Hi guys I filled out the table for 3GPP, and for 99% of the time this also supplies information for MP4 and Movie files as well. For all these, the only XPath I know that is defined is selecting a track; in 3GP, MP4 and Movie files, tracks may be identified by track ID, using the ISO/IEC 21000-17:2006 "ffp()" syntax (#ffp(track_ID=101), for example). The one item that differs between the formats is 'description'. In 3GPP, this is the dscp user-data item. In 'classic' movies, it's probably İinf (information about the movie); but the language codes and text encodings used in classic user-data would need some ... exploring. MP4 files have no native format for expressing this, unless you consider MPEG-7 such. I made the table in Excel; if this is the right information, and the right level of info, Courtney and I could work on getting it into HTML. (I added a column of 'what this item is' for my own reminder, it's not in the normal tables). I'm not sure I understand all the columns, mind you. What goes in 'relation'?
David Singer Multimedia and Software Standards, Apple Inc.
Received on Tuesday, 28 September 2010 17:19:39 UTC