Re: In-band track metadata attribute

On Mon, 2014-03-10 at 16:11 +0000, Bob Lund wrote:
Someone (Silvia?) proposed this interface in the Wiki [1]:

I proposed this.

I guess this would replace inBandMetadatatrackDispatchType. I think this is a good idea. Adding ‘mediaType' makes it easy for script to know how to parse the metadata. Adding ‘metadata’ as ArrayBuffer makes things easier for the UA and could also be added, if use cases support, to audio and video tracks.

I guess the big question is whether it would work for the other formats. For MPEG-TS, it would simplify things because we can provide binary data as binary.


  *   For Ogg, it seems like the inBandMetadatatrackDispatchType. is superfluous, since we already provide the Name header as the track "id".
  *   For WebM, we could provide the CodecID as the mediaType, or part of the mediaType, and leave metadata null.
  *   For MPEG-4, we could do the same thing.

I guess the question I have now is, would this change be useful for any format except MPEG-TS? When I proposed this, I assumed that each format would have metadata to put in the "metadata" attribute, but it looks like only MPEG-TS does, so maybe inBandMetadatatrackDispatchType really is the simplest solution.