15:07:56 <RRSAgent> RRSAgent has joined #html-media
15:07:56 <RRSAgent> logging to http://www.w3.org/2013/03/26-html-media-irc
15:07:58 <trackbot> RRSAgent, make logs public
15:08:00 <trackbot> Zakim, this will be 63342
15:08:00 <Zakim> ok, trackbot; I see HTML_WG()11:00AM scheduled to start 8 minutes ago
15:08:01 <trackbot> Meeting: HTML Media Task Force Teleconference
15:08:01 <trackbot> Date: 26 March 2013
15:08:08 <johnsim> zakim, who is on the phone?
15:08:08 <Zakim> I notice HTML_WG()11:00AM has restarted
15:08:09 <Zakim> On the phone I see glenn, johnsim, Bin, [IPcaller], ddorwin, pladd, joesteele, Plh, markw, +1.425.868.aacc, MartinSoukup, BobLund, adrianba
15:08:10 <Zakim> +Aaron_Colwell
15:08:16 <Zakim> +pal
15:08:20 <adrianba> Agenda: http://lists.w3.org/Archives/Public/public-html-media/2013Mar/0064.html
15:08:24 <pal> pal has joined #html-media
15:08:25 <Zakim> +??P39
15:08:26 <plh> scribe: plh
15:08:33 <Zakim> -markw
15:09:02 <johnsim> zakim, who is on the phone?
15:09:02 <Zakim> On the phone I see glenn, johnsim, Bin, [IPcaller], ddorwin, pladd, joesteele, Plh (muted), +1.425.868.aacc, MartinSoukup, BobLund, adrianba, Aaron_Colwell, pal, ??P39
15:09:19 <Zakim> +??P9
15:09:39 <adrianba> zakim, aacc is jdsmith
15:09:39 <Zakim> +jdsmith; got it
15:09:40 <markw> Zakim, +??P9 is me
15:09:41 <Zakim> sorry, markw, I do not recognize a party named '+??P9'
15:09:47 <plh> Present+ Henri
15:09:52 <markw> Zakim, ??P9 is me
15:09:52 <Zakim> +markw; got it
15:10:01 <adrianba> zakim, who is on the phone?
15:10:01 <Zakim> On the phone I see glenn, johnsim, Bin, [IPcaller], ddorwin, pladd, joesteele, Plh (muted), jdsmith, MartinSoukup, BobLund, adrianba, Aaron_Colwell, pal, ??P39, markw
15:10:31 <johnsim> zakim, ??3P9 is  markw
15:10:31 <Zakim> sorry, johnsim, I do not recognize a party named '??3P9'
15:10:37 <plh> Topic: previous minutes
15:10:43 <plh> http://www.w3.org/2013/03/12-html-media-minutes.html
15:10:44 <johnsim> zakim, ??P39 is markw
15:10:44 <Zakim> +markw; got it
15:10:51 <plh> minutes are approved
15:10:59 <plh> Topic: Action items
15:11:10 <plh> https://www.w3.org/html/wg/media/track/actions/10
15:11:13 <Zakim> + +1.720.279.aadd
15:11:16 <plh> action-10?
15:11:16 <trackbot> ACTION-10 -- Adrian Bateman to discuss bug 19208 with johnsim -- due 2013-04-08 -- OPEN
15:11:16 <trackbot> http://www.w3.org/html/wg/media/track/actions/10
15:11:21 <glenn> zakim, [IPCaller] is hsivonen
15:11:21 <Zakim> +hsivonen; got it
15:12:11 <plh> https://www.w3.org/Bugs/Public/show_bug.cgi?id=19208
15:12:17 <plh> Keymessage event not needed when Key System already has Key
15:12:19 <adrianba> Keymessage event not needed when Key System already has Key
15:12:32 <plh> Adrian: John and I talked about it last week
15:12:38 <plh> ... need a bit more time
15:13:00 <plh> ... the proposal we'll make is related to a discussion we had a few weeks ago avbout the lifetime of a session
15:13:10 <plh> ... there are some suggestions we want to make about session management
15:13:17 <plh> ... different from what the spec is suggesting at the momnet
15:13:18 <joesteele> +q
15:13:28 <plh> ... so we'll need to come back on this
15:13:31 <plh> ack joe
15:13:49 <plh> Joe: I did update a related bug...
15:13:58 <plh> ... [never mind]
15:14:03 <joesteele> -q
15:14:24 <plh> Topic: Baseline documents
15:14:30 <plh> Adrian: those are just links
15:14:47 <plh> ... no update since the previous discussion
15:15:22 <jasonlforbes> jasonlforbes has joined #html-media
15:15:32 <plh> ... not sure where the Chairs are at for the moment
15:15:40 <plh> ... waiting on feeback from Paul
15:15:57 <plh> plh: I don't know the status from the Chairs point of view either
15:16:13 <plh> Topic: Progression to FPWD
15:16:17 <plh> Adrian: see above
15:16:31 <plh> Topic: Discussion of outstanding bugs
15:16:38 <plh> http://tinyurl.com/7tfambo
15:16:38 <adrianba> http://lists.w3.org/Archives/Public/public-html-media/2013Mar/0070.html
15:16:46 <plh> Adrian: David made a proposal
15:17:26 <adrianba> https://www.w3.org/Bugs/Public/show_bug.cgi?id=20622
15:17:30 <plh> https://www.w3.org/Bugs/Public/show_bug.cgi?id=20622
15:17:36 <adrianba> SessionID may be assigned asynchronously in MediaKeys.createSession
15:18:01 <plh> Mark: we already have a mention that the sessionID may be assigned by the CDM
15:18:14 <plh> ... we want it to be async
15:18:35 <plh> ... so the sessionId might not be assigned when the MediaKeySession
15:18:45 <plh> ... you'll get it on the first event instead
15:18:55 <MartinSoukup> +1 to require assignment of session ID prior to event firing
15:19:07 <plh> ?: is there proposed language?
15:19:12 <plh> Mark: not yet
15:19:39 <adrianba> s/?/johnsim/
15:19:54 <glenn> s/when the MediaKeySession/when the MediaKeys.createSession returns/
15:19:59 <plh> Martin: I understand that the proposal that the sessionId might be assigned before the first event
15:20:02 <plh> Mark: that's right
15:20:33 <plh> Adrian: this might be related that John and I have an action on
15:20:55 <plh> ... if you already have the information about the keys in the init state, that might have an impact on when the sessionId gets set
15:21:12 <ddorwin> q+
15:21:15 <plh> Mark: right, you want to do that async. the spec implies otherwise at the moment
15:21:22 <plh> ack dd
15:21:58 <plh> David: if we do go to reusing sessions, then we would already have the info.
15:22:12 <plh> Adrian: should there be a serie of events that fire before the progress event
15:22:18 <plh> ... that reuse MSE
15:22:34 <plh> ... we could have an event that fires that says that the session is open and running
15:23:00 <plh> ... if Mark proposal is before the first event, that would mesh with any proposal we would make about progress event
15:23:18 <plh> John: the important part is that we make it async
15:23:26 <plh> ... we can figure out the relationship later
15:23:58 <plh> https://www.w3.org/Bugs/Public/show_bug.cgi?id=21155
15:24:10 <plh> EME should be explicit about its relationship with Web Platform APIs that allow video frames and audio samples to be extracted from an HTMLMediaElement
15:25:05 <plh> Henri: it seems there are at least two classes of CDMs. one that gives the pixel data back to the browser, and one that gives it to the GPU
15:25:26 <plh> ... for the later, painting on canvas wouldn't work
15:25:53 <plh> ... for the former, it seems we wouldn't want it to work either
15:26:05 <plh> ... we need to be more explicit about the expected behavior
15:26:11 <plh> ... ie we should cover both cases
15:26:26 <plh> ... if you're writing JS, you should be able to know the expected by looking at the spec
15:26:33 <joesteele> +q
15:26:37 <plh> ack joe
15:27:08 <plh> Joe: agreed. I propose that we never pass back the data to the JS layer
15:27:15 <glenn> +q
15:27:23 <ddorwin> q+
15:27:24 <plh> ... that would introduce too much complexity to the CDM layer
15:27:27 <pal> q+
15:27:31 <plh> ... so let's not have that use case
15:27:51 <plh> Glenn: what API currently exist to allow video frame access?
15:28:10 <plh> Henri: pixels can be extracted using canvas. not quite sure about the Web Audio API
15:28:11 <adrianba> q+
15:28:27 <plh> q+
15:28:47 <plh> ... there are restrictions on canvas due to same origin policy
15:29:10 <pal> see http://www.w3schools.com/tags/canvas_drawimage.asp
15:29:24 <plh> ... it seems simpler to say that painting to a canvas with a non-null media key fails in some fashion
15:29:27 <acolwell> https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#MediaElementAudioSourceNode allows audio samples to be exported to JS
15:29:27 <markw> +1
15:29:44 <plh> Glenn: you're referring to createPattern?
15:29:45 <adrianba> drawImage -> http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas/#dom-context-2d-drawimage
15:29:59 <pal> drawImage(document.getElementById("video1"),5,5,260,120,005)
15:30:06 <adrianba> q?
15:30:12 <adrianba> ack glenn
15:30:13 <plh> ack gl
15:30:17 <plh> ack dd