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Re: [sdw] WebVMT: Review media block concept against WebVTT (#1099)

From: Rob Smith via GitHub <sysbot+gh@w3.org>
Date: Thu, 06 Dec 2018 16:31:24 +0000
To: public-sdwig@w3.org
Message-ID: <issue_comment.created-444935636-1544113882-sysbot+gh@w3.org>
**SDW IG Review Summary (5/12/18)**

The purpose of the [WebVMT media block](
http://w3c.github.io/sdw/proposals/geotagging/webvmt/#dfn-webvmt-media) is to identify the linked media file for out-of-band, i.e. non-embedded, data. This information is _known_ at creation by the capture device, _duplicated_ in HTML by the `<track>` element to display in a web page and _required_ to index a video archive.

Acknowledged weaknesses are:
   1. The information needs to be correctly maintained, e.g. when a media file is renamed.
   1. There could be a conflict in HTML between the details in the [WebVMT media url setting](http://w3c.github.io/sdw/proposals/geotagging/webvmt/#dfn-webvmt-media-url-setting) and in the `src` attribute of the `<source>` element.

   * Add an explanatory note to clarify the purpose of this information.
   * Add a note highlighting the need to maintain the link correctly.
   * Add a note explaining how a user agent should resolve conflicting information.
   * Raise a new issue to investigate a better solution for handling out-of-band links.

GitHub Notification of comment by rjksmith
Please view or discuss this issue at https://github.com/w3c/sdw/issues/1099#issuecomment-444935636 using your GitHub account
Received on Thursday, 6 December 2018 16:31:26 UTC

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