Re: New version of Editor's Draft

On 04/28/2012 10:29 AM, William Lin wrote:
> look forward to this recorder proposal.
> one question,  will recorder be a html5 tag similar to <video>,<audio> 
> and can be used independent of  Media Caputure or just part of Media 
> Capature to work for record MediaStream? thanks

Since we don't have a proposal yet, the field is really wide open!

A couple of things the proposal has to satisfy:

- It has to be easy to see how to make it take a MediaStream as input 
(of course)
- It has to make it easy to generate a file (either by taking a file 
destination as a parameter or by offering a Blob interface where people 
can pick out the encoded data)
- It has to be able to record for a very long time without running out 
of memory (no infinite buffer)
- It has to generate its data in a completely well defined form (for 
instance, it must be possible for the caller to figure out whether a 
WEBM file with VP8, an AVI file with H.263 or some proprietary format 
will be generated)

The last point was really my biggest objection to the previoius proposal 
for such an interface.

These requirements are not well captured (sic) yet.

>
> On Sat, Apr 28, 2012 at 3:21 PM, Anant Narayanan <anant@mozilla.com 
> <mailto:anant@mozilla.com>> wrote:
>
>     On 4/27/12 7:09 PM, William Lin wrote:
>
>         Seems MediaStreamRecorder is removed. And all the function
>         record()
>         related is removed too.
>         No clear the story of how was this decision made.
>         Or in next step, recorder will be added?
>
>
>     I apologize, I didn't mention in my earlier email that the other
>     change was the removal of MediaStreamRecorder. We've been talking
>     on the list about removing it for a while now - once we have a new
>     proposal we'll be adding something similar to the spec.
>
>     The main problem with the old MediaStreamRecorder was that it was
>     defined in terms of a MediaStream, but it seems more desirable to
>     have such a recorder work directly with the outputs of a
>     MediaStream, such as <video>, <audio>, or even <canvas>. One of my
>     TODO items is to come up with such a proposal, which I will do as
>     soon as possible!
>
>     Thanks,
>     -Anant
>
>         On Sat, Apr 28, 2012 at 2:36 AM, Anant Narayanan
>         <anant@mozilla.com <mailto:anant@mozilla.com>
>         <mailto:anant@mozilla.com <mailto:anant@mozilla.com>>> wrote:
>
>            Hi all,
>
>            I just committed a new version of the editor's draft for the
>            getUserMedia specification, you can find it at the usual place:
>         http://dev.w3.org/2011/webrtc/__editor/getusermedia.html
>
>         <http://dev.w3.org/2011/webrtc/editor/getusermedia.html>
>
>            The big change for this version was moving the MediaStream
>            definition from the PeerConnection document.
>
>            Please send your feedback and comments to the list.
>
>            Thanks,
>            -Anant
>
>
>
>
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>