Re: What does MediaStreamRecorder.getRecordedData() actually return?

     Ah! Thanks for the clarification.

     One question down, 2 to go :)

Gili

On 11/09/2013 5:04 PM, Travis Leithead wrote:
>
> To get data out of a Blob, you can use the FileReader (generally for 
> all Blobs): http://dev.w3.org/2006/webapi/FileAPI/#FileReader-interface
>
> There's no need to sub-class to File to use FileReader to read a blob.
>
> *From:*cowwoc [mailto:cowwoc@bbs.darktech.org]
> *Sent:* Wednesday, September 11, 2013 1:34 PM
> *To:* Adam Bergkvist
> *Cc:* public-media-capture@w3.org
> *Subject:* Re: What does MediaStreamRecorder.getRecordedData() 
> actually return?
>
> On 11/09/2013 5:57 AM, Adam Bergkvist wrote:
>
>     On 2013-09-11 06:54, cowwoc wrote:
>
>         Hi,
>
>         http://dev.w3.org/2011/webrtc/editor/webrtc-20111004.html#dom-mediastreamrecorder-getrecordeddata
>
>         reads:
>
>
>     You're looking at a really old version (2011-10-04) of the spec.
>
>     The MediaStream recording stuff has been moved to a dedicated spec
>     [1].
>
>     /Adam
>
>     [1]
>     https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/MediaRecorder.html
>
>
> Thanks, but this only answers my last question. The rest of the 
> questions still hold:
>
>  1. It's not clear (to me at least) whether the data being returned
>     consists of the compressed WebM audio+video (muxed) data or
>     something else. Perhaps the document should be more explicit?
>  2. In the case of the incoming MediaStream I can see the browser
>     having no problem returning a compressed stream, but does this
>     imply that the outgoing MediaStream must compress the audio+video
>     before passing it into the recorder? This implies that localhost
>     recording app (without a remote end) is more expensive than it
>     needs to me. Certainly this is an edge-case, but it's worth
>     considering.
>
>     Looking at 
> https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/MediaRecorder.html#blob-event 
> <https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/MediaRecorder.html#blob-event> 
> the API returns a Blob but looking at 
> http://www.w3.org/TR/2009/WD-FileAPI-20091117/#dfn-Blob 
> <http://www.w3.org/TR/2009/WD-FileAPI-20091117/#dfn-Blob> there is no 
> way to get bytes out of a Blob. I believe the API is supposed to refer 
> to a subclass (e.g. File) which allows us to read the bytes (e.g. 
> using FileReader). Shouldn't the recorder API exposes a sub-class?
>
> Gili
>