- From: Raphaël Troncy <Raphael.Troncy@cwi.nl>
- Date: Thu, 05 Feb 2009 01:08:40 +0100
- To: Conrad Parker <conrad@metadecks.org>
- CC: Jack Jansen <Jack.Jansen@cwi.nl>, Media Fragment <public-media-fragment@w3.org>
Dear Conrad, > We've seen users often want to write eg. "2:30" to specify a time of 2 > minutes 30 seconds, rather than having to type out 0:02:30. I'd > suggest making the hours specification optional. Hum, currently the syntax allows to use either a npt value (in your case 150s for 2:30) or a smpte value (for which the hour is not optional). Which scheme would you like to add that would have the hour optional? Could you give it a name? > Using a single ':' to separate an optional frame count from the rest > of the time is visually ambiguous -- eg. does 1:12:07 refer to 1m12s7f > or 1h12m7s? We can't expect users to consult the grammar to see that > hours are mandatory and frames are optional. In smpte, it is not ambiguous :-) But you're right, you need to know the grammar ... > I suggest using two colons '::' as the frame separator, which I recall > having seen commonly used in video applications. We could do that, but with a 3rd scheme that would not be npt or smpte. What would you suggest? Could you please suggest (simpler) valid media fragment URI? Cheers. Raphaël -- Raphaël Troncy CWI (Centre for Mathematics and Computer Science), Science Park 123, 1098 XG Amsterdam, The Netherlands e-mail: raphael.troncy@cwi.nl & raphael.troncy@gmail.com Tel: +31 (0)20 - 592 4093 Fax: +31 (0)20 - 592 4312 Web: http://www.cwi.nl/~troncy/
Received on Thursday, 5 February 2009 00:09:34 UTC