- From: Eric Carlson <eric.carlson@apple.com>
- Date: Tue, 12 Apr 2011 11:51:57 -0700
- To: Laura Carlson <laura.lee.carlson@gmail.com>
- Cc: Henri Sivonen <hsivonen@iki.fi>, Silvia Pfeiffer <silviapfeiffer1@gmail.com>, Danny Ayers <danny.ayers@gmail.com>, "public-html@w3.org" <public-html@w3.org>
On Apr 12, 2011, at 10:42 AM, Laura Carlson wrote: > Hi Eric, > > On 4/12/11, Eric Carlson <eric.carlson@apple.com> wrote: >> Laura - >> >> On Apr 12, 2011, at 10:14 AM, Laura Carlson wrote: >> >>> >>> Silvia, maybe accessing video and audio transcripts would be a another >>> use case to add. I don't know. Would that be applicable? Transcripts >>> may be embedded in a video but when people are on a dialup modem, (I >>> am a majority of the time), they have no way to obtain that transcript >>> unless the author remembers to supply a link to the transcript in the >>> body of the document. In this use case they are locked out of all >>> video content. >>> >> Textual transcripts embedded in a video file are available to script >> though the Track API [1]. > > How does the end user obtain the transcripts if there is no script? > They can't, but as far as I know there is no standard way to mark a text track in an audio or video file as a "transcript" so a script with hard-coded knowledge about the contents of such a movie will be required for this anyway. In any case all of the samples in a media file are typically intermixed, eg. a text track will be broken up into small chunks and spread throughout the file. This means that it isn't usually possible to load only a text track, and in your example of a user with a slow network connection it will be necessary to download the entire video file even if they only want the transcript. eric
Received on Tuesday, 12 April 2011 18:52:27 UTC