On 3/28/13 20:45, Michael Heuberger wrote:
Thanks Adam
So you're saying that it should be possible? If so:
- where can I see some examples?
- what function must be called to send the video to the server?
While I can't point you to any ready-made examples off the top of my
head (although I suspect they exist), the general information flow for
real-time server-based recording of a media stream would be something
along the lines of:
1. Browser retrieves a webpage with javascript in it.
2. Browser executes javascript, which:
1. Gets a handle to the camera using getUserMedia,
2. Creates an RTCPeerConnection
3. Calls "createOffer" and "setLocalDescription" on the
RTCPeerConnection
4. Sends an request to the server containing the offer (in SDP format)
3. The server processes the offer SDP and generates its own answer SDP,
which it returns to the browser in its response.
4. The javascript calls "setRemoteDescription" on the RTCPeerConnection
to start the media flowing.
5. The server starts receiving DTLS/SRTP packets from the browser,
which it then does whatever it wants to, up to and including storing
in an easily readable format on a local hard drive.
Clearly, I've glossed over the details, but I hope that's enough to get
you in the right direction with a little more research on your end.
- do Mozilla and Chrome use different video codecs for the same
implementation?
Presently, both Mozilla and Chrome use VP8 for their video codec.
I am also confused, what's the difference between RTCWEB and WebRTC?
The standardization effort to enable real-time communications in web
browsers is a cross-organizational endeavor, with the
javascript-to-browser interface being defined in the W3C's "WebRTC"
working group, and the browser-to-network interface being defined in the
IETF's "RTCWEB" working group.
The term "WebRTC" is used in the press to refer to both halves of the
effort. You won't generally see "RTCWEB" unless someone is making a
specific reference to the IETF working group.
--
Adam Roach
Principal Platform Engineer
[email protected]
+1 650 903 0800 x863
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