[MPlayer-dev-eng] container format

[Michael Niedermayer]

Hi

On Thursday 06 February 2003 18:37, Mark Zealey wrote:
[...]
> > > 4) Possible use of compression on text, for example the headers (point
> > > 3) and the subtitles.. The compression would be done on the whole text
> > > basis and then maybe split up into the parts. Of course, the
> > > compression would only be done where it was favourable...
> >
> > the headers are compressed, they surely could be compressed more but
> > IMHO, its not worth it, the 10k or so of repeated headers in a 600mb file
> > dont really matter, and the subtitles are considered as a normal stream
> > like video so they can be just encoded differently (invent a bzip2 based
> > subtitle format but thats idependant of the container ...)
> > the info stuff like description needs some more thoughts, but i doubt
> > that its large enough for the extra comlexity to be worth it even if its
> > repeated a lot
>
> I meant the text headers in point 3 (Author:, Title: etc, this text block
> could be unlimited size and in some situations it might save a bit of
> space... I could see a lot of uses for this just text area, for example one
> could define a Chapter: heading which would let the encoder encode the
> title, start, and end of each chapter on the dvd into the heading so a
> player supporting the Chapter: header could let the viewer skip straight
> through to a chapter.. just a thought
>
> Headers we could have (as in ogg, multiple headers of the same name are
> allowed, eg Author, to signify multiple authors)
>
> Copyright - A copyright notice
> Title - The title
> Chapter - chapter info (start pos (frame?), end pos/length, title, whatever
> else) Artist - for music
> Track - for music again
> TrackNumber - again
> Genre - for both music and film
> ...
>
> you get the idea, i like the flexability and the ability to extend at no
> cost.. also the ease of compression.
perhaps we should add a start/end timestamp to each info packet, so that all 
strings like author/title/... could be specific to some part (chapter, scene, 
whole file)

Michael