palava Encrypted P2P-Videoconferences on the web Marius Melzer – Encrypted P2P-Videoconferences on the web – Marius Melzer
palava Encrypted P2P-Videoconferences on the web Marius Melzer – Encrypted P2P-Videoconferences on the web – Marius Melzer
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talk-webmontag
On Github palavatv / talk-webmontag
palava
Encrypted P2P-Videoconferences on the web
Marius Melzer
WebRTC
new web standard (currently in firefox & chrome)
allows p2p-connections between browsers ...
... and video/audio streams on top
<video id="gum-video" autoplay="autoplay">
<script>
navigator.webkitGetUserMedia(
{video: true, audio: false},
function(stream) {
document.getElementById('gum-video').src =
webkitURL.createObjectURL(stream);
}
);
</script>
</video>
P2P connection requirements
Initialisation over signaling server
Exchange of streaming properties over SDP
NAT traversal via ICE (STUN server)
Interop problems & workarounds
Signaling
palava software stack
completely free & open source
palava machine
our "tracker"
room & signaling server
palava client
webrtc wrapper library for video conferencing
palava portal
web plattform using the palava client
Signaling Protocol
A few defined JSON messages
Client → Server
join_room(room_id, status)
send_to_peer(peer_id, data)
update_status(status)
Server → Client
joined_room(me, peers)
peer_updated_status(peer_id, peer_status)
error(id, message)
shutdown(seconds)
Client → Client
via send_to_peer
offer(sdp)
answer(sdp)
ice_candidate(...)