- From: David Singer <singer@apple.com>
- Date: Thu, 24 Feb 2011 17:36:43 -0800
- To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Cc: Bob Lund <B.Lund@cablelabs.com>, "public-html@w3.org" <public-html@w3.org>
On Feb 24, 2011, at 17:29 , Silvia Pfeiffer wrote: > > > When you talk about videos that are slide shows, are you actually > talking about videos or about a sequence of images (photos) that are > also sparse along the timeline, so not really "moving images"? If they > are encoded as video, it would be impossible to distinguish the data > as a sequence of photos. The other case - basically an "image track" > is not something we've ever discussed before and is not something that > all containers have formats for FAIK. I mean a video track where the frame rate is like 1 frame every 10 seconds. Many, or even most, containers can express this, I think. > As for chapter images - I am not sure how they are encoded in > QuickTime/MPEG, so if you know, please share. I would have thought > that a text track with image urls could be sufficient for this. An obvious choice is as above, using an I-frame-only coding (e.g. JPEG). David Singer Multimedia and Software Standards, Apple Inc.
Received on Friday, 25 February 2011 01:37:45 UTC