ISSUE-101: Should we define a default audio (video?) codec for capture? if so, which?

default-codec

Should we define a default audio (video?) codec for capture? if so, which?

State:
CLOSED
Product:
Capture API
Raised by:
James Salsman
Opened on:
2010-09-01
Description:
Does anyone object to form input type=file
accept="audio/*;capture=microphone" using Speex as a default, as if it
were specified
accept="audio/x-speex;quality=7;bitrate=16000;capture=microphone" or
to allowing the requesting of different speex qualities and bitrates
using those mime type parameters? Speex at quality=7 is a reasonable
open source default audio vocoder.
Runner-up alternatives would include audio/ogg, which is a higher
bandwidth format appropriate for multiple speakers or polyphonic
music; audio/mpeg, a popular but encumbered format; audio/wav, a union
of several different sound file formats, some of which are encumbered; etc.
Related Actions Items:
Related emails:
  1. RE: Agenda - Distributed Meeting 2011-04-06 (from niklas.widell@ericsson.com on 2011-04-06)
  2. RE: Agenda - Distributed Meeting 2011-04-06 (from cecile.marc@orange-ftgroup.com on 2011-04-06)
  3. Regrets: Agenda - Distributed Meeting 2011-04-06 (from jmorris@cdt.org on 2011-04-05)
  4. Agenda - Distributed Meeting 2011-04-06 (from Frederick.Hirsch@nokia.com on 2011-04-05)
  5. Agenda - Distributed Meeting 2010-09-22 (from Frederick.Hirsch@nokia.com on 2010-09-21)
  6. Re: CfC: The Media Capture API FPWD (from pgladstone@cisco.com on 2010-09-03)
  7. Re: The Media Capture API FPWD (from blsaws@gmail.com on 2010-09-02)
  8. Re: The Media Capture API FPWD (from blsaws@gmail.com on 2010-09-02)
  9. Re: The Media Capture API FPWD (from blsaws@gmail.com on 2010-09-02)
  10. CfC: The Media Capture API FPWD (from Frederick.Hirsch@nokia.com on 2010-09-01)
  11. ISSUE-101: Should we define a default audio (video?) codec for capture? if so, which? (from sysbot+tracker@w3.org on 2010-09-01)

Related notes:

[dom]: would need a royaltee-free codec, already widely deployed in browsers

1 Sep 2010, 14:42:45

[fjh]: http://lists.w3.org/Archives/Public/public-device-apis/2010Aug/0102.html

1 Sep 2010, 14:44:21

Dom, that issue reduces to the question of what is "a" codec (as opposed to the multiple union set of codecs in audio/wav); for a small memory footprint open source vocoder like Speex, what are the advantages to wide deployment over low bandwidth (unlike audio/ogg), free (unlike mp3), or well-specified (unlike audio/wav)?

Please see http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2010-August/028311.html

One reply so far: http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2010-August/028324.html

My response: http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2010-September/028337.html

James Salsman, 1 Sep 2010, 16:24:15

A default audiovisual codec has not yet been specified either, but there
was recently some progress announced in the news on that topic:
http://www.businesswire.com/news/home/20100825006629/en

James Salsman, 1 Sep 2010, 16:49:29

[fjh]: hopefully codec will be defined by rtw

15 Mar 2011, 07:47:41

[dom]: rtw = Web RTC

15 Mar 2011, 07:47:54

[fjh]: discussed at F2F, agreed to not specify codec in DAP

6 Apr 2011, 15:04:15

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