- From: Cyril Concolato <cyril.concolato@telecom-paristech.fr>
- Date: Mon, 20 Oct 2014 09:48:23 +0200
- To: public-html-media@w3.org
Le 20/10/2014 03:27, Silvia Pfeiffer a écrit : > I'm just taking a look at the MSE spec (writing a book chapter about > it, actually). > > I'm looking at MediaSource.addSourceBuffer() which to me seems to be > the key method to add chunks of a media resource to a MediaSource > object. > > I'm reading the following in the spec: > > `` > addSourceBuffer > > Adds a new SourceBuffer to sourceBuffers. > > Implementations must support at least 1 MediaSource object with the > following SourceBuffer configurations. MediaSource objects must > support each of the configurations below, but they are only required > to support one configuration at a time. Supporting multiple > configurations at once or additional configurations is a quality of > implementation issue. > > * A single SourceBuffer with 1 audio track and/or 1 video track. > > * Two SourceBuffers with one handling a single audio track and the > other handling a single video track. > `` > > It seems that a SourceBuffer can only have either an interleaved > audio/video track, or just audio or just video. I'm a bit confused > about that, because SourceBuffer clearly talks about multiple audio > and video tracks, and also about text tracks. In theory, a SourceBuffer may indeed correspond to many multiplexed streams (audio(s)+video(s)+text track(s)+metadata track(s)). The text you quoted indicates minimal implementation requirements. Implementations are free to support more than that. HTH, Cyril > > Is this text left-over from the early days of the specification? Does > it actually mean that you can either provide tracks in an interleaved > manner or as separate SourceBuffers? OR do you really mean what is > written there? If the latter, how then do you get multiple tracks and > in particular text tracks into MediaSource ? > > Thanks for any clarification you can provide! > > Cheers, > Silvia. > -- Cyril Concolato Multimedia Group / Telecom ParisTech http://concolato.wp.mines-telecom.fr/ @cconcolato
Received on Monday, 20 October 2014 07:48:45 UTC