- From: Charles McCathieNevile <chaals@opera.com>
- Date: Fri, 31 Oct 2008 16:05:35 +0100
- To: "Web Applications Working Group WG" <public-webapps@w3.org>
- Cc: "public-svg-wg@w3.org" <public-svg-wg@w3.org>
Cc'ed to SVG as well, since people there use progress events. Please reply to the Web Apps group (reply-to is set). On Sat, 25 Oct 2008 22:45:10 +0200, Web Applications Working Group Issue Tracker <sysbot+tracker@w3.org> wrote: > ISSUE-78: HTML5 stalled and suspend progress events [Progress Events] > > http://www.w3.org/2008/webapps/track/issues/78 > > Raised by: Philip Jägenstedt > On product: Progress Events > > http://www.w3.org/html/wg/html5/#mediaevents > > The events in HTML 5 fired for the media elements (<video>+<audio>) are > called ProgressEvents and are intended to eventually refer to the > Progress Events spec. > > Currently the HTML5 draft specifies two events not covered by the > Progress Events draft: stalled and suspend We have previously discussed a stalled event, in the context of suggested timing for producing progress events. We decided not to set a specific timing, because the use cases vary a lot and so the appropriate timing of progress events does too. So we could add the event directly to this spec, as a convenience. I think the suspend event would be useful and am inclined to add it. Should there be an unsuspend event, or is it enough to just emit a new progress event signifying taht something started again? And do others think this is a useful addition or just extra work? > These should be added to the draft, I suggest the following phrasing: If we add these, I like the suggested phrasing. > Name / Description / How often? / When? > > stalled / The operation is unexpectedly not progressing / zero or more / > May be dispatched zero or more times after a loadstart event, before any > error, abort or load event is dispatched > > suspend / The operation is temporarily suspended / zero or more / May be > dispatched zero or more times after a loadstart event, before any error, > abort or load event is dispatched > > Rationale: > > Stalled is used to signal that the download is for some reason not > progressing, but the user agent has not yet given up and fired an error > event. In HTML5 this happens when no data has been received for > approximately 3 seconds. > > Suspend is used to signal that the user agent is deliberately pausing > the download. In the case of audio/video, the user agent may initially > download only a portion of the file and fetch the rest only when/if the > user plays the audio/video to a point where it is needed. cheers Chaals -- Charles McCathieNevile Opera Software, Standards Group je parle français -- hablo español -- jeg lærer norsk http://my.opera.com/chaals Try Opera: http://www.opera.com
Received on Friday, 31 October 2008 15:06:13 UTC