On 23 Mar 2007, at 03:15, liorean wrote:
On 23/03/07, Sander Tekelenburg <[EMAIL PROTECTED]> wrote:
While that might be useful, it's not at all obvious to me that it
is a
*requirement*. What is so wrong with fetching the entire file, and
start
playing it at the point referenced by the fragment identifier?
That's how
fragment identifiers work for textual resources (and they fetch
the usual
truckload of images along with the HTML file).
Well, it would be nice to not have to download an hour long lecture to
see the 30 second interval of interest starting at at 47:26...
However, as I understand the Ogg Theora format, it contains essential
data for decoding in the start of the file, so unless the server has
some format specific knowledge and handling the client must either
have already gotten that information somehow, or must request the
entire file. I have no idea whether the other codecs I've heard
discussed (Dirac and H.264) have a similar issue or not.
That sort of info is held within the container, so everything within
Ogg (so both Theora and Dirac) will suffer from it. H.264 being part
of the MPEG-4 standard follows what Kevin Marks said:
On 24 Mar 2007, at 08:57, Kevin Marks wrote:
2. define a chunk/offset table that maps media to time, and look this
up ahead of any seeking. (this is the QT approach, and that of MPEG4
- Geoffrey Sneddon
