WebRTC-Streamer

Experimentation to stream WebRTC media sources like capture devices, screen capture, mkv files and RMTP/RTSP sources using simple signaling mechanism (see api). It is also compatible with WHEP interface.

*** Notice *** Live demo are stopped till I migrate to a european web hosting.

Artefacts

• packages are available from https://github.com/mpromonet/webrtc-streamer/releases/latest
• container image are available from https://hub.docker.com/r/mpromonet/webrtc-streamer

Usage

Usage:
  ./webrtc-streamer [OPTION...] [urls...]

 General options:
  -h, --help        Print help
  -V, --version     Print version
  -v, --verbose     Verbosity level (use multiple times for more verbosity)
  -C, --config arg  Load urls from JSON config file
  -n, --name arg    Register a stream with name
  -u, --video arg   Video URL for the named stream
  -U, --audio arg   Audio URL for the named stream

 HTTP options:
  -H, --http arg        HTTP server binding (default 0.0.0.0:8000)
  -w, --webroot arg     Path to get static files
  -c, --cert arg        Path to private key and certificate for HTTPS
  -N, --threads arg     Number of threads for HTTP server
  -A, --passwd arg      Password file for HTTP server access
  -D, --domain arg      Authentication domain for HTTP server access
                        (default:mydomain.com)
  -X, --disable-xframe  Disable X-Frame-Options header
  -B, --base-path arg   Base path for HTTP server

 WebRTC options:
  -m, --maxpc arg               Maximum number of peer connections
  -I, --ice-transport arg       Set ice transport type
  -T, --turn-server [=arg(=turn:turn@0.0.0.0:3478)]
                                Start embedded TURN server
  -t, --turn arg                Use an external TURN relay server
  -S, --stun-server [=arg(=0.0.0.0:3478)]
                                Start embedded STUN server bind to address
  -s, --stun [=arg(=0.0.0.0:3478)]
                                Use an external STUN server
  -R, --udp-range arg           Set the webrtc udp port range
  -W, --trials arg              Set the webrtc trials fields
  -a, --audio-layer [=arg(=)]   Specify audio capture layer to use (omit
                                value for dummy audio)
  -q, --publish-filter arg      Specify publish filter
  -o, --null-codec              Use null codec (keep frame encoded)
  -b, --plan-b                  Use sdp plan-B (default use unifiedPlan)

Arguments of '-H' are forwarded to option listening_ports of civetweb, allowing use of the civetweb syntax like -H8000,9000 or -H8080r,8443s.

Using -o allows storing compressed frame data from the backend stream using webrtc::VideoFrameBuffer::Type::kNative. This hacks the stucture webrtc::VideoFrameBuffer storing data in a override of the i420 buffer. This allows forwarding H264 frames from V4L2 device or RTSP stream to WebRTC stream. It uses less CPU, but has less features (resize, codec, and bandwidth are disabled).

Options for the WebRTC stream name:

• an alias defined using -n argument then the corresponding -u argument will be used to create the capturer
• an "rtsp://" url that will be opened using an RTSP capturer based on live555
• an "file://" url that will be opened using an MKV capturer based on live555
• an "rmtp://" url that will be opened using an RMTP capturer based on librmtp
• an "screen://" url that will be opened by webrtc::DesktopCapturer::CreateScreenCapturer
• an "window://" url that will be opened by webrtc::DesktopCapturer::CreateWindowCapturer
• an "v4l2://" url that will capture H264 frames and store it using webrtc::VideoFrameBuffer::Type::kNative type (not supported on Windows)
• an "videocap://" url video capture device name
• an "audiocap://" url audio capture device name

Examples

./webrtc-streamer -C config.json

Live Demo

We can access to the WebRTC stream using webrtcstreamer.html. For instance:

• webrtcstreamer.html?rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov
• webrtcstreamer.html?Bunny

An example displaying grid of WebRTC Streams is available using option layout=<lines>x<columns>

Live Demo

Using docker image

You can start the application using the docker image:

docker run -p 8000:8000 -it mpromonet/webrtc-streamer

You can expose V4L2 devices from your host using:

docker run --device=/dev/video0 -p 8000:8000 -it mpromonet/webrtc-streamer

The container entry point is the webrtc-streamer application, then you can:

• view all commands

  docker run -p 8000:8000 -it mpromonet/webrtc-streamer --help

• run the container registering a RTSP url:

  docker run -p 8000:8000 -it mpromonet/webrtc-streamer -n raspicam -u rtsp://pi2.local:8554/unicast

• run the container giving config.json file:

  docker run -p 8000:8000 -v $PWD/config.json:/usr/local/share/webrtc-streamer/config.json mpromonet/webrtc-streamer

• run the container using network host:

  docker run --net host mpromonet/webrtc-streamer

Using embedded STUN/TURN server behind a NAT

It is possible to start an embeded STUN and TURN server and publish its URL:

./webrtc-streamer --stun-server=0.0.0.0:3478 --stun=$(curl -s ifconfig.me):3478
./webrtc-streamer --stun=- --turn-server=0.0.0.0:3478 -tturn:turn@$(curl -s ifconfig.me):3478
./webrtc-streamer --stun-server=0.0.0.0:3478 --stun=$(curl -s ifconfig.me):3478 --turn-server=0.0.0.0:3479 --turn=turn:turn@$(curl -s ifconfig.me):3479

The command curl -s ifconfig.me is getting the public IP, it could also given as a static parameter.

In order to configure the NAT rules using the upnp feature of the router, it is possible to use upnpc like this:

upnpc -r 8000 tcp 3478 tcp 3478 udp

Adapting with the HTTP port, STUN port, TURN port.

HTML Embedding

Instead of using the internal HTTP server, it is easy to display a WebRTC stream in a HTML page served by another HTTP server. The URL of the WebRTC-streamer to use should be given creating the WebRtcStreamer instance:

var webRtcServer = new WebRtcStreamer(<video tag>, <webrtc-streamer url>);

A short sample HTML page using webrtc-streamer running locally on port 8000:

<html>
<head>
<script src="libs/adapter.min.js" ></script>
<script src="webrtcstreamer.js" ></script>
<script>        
	var webRtcServer      = null;
	window.onload         = function() { 
		webRtcServer      = new WebRtcStreamer("video",location.protocol+"//"+location.hostname+":8000");
		webRtcServer.connect("rtsp://196.21.92.82/axis-media/media.amp","", "rtptransport=tcp&timeout=60");
	}
	window.onbeforeunload = function() { webRtcServer.disconnect(); }
</script>
</head>
<body> 
	<video id="video" muted playsinline />
</body>
</html>

Using WebComponents

WebRTC-streamer provides its own Web Components as an alternative way to display a WebRTC stream in an HTML page. For example:

<html>
<head>
	<script type="module" src="webrtc-streamer-element.js"></script>
</head>
<body>
	<webrtc-streamer url="rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov"></webrtc-streamer>
</body>
</html>

Live Demo

Using the webcomponent with a stream selector:

Live Demo

Using the webcomponent over google map:

Live Demo

Using WHEP

It allow to stream using draft standard WHEP

WebRTC player can display WebRTC stream from webrtc-streamer.

A minimal example:

<html>
<head>
    <script src="https://unpkg.com/@eyevinn/whep-video-component@latest/dist/whep-video.component.js"></script>
</head>
<body>
    <whep-video id="video" muted autoplay></whep-video>
    <script>
        video.setAttribute('src', `${location.origin}/api/whep?url=Asahi&options=rtptransport%3dtcp%26timeout%3d60`);
    </script>
</body>
</html>

Live Demo

Object detection using tensorflow.js

Live Demo

Connect to Janus Gateway Video Room

A simple way to publish WebRTC stream to a Janus Gateway Video Room is to use the JanusVideoRoom interface

var janus = new JanusVideoRoom(<janus url>, <webrtc-streamer url>)

A short sample to publish WebRTC streams to Janus Video Room could be:

<html>
<head>
<script src="janusvideoroom.js" ></script>
<script>        
	var janus = new JanusVideoRoom("https://janus.conf.meetecho.com/janus", null);
	janus.join(1234, "rtsp://pi2.local:8554/unicast","pi2");
	janus.join(1234, "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov","media");	    
</script>
</head>
</html>

Live Demo

This way the communication between Janus API and WebRTC Streamer API is implemented in Javascript running in browser.

The same logic could be implemented in NodeJS using the same JS API:

global.request = require("then-request");
var JanusVideoRoom = require("./html/janusvideoroom.js");
var janus = new JanusVideoRoom(
  "http://192.168.0.15:8088/janus",
  "http://192.168.0.15:8000",
);
janus.join(1234, "videocap://0", "video");

Connect to Jitsi

A simple way to publish WebRTC stream to a Jitsi Video Room is to use the XMPPVideoRoom interface

var xmpp = new XMPPVideoRoom(<xmpp server url>, <webrtc-streamer url>)

A short sample to publish WebRTC streams to a Jitsi Video Room could be:

<html>
<head>
<script src="libs/strophe.min.js" ></script>
<script src="libs/strophe.muc.min.js" ></script>
<script src="libs/strophe.disco.min.js" ></script>
<script src="libs/strophe.jingle.sdp.js"></script>
<script src="libs/jquery-3.5.1.min.js"></script>
<script src="xmppvideoroom.js" ></script>
<script>        
	var xmpp = new XMPPVideoRoom("meet.jit.si", null);
	xmpp.join("testroom", "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov","Bunny");	    
</script>
</head>
</html>

Live Demo

Dependencies

This package depends on the following packages:

• WebRTC Native Code Package for WebRTC (see license https://webrtc.github.io/webrtc-org/license)
• civetweb HTTP server for HTTP server (see license https://github.com/civetweb/civetweb/blob/master/LICENSE.md)
• live555 for RTSP/MKV source (see license http://www.live555.com/liveMedia/faq.html#copyright-and-license)

Build

The following steps are required to build the project, and will install the dependencies above:

1. Install the Chromium depot tools

   pushd ..
   git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
   export PATH=$PATH:`realpath depot_tools`
   popd

2. Download WebRTC

   mkdir ../webrtc
   pushd ../webrtc
   fetch webrtc 
   popd

3. Build WebRTC Streamer

   cmake . && make

It is possible to specify cmake parameters WEBRTCROOT & WEBRTCDESKTOPCAPTURE:

• $WEBRTCROOT/src should contains source (default is $(pwd)/../webrtc)
• WEBRTCDESKTOPCAPTURE enabling desktop capture if available (default is ON)

Pipelines

There is pipelines on CircleCI, CirrusCI, or GitHub CI, for the following architectures:

• x86_64 on Ubuntu
• armv7 crosscompiled (this build is running on Raspberry Pi2 and NanoPi NEO)
• armv6+vfp crosscompiled (this build is running on Raspberry PiB and should run on a Raspberry Zero)
• arm64 crosscompiled
• Windows x64 build with clang
• MacOS

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