[M4IF Technotes] IBM Toolkit for MPEG-4 is now available as a technology download from IBM alphaWorks

[Michelle Y Kim]

Dear Olivier,
>Are there some restrictions on the Systems profiles we can use with 
XMTBatch, or can we edit freely any XMT files ?
XMTBatch supports both XMT-O and XMT-A textual format. XMT-A is the format 
that is a one-to-one mapping to the MPEG-4 binary format, XMT-O is a 
higher level format more comparable to SMIL, that is, in our opinion, much 
easier to create content with. Think in some ways of writing in assembly 
language versus C++.
In XMT-A (assembler) we support encoding of all nodes with the exception 
of Script and Proto, and we have no support for quantization (nor 
predictive array coding). So this covers most profiles but for the 
exceptions indicated. 
In XMT-O we have concentrated on support  for 2D media in this higher 
level format and XMTBatch compiles/creates content whose target is around 
the Main2D SceneGraph profile along with up to Advanced 2D Graphics 
profile. (Although we support 3D in XMT-A we do not as yet in XMT-O).
> is it allowed to use DivX ASP tools to encode the video track with AVgen 
( B-Frames, 1/4 pel, GMC ) ?
For the inclusion of media we support mp3, aac and MPEG-4 video. Note that 
we do not have encoders but can 'format' pre-encoded streams into the mp4 
file format. Our player and preview windows in AVgen and XMTBatch support 
playback of mp3, low complexity AAC and Simple Profile MPEG-4 video. 
However we are not limited to these profiles when it comes to 'formatting' 
encoded streams into an mp4 file and so AVGen can handle putting Advanced 
Simple Profile streams into mp4 format (though you cannot preview or play 
the stream back as our decoder only handles Simple Profile Video tools, 
i.e.,  the decoder in the toolkit does not handle B-Frames, 1/4pel or 
GMC).
> Which audio and video profiles are allowed to produce 3GPP compliant 
content with AVgen ?
We support Low Complexity AAC and MPEG-4 Simple Profile video,  and we can 
hint according to RFC 3016 as required by 3GPP.
>Which Systems profiles are implemented into M4Play ?

The IBM Toolkit for MPEG-4  released on alphaWorks does not contain all 
the technologies we have developed for it. The released player is 
targetted to SceneGraph profile Main2D and up to Advanced 2D Graphics 
profile.  However some features are omitted and it is thus not fully 
conformant to the letter of the profile. There are licensing and other 
issues behind this decision. 
The toolkit does however contain a very useful set for evaluation and we 
are planning to release further features in future updates.
"Olivier Amato" <oamato   wanadoo.fr>
Sent by: technotes-admin   lists.m4if.org
05/08/2023 04:27 AM
        To:     <technotes   lists.m4if.org>, Michelle Y 
Kim/Watson/IBM   IBMUS
        cc: 
        Subject:        Re: [M4IF Technotes] Fw: IBM Toolkit for MPEG-4 is 
now available as a technology  download  from IBM alphaWorks
Dear Michelle,
> We have posted  the IBM Toolkit for MPEG-4 on IBM alphaWorks as a
> technology download from  http://www.alphaworks.ibm.com/tech/tk4mpeg4.

Thanks a lot to IBM for this very interesting release.
> XMTBatch is a tool for creating rich MPEG-4 content beyond simple audio
> and video. Both AVgen and XMTBatch are based on the XMT standard (MPEG-4
> in XML) technology.

Are there some restrictions on the Systems profiles we can use with
XMTBatch, or can we edit freely any XMT files ?
You say we can use DivX to encode the video track, but it seems that AVgen
only supports Simple Profile ( DivX is an Advanced Simple Profile
implementation ).
So, is it allowed to use DivX ASP tools to encode the video track with 
AVgen
( B-Frames, 1/4 pel, GMC ) ?
Which audio and video profiles are allowed to produce 3GPP compliant 
content
with AVgen ?
> M4Play is an MPEG-4 playback application.

Which Systems profiles are implemented into M4Play ?
Best regards,
Olivier
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