ACTION-191: Send pre-LC editorial comments on system-info and camera/Media Capture

Send pre-LC editorial comments on system-info and camera/Media Capture

State:
closed
Person:
James Salsman
Due on:
June 16, 2010
Created on:
June 9, 2010
Associated Product:
System Information and Events API
Related emails:
  1. Re: Agenda - Distributed Meeting 2011-03-30 (from Frederick.Hirsch@nokia.com on 2011-03-30)
  2. Re: Agenda - Distributed Meeting 2011-03-30 (from rich.tibbett@gmail.com on 2011-03-30)
  3. RE: Agenda - Distributed Meeting 2011-03-30 (from dzung.d.tran@intel.com on 2011-03-29)
  4. RE: Agenda - Distributed Meeting 2011-03-30 (from dzung.d.tran@intel.com on 2011-03-29)
  5. Regrets (was RE: Agenda - Distributed Meeting 2011-03-30) (from schitturi@rim.com on 2011-03-29)
  6. Agenda - Distributed Meeting 2011-03-30 (from Frederick.Hirsch@nokia.com on 2011-03-29)
  7. Re: Agenda - Distributed Meeting 2010-12-14 (from jmorris@cdt.org on 2010-12-15)
  8. Re: Agenda - Distributed Meeting 2010-12-14 (from huntc@internode.on.net on 2010-12-15)
  9. Re: Agenda - Distributed Meeting 2010-12-14 (from marco.marengo@telecomitalia.it on 2010-12-15)
  10. Re: Agenda - Distributed Meeting 2010-12-14 (from tlr@w3.org on 2010-12-15)
  11. RE: Agenda - Distributed Meeting 2010-12-14 (from Claes1.Nilsson@sonyericsson.com on 2010-12-15)
  12. RE: Agenda - Distributed Meeting 2010-12-14 (from schitturi@rim.com on 2010-12-14)
  13. Agenda - Distributed Meeting 2010-12-14 (from Frederick.Hirsch@nokia.com on 2010-12-14)
  14. SysInfo Status and Next Steps (from Frederick.Hirsch@nokia.com on 2010-08-02)
  15. Re: CfC: System Information API LC (from jsalsman@talknicer.com on 2010-07-14)
  16. Fwd: changes to sysinfo (was Fwd: Agenda - Distributed Meeting 2010-06-23) (from jsalsman@talknicer.com on 2010-06-28)
  17. 2009/dap/camera Overview.html,1.64,1.65 (from cvsmail@w3.org on 2010-06-24)
  18. Re: Agenda - Distributed Meeting 2010-06-23 (from jsalsman@talknicer.com on 2010-06-23)
  19. Re: system information draft status (from jsalsman@talknicer.com on 2010-06-16)
  20. Re: Agenda - Distributed Meeting 2010-06-16 (from jmorris@cdt.org on 2010-06-16)
  21. Agenda - Distributed Meeting 2010-06-16 (from Frederick.Hirsch@nokia.com on 2010-06-16)
  22. Re: Agenda - Distributed Meeting 2010-06-16 (from enewland@cdt.org on 2010-06-15)
  23. Re: Draft minutes 2010-06-09 (from Frederick.Hirsch@nokia.com on 2010-06-10)
  24. Draft minutes 2010-06-09 (from robin@robineko.com on 2010-06-09)

Related notes:

http://dev.w3.org/2009/dap/system-info/#audio-and-video-codecs

http://dev.w3.org/2009/dap/system-info/#idl-def-AudioDeviceAttributes

http://dev.w3.org/2009/dap/system-info/#idl-def-MicrophoneAttributes

http://dev.w3.org/2009/dap/system-info/#idl-def-CameraAttributes

-- all need parameters for audio/x-speex (quality and bitrate), as well as video/x-webm, audio/ogg, and video/ogg with bitrate, etc. along the lines of http://dev.w3.org/2009/dap/camera/#formatdata

James Salsman, 9 Jun 2010, 15:08:04

Can we add ;source={microphone,camera,camcorder} to the MIME type parameters to follow the announced practice of Android and Firefox developers?

James Salsman, 14 Jun 2010, 02:49:23

AudioCodecAttributes contains "compFormat" -- http://dev.w3.org/2009/dap/system-info/#widl-AudioCodecAttributes-compFormat -- while the VideoCodecAttributes contains "compFormats". Those should both be plural as "attribute DOMString[] compFormats;" and they should be space-separated lists of MIME types, not free form.

The declaration above http://dev.w3.org/2009/dap/system-info/#widl-VideoCodecAttributes-hwAccel should also be pluralized with "attribute boolean[] hwAccel;" instead of omitting the "[]".

Under http://dev.w3.org/2009/dap/system-info/#idl-def-MicrophoneAttributes there needs to be a "name" attribute with values such as "microphone", "camcorder", "webcam", or "line-in" (suitable for use as a ;source=name type parameter in input elements for forms, e.g., input type=file accept="audio/x-speex;quality=7;bitrate=16000;source=webcam") and a "types" attribute (not to be confused with the existing "type" enumerated attribute) as a space-separated list of available MIME types such as "audio/x-speex audio/ogg" to go along with with the frequency ranges already in the draft.

Similarly, http://dev.w3.org/2009/dap/system-info/#idl-def-CameraAttributes needs to include attributes "name" and "types" such as "camera" and "image/png video/x-webm ..." respectively.

Finally, regarding the Media Capture API, per ISSUE-85 it is not appropriate for http://dev.w3.org/2009/dap/camera/#widl-FormatData-type to refer to "audio/x-wav" which is a union type with multiple serious drawbacks. Please replace it with "audio/x-speex or audio/ogg" which are unencumbered types of appropriate quality.

James Salsman, 14 Jun 2010, 08:05:03

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Anssi Kostiainen <anssi.kostiainen@intel.com>, Reilly Grant <reillyg@google.com>, Chairs, Fuqiao Xue <xfq@w3.org>, Staff Contact
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