Baresip WebRTC Demo
-
Install libre and librem
-
Install baresip dev:
$ sudo make install install-dev -C ../baresip
- Compile this project:
cmake . && make
- Start it:
$ ./baresip-webrtc -i stun:stun.l.google.com:19302
Local network addresses:
en0: 172.20.10.3
medianat: ice
mediaenc: dtls_srtp
aucodec: opus/48000/2
aucodec: G722/16000/1
aucodec: PCMU/8000/1
aucodec: PCMA/8000/1
ausrc: ausine
vidcodec: H264
vidcodec: H264
vidcodec: H263
vidcodec: H265
avcodec: using H.264 encoder 'libx264' -- libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
avcodec: using H.264 decoder 'h264' -- H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
avcodec: using H.265 encoder 'libx265' -- libx265 H.265 / HEVC
avcodec: using H.265 decoder 'hevc' -- HEVC (High Efficiency Video Coding)
vidcodec: VP8
vidcodec: VP9
ausrc: avformat
vidsrc: avformat
vidisp: sdl
vidsrc: fakevideo
vidisp: fakevideo
demo: listening on:
http://172.20.10.3:9000/
https://172.20.10.3:9001/
- Open this URL in Chrome and follow the instructions:
http://localhost:9000/
This diagram shows how a WebRTC capable browser can connect to baresip-webrtc. Baresip-WebRTC has a small embedded HTTP(S) Server for serving JavaScript files and for signaling.
The media stream is compatible with WebRTC, using ICE and DTLS/SRTP as media transport. The audio codecs are Opus, G722 or G711. The video codecs are VP8, H264.
(Signaling)
.----------. SDP/HTTP .-----------.
| Browser |<-------------------->| Baresip |
| (Chrome) | | WebRTC |<==== A/V Backend
| |<====================>| |
'----------' ICE/DTLS/SRTP '-----------'
(Audio,Video)
| WebRTC: | this: |
|---|---|
| MediaStream | n/a |
| MediaStreamTrack | struct media_track |
| RTCConfiguration | struct rtc_configuration |
| RTCPeerConnection | struct peer_connection |
| RTCSessionDescription | struct session_description |
| RTCRtpTransceiver | struct stream |
.------. .------.
|Client| |Server|
'------' '------'
| HTTP POST |
+--------------------------------------->+
| 201 Created (SDP offer) |
+<---------------------------------------+
| |
| |
| HTTP PUT (SDP Answer) |
+--------------------------------------->+
| 200 OK |
+<---------------------------------------+
| |
| |
| HTTP PATCH (ICE Candidate) |
+--------------------------------------->+
| 200 OK |
+<---------------------------------------+
| |
| |
| |
| ICE REQUEST |
<========================================>
| ICE RESPONSE |
<========================================>
| DTLS SETUP |
<========================================>
| RTP/RTCP FLOW |
<========================================>
| |
| |
| |
| |
| HTTP DELETE |
+--------------------------------------->+
| 200 OK |
<----------------------------------------+
https://www.ietf.org/archive/id/draft-ietf-wish-whip-03.html
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