- From: Cyril Concolato <cyril.concolato@telecom-paristech.fr>
- Date: Thu, 30 Oct 2014 18:18:53 +0100
- To: "public-inbandtracks@w3.org" <public-inbandtracks@w3.org>
Dear all, During the discussion on a bug [1] and associated pull request [2], the question of the status of our spec was raised. Bob mentioned a previous discussion with the HTML WG chairs [3]. The assumption in that thread was that our group wants "to publish [a spec] along the same lines as the "Media Source Extensions Byte Stream Format Registry" was published and referenced from the MSE specification.". If we want Web applications to be able to use in-band tracks in browsers interoperably, according to our spec, we need to be able to check conformance to our spec. For that, we need to have normative statements in our spec. Currently, the spec is in my opinion too soft about that. In my view, if an implementation decides to support both our spec and a particular media resource format (say MP4), then it shall expose tracks according to our spec. This does not seem to me contradictory to the discussion with the HTML WG chairs because if you look at the ISOBMFF byte stream format for MSE [4], it does indeed use normative statements such as: "The user agent must support setting the offset from media ..." "These boxes must be accepted and ignored by the user agent ..." So, my recommendation would be to rephrase our spec to be clearer as to what UA shall/should/should not/may ... do using normative statements. What's the opinion of the group here ? Cyril [1] https://www.w3.org/Bugs/Public/show_bug.cgi?id=26923 [2] https://github.com/w3c/HTMLSourcingInbandTracks/pull/32 [3] http://lists.w3.org/Archives/Public/public-html-admin/2014Jun/0050.html [4] https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/isobmff-byte-stream-format.html -- Cyril Concolato Multimedia Group / Telecom ParisTech http://concolato.wp.mines-telecom.fr/ @cconcolato
Received on Thursday, 30 October 2014 17:20:05 UTC