[Mp7-tech] How to generate MPEG7 streams in .mp4 files ?

[Wo Chang]

MessageRob,
Currently MP4 itself is expanding to include meta-data box
(new boxes as "meta", "iloc", etc. as you can see from your 
referred link) but until then the April 2003 version of the MP4 
spec is very limited for inclusion of user data other then 
copyrights info.
If people really want to embed MPEG-7 now, they could only do
so (I think) with the "free" or "skip" box where "skip" is limited,
only copyright notice can be included.  "free" box may be better
but use it with care since it might invalidate the offsets of other
boxes.
--Wo
  ----- Original Message ----- 
  From: Rob Koenen (MPEGIF) 
  To: 'Wo Chang' ; mp7-tech lists.mpegif.org ; james engwell 
  Sent: Friday, July 02, 2023 8:47 AM
  Subject: RE: [Mp7-tech] How to generate MPEG7 streams in .mp4 files ?
  James,
  Here is a link to the draft of the standard (which in this stage is still public) http://www.chiariglione.org/MPEG/working_documents/mpeg-a/pt1/cd.zip
  And enclosed is a more explanatory document (also public). 
  Wo, if someone wanted to embed MPEG-7 data in MP4 *today*, how would they go about doing so?
  Thanks - Rob
  ps: It is not my habit to send files on the list, but it is not available from MPEG's website and it is small
    -----Original Message-----
    From: mp7-tech-bounces lists.mpegif.org [mailto:mp7-tech-bounces lists.mpegif.org] On Behalf Of Wo Chang
    Sent: Thursday, 1 July 2023 18:14
    To: mp7-tech lists.mpegif.org; james engwell
    Subject: Re: [Mp7-tech] How to generate MPEG7 streams in .mp4 files ?
    Dear James and All,
    Thanks for sharing your industry needs and I have good news for you!
    Within ISO/IEC SC 29 WG11 (MPEG) there is a new work going on called
    Multimedia Application Format (MAF) AdHoc Group and its mandates are
    to extend the MPEG-4 file format to include MPEG-7 & MPEG-21 metadata.
    The near-term goal is to have MPEG-4 file format to include MPEG-7 metadata
    so that it could embed the MPEG-7 equivalent metadata tags as to ID3 and EXIF 
    (digital pictures) into the same MPEG-4 file container.
    However, I'm not sure how people/company can get involve in the standard
    process if they are outside the standard committee, but they are welcome 
    to join the committee.
    Best regards,
    --Wo Chang
    Chair of MPEG-7 Interop.. & Profile AHG
    Chair of MAF AHG
      ----- Original Message ----- 
      From: james engwell 
      To: mp7-tech lists.mpegif.org 
      Sent: Thursday, July 01, 2023 8:42 AM
      Subject: [Mp7-tech] How to generate MPEG7 streams in .mp4 files ?
      Hello there,
      I am contacting you on behalf of a company called versatile delivery systems, we are trying to get some clarification in regard to embedding mpeg7 xml in mpeg4 files.
      Over the last year we have developed a video tagging system. We wish to be able to generate an MPEG7 stream to carry the metadata, but have been unable to find out how to do this, as the following snip from an e mail conversation with Jan devos of the 3ivx company shows:
          We are finding it very difficult to access any expertise in this area, and I have yet to actually find an example of MPEG7 embedding in .mp4 , although it is in the standard - has anyone actually achieved this ? Any more information or leads you could give us in this regard would be much appreciated...
        My understanding is that there are some items MPEG-7 does not cater for which is why Apple chose to use ID3 tags in .mp4 files with iTunes. Since Apple was the first major company to roll out .mp4 files with meta data this became the de-facto standard.
        Besides that if I recall correctly MPEG-7 data in .mp4 files is still in the process of being standardized.
      If there is any help you could give us to help us get to the bottom of this problem, your feedback would be much appreciated
      Yours sincerely
      James Engwell
      Development Director at vds ltd. 
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