- From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Date: Mon, 20 Oct 2014 20:36:57 +1100
- To: Cyril Concolato <cyril.concolato@telecom-paristech.fr>
- Cc: "<public-html-media@w3.org>" <public-html-media@w3.org>
On Mon, Oct 20, 2014 at 6:48 PM, Cyril Concolato <cyril.concolato@telecom-paristech.fr> wrote: > 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. Ah thanks for clarifying. It's still quite confusing actually. In particular the point about returning two SourceBuffers where the return value of the method is merely a SourceBuffer object. Can you explain how that is going to work, too? Thanks, Silvia.
Received on Monday, 20 October 2014 09:37:44 UTC