
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Configurer la prise en compte des langues
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RTP packets detected as UDP
28 février 2017, par user3172852Here is what I am trying to do :
WebRTC endpoint > RTP Endpoint > ffmpeg > RTMP server.
This is what my SDP file looks like.
var cm_offer = "v=0\n" +
"o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
"s=nginx\n" +
"c=IN IP4 127.0.0.1\n" +
"t=0 0\n" +
"m=audio 60820 RTP/AVP 0\n" +
"a=rtpmap:0 PCMU/8000\n" +
"a=recvonly\n" +
"m=video 59618 RTP/AVP 101\n" +
"a=rtpmap:101 H264/90000\n" +
"a=recvonly\n";What’s happening is that wireshark can detect the incoming packets at port 59618, but not as RTP packets but UDP packets. I am trying to capture the packets using ffmpeg with the following command :
ubuntu@ip-132-31-40-100:~$ ffmpeg -i udp://127.0.0.1:59618 -vcodec copy stream.mp4
ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
libavutil 55. 44.100 / 55. 44.100
libavcodec 57. 75.100 / 57. 75.100
libavformat 57. 63.100 / 57. 63.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 69.100 / 6. 69.100
libavresample 3. 2. 0 / 3. 2. 0
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100All I get is a blinking cursor and The stream.mp4 file is not written to disk after I exit (ctrl+c).
So can you help me figure out :
- why wireshark cannot detect the packets as RTP (I suspect it has something to do with SDP)
- How to handle SDP answer when the RTP endpoint is pushing to ffmpeg which doesn’t send an answer back.
Here is the entire code (hello world tutorial modified)
/*
* (C) Copyright 2014-2015 Kurento (http://kurento.org/)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function getopts(args, opts)
{
var result = opts.default || {};
args.replace(
new RegExp("([^?=&]+)(=([^&]*))?", "g"),
function($0, $1, $2, $3) { result[$1] = decodeURI($3); });
return result;
};
var args = getopts(location.search,
{
default:
{
ws_uri: 'wss://' + location.hostname + ':8433/kurento',
ice_servers: undefined
}
});
function setIceCandidateCallbacks(webRtcPeer, webRtcEp, onerror)
{
webRtcPeer.on('icecandidate', function(candidate) {
console.log("Local candidate:",candidate);
candidate = kurentoClient.getComplexType('IceCandidate')(candidate);
webRtcEp.addIceCandidate(candidate, onerror)
});
webRtcEp.on('OnIceCandidate', function(event) {
var candidate = event.candidate;
console.log("Remote candidate:",candidate);
webRtcPeer.addIceCandidate(candidate, onerror);
});
}
function setIceCandidateCallbacks2(webRtcPeer, rtpEp, onerror)
{
webRtcPeer.on('icecandidate', function(candidate) {
console.log("Localr candidate:",candidate);
candidate = kurentoClient.getComplexType('IceCandidate')(candidate);
rtpEp.addIceCandidate(candidate, onerror)
});
}
window.addEventListener('load', function()
{
console = new Console();
var webRtcPeer;
var pipeline;
var webRtcEpt;
var videoInput = document.getElementById('videoInput');
var videoOutput = document.getElementById('videoOutput');
var startButton = document.getElementById("start");
var stopButton = document.getElementById("stop");
startButton.addEventListener("click", function()
{
showSpinner(videoInput, videoOutput);
var options = {
localVideo: videoInput,
remoteVideo: videoOutput
};
if (args.ice_servers) {
console.log("Use ICE servers: " + args.ice_servers);
options.configuration = {
iceServers : JSON.parse(args.ice_servers)
};
} else {
console.log("Use freeice")
}
webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendrecv(options, function(error)
{
if(error) return onError(error)
this.generateOffer(onOffer)
});
function onOffer(error, sdpOffer)
{
if(error) return onError(error)
kurentoClient(args.ws_uri, function(error, client)
{
if(error) return onError(error);
client.create("MediaPipeline", function(error, _pipeline)
{
if(error) return onError(error);
pipeline = _pipeline;
pipeline.create("WebRtcEndpoint", function(error, webRtc){
if(error) return onError(error);
webRtcEpt = webRtc;
setIceCandidateCallbacks(webRtcPeer, webRtc, onError)
webRtc.processOffer(sdpOffer, function(error, sdpAnswer){
if(error) return onError(error);
webRtcPeer.processAnswer(sdpAnswer, onError);
});
webRtc.gatherCandidates(onError);
webRtc.connect(webRtc, function(error){
if(error) return onError(error);
console.log("Loopback established");
});
});
pipeline.create("RtpEndpoint", function(error, rtp){
if(error) return onError(error);
//setIceCandidateCallbacks2(webRtcPeer, rtp, onError)
var cm_offer = "v=0\n" +
"o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
"s=nginx\n" +
"c=IN IP4 127.0.0.1\n" +
"t=0 0\n" +
"m=audio 60820 RTP/AVP 0\n" +
"a=rtpmap:0 PCMU/8000\n" +
"a=recvonly\n" +
"m=video 59618 RTP/AVP 101\n" +
"a=rtpmap:101 H264/90000\n" +
"a=recvonly\n";
rtp.processOffer(cm_offer, function(error, cm_sdpAnswer){
if(error) return onError(error);
//webRtcPeer.processAnswer(cm_sdpAnswer, onError);
});
//rtp.gatherCandidates(onError);
webRtcEpt.connect(rtp, function(error){
if(error) return onError(error);
console.log("RTP endpoint connected to webRTC");
});
});
});
});
}
});
stopButton.addEventListener("click", stop);
function stop() {
if (webRtcPeer) {
webRtcPeer.dispose();
webRtcPeer = null;
}
if(pipeline){
pipeline.release();
pipeline = null;
}
hideSpinner(videoInput, videoOutput);
}
function onError(error) {
if(error)
{
console.error(error);
stop();
}
}
})
function showSpinner() {
for (var i = 0; i < arguments.length; i++) {
arguments[i].poster = 'img/transparent-1px.png';
arguments[i].style.background = "center transparent url('img/spinner.gif') no-repeat";
}
}
function hideSpinner() {
for (var i = 0; i < arguments.length; i++) {
arguments[i].src = '';
arguments[i].poster = 'img/webrtc.png';
arguments[i].style.background = '';
}
}
/**
* Lightbox utility (to display media pipeline image in a modal dialog)
*/
$(document).delegate('*[data-toggle="lightbox"]', 'click', function(event) {
event.preventDefault();
$(this).ekkoLightbox();
}); -
RTP packets detected as UDP
8 juillet 2024, par fritzHere is what I am trying to do :



WebRTC endpoint > RTP Endpoint > ffmpeg > RTMP server.




This is what my SDP file looks like.



var cm_offer = "v=0\n" +
 "o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
 "s=nginx\n" +
 "c=IN IP4 127.0.0.1\n" +
 "t=0 0\n" +
 "m=audio 60820 RTP/AVP 0\n" +
 "a=rtpmap:0 PCMU/8000\n" +
 "a=recvonly\n" +
 "m=video 59618 RTP/AVP 101\n" +
 "a=rtpmap:101 H264/90000\n" +
 "a=recvonly\n";




What's happening is that wireshark can detect the incoming packets at port 59618, but not as RTP packets but UDP packets. I am trying to capture the packets using ffmpeg with the following command :



ubuntu@ip-132-31-40-100:~$ ffmpeg -i udp://127.0.0.1:59618 -vcodec copy stream.mp4
ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 the FFmpeg developers
 built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
 configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
 libavutil 55. 44.100 / 55. 44.100
 libavcodec 57. 75.100 / 57. 75.100
 libavformat 57. 63.100 / 57. 63.100
 libavdevice 57. 2.100 / 57. 2.100
 libavfilter 6. 69.100 / 6. 69.100
 libavresample 3. 2. 0 / 3. 2. 0
 libswscale 4. 3.101 / 4. 3.101
 libswresample 2. 4.100 / 2. 4.100
 libpostproc 54. 2.100 / 54. 2.100 




All I get is a blinking cursor and The stream.mp4 file is not written to disk after I exit (ctrl+c).



So can you help me figure out :



- 

- why wireshark cannot detect the packets as RTP (I suspect it has something to do with SDP)
- How to handle SDP answer when the RTP endpoint is pushing to ffmpeg which doesn't send an answer back.







Here is the entire code (hello world tutorial modified)



/*
 * (C) Copyright 2014-2015 Kurento (http://kurento.org/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

 function getopts(args, opts)
 {
 var result = opts.default || {};
 args.replace(
 new RegExp("([^?=&]+)(=([^&]*))?", "g"),
 function($0, $1, $2, $3) { result[$1] = decodeURI($3); });

 return result;
 };

 var args = getopts(location.search,
 {
 default:
 {
 ws_uri: 'wss://' + location.hostname + ':8433/kurento',
 ice_servers: undefined
 }
 });

 function setIceCandidateCallbacks(webRtcPeer, webRtcEp, onerror)
 {
 webRtcPeer.on('icecandidate', function(candidate) {
 console.log("Local candidate:",candidate);

 candidate = kurentoClient.getComplexType('IceCandidate')(candidate);

 webRtcEp.addIceCandidate(candidate, onerror)
 });

 webRtcEp.on('OnIceCandidate', function(event) {
 var candidate = event.candidate;

 console.log("Remote candidate:",candidate);

 webRtcPeer.addIceCandidate(candidate, onerror);
 });
 }


 function setIceCandidateCallbacks2(webRtcPeer, rtpEp, onerror)
 {
 webRtcPeer.on('icecandidate', function(candidate) {
 console.log("Localr candidate:",candidate);

 candidate = kurentoClient.getComplexType('IceCandidate')(candidate);

 rtpEp.addIceCandidate(candidate, onerror)
 });
 }


 window.addEventListener('load', function()
 {
 console = new Console();

 var webRtcPeer;
 var pipeline;
 var webRtcEpt;

 var videoInput = document.getElementById('videoInput');
 var videoOutput = document.getElementById('videoOutput');

 var startButton = document.getElementById("start");
 var stopButton = document.getElementById("stop");

 startButton.addEventListener("click", function()
 {
 showSpinner(videoInput, videoOutput);

 var options = {
 localVideo: videoInput,
 remoteVideo: videoOutput
 };


 if (args.ice_servers) {
 console.log("Use ICE servers: " + args.ice_servers);
 options.configuration = {
 iceServers : JSON.parse(args.ice_servers)
 };
 } else {
 console.log("Use freeice")
 }

 webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendrecv(options, function(error)
 {
 if(error) return onError(error)

 this.generateOffer(onOffer)
 });

 function onOffer(error, sdpOffer)
 {
 if(error) return onError(error)

 kurentoClient(args.ws_uri, function(error, client)
 {
 if(error) return onError(error);

 client.create("MediaPipeline", function(error, _pipeline)
 {
 if(error) return onError(error);

 pipeline = _pipeline;

 pipeline.create("WebRtcEndpoint", function(error, webRtc){
 if(error) return onError(error);

 webRtcEpt = webRtc;

 setIceCandidateCallbacks(webRtcPeer, webRtc, onError)

 webRtc.processOffer(sdpOffer, function(error, sdpAnswer){
 if(error) return onError(error);

 webRtcPeer.processAnswer(sdpAnswer, onError);
 });
 webRtc.gatherCandidates(onError);

 webRtc.connect(webRtc, function(error){
 if(error) return onError(error);

 console.log("Loopback established");
 });
 });



 pipeline.create("RtpEndpoint", function(error, rtp){
 if(error) return onError(error);

 //setIceCandidateCallbacks2(webRtcPeer, rtp, onError)


 var cm_offer = "v=0\n" +
 "o=- 3641290734 3641290734 IN IP4 127.0.0.1\n" +
 "s=nginx\n" +
 "c=IN IP4 127.0.0.1\n" +
 "t=0 0\n" +
 "m=audio 60820 RTP/AVP 0\n" +
 "a=rtpmap:0 PCMU/8000\n" +
 "a=recvonly\n" +
 "m=video 59618 RTP/AVP 101\n" +
 "a=rtpmap:101 H264/90000\n" +
 "a=recvonly\n";



 rtp.processOffer(cm_offer, function(error, cm_sdpAnswer){
 if(error) return onError(error);

 //webRtcPeer.processAnswer(cm_sdpAnswer, onError);
 });
 //rtp.gatherCandidates(onError);

 webRtcEpt.connect(rtp, function(error){
 if(error) return onError(error);

 console.log("RTP endpoint connected to webRTC");
 });
 });









 });
 });
 }
 });
 stopButton.addEventListener("click", stop);


 function stop() {
 if (webRtcPeer) {
 webRtcPeer.dispose();
 webRtcPeer = null;
 }

 if(pipeline){
 pipeline.release();
 pipeline = null;
 }

 hideSpinner(videoInput, videoOutput);
 }

 function onError(error) {
 if(error)
 {
 console.error(error);
 stop();
 }
 }
 })


 function showSpinner() {
 for (var i = 0; i < arguments.length; i++) {
 arguments[i].poster = 'img/transparent-1px.png';
 arguments[i].style.background = "center transparent url('img/spinner.gif') no-repeat";
 }
 }

 function hideSpinner() {
 for (var i = 0; i < arguments.length; i++) {
 arguments[i].src = '';
 arguments[i].poster = 'img/webrtc.png';
 arguments[i].style.background = '';
 }
 }

 /**
 * Lightbox utility (to display media pipeline image in a modal dialog)
 */
 $(document).delegate('*[data-toggle="lightbox"]', 'click', function(event) {
 event.preventDefault();
 $(this).ekkoLightbox();
 });