[Mp4-tech] adif/adts to raw

Tue Feb 8 13:18:12 ESTEDT 2005

Can any one provide the MPEG4 AAC ADTS/ ADIF audio   format to RAW audio
format converter tool?
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Sent: Monday, February 07, 2024 10:36 PM
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Subject: Mp4-tech Digest, Vol 19, Issue 11
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Today's Topics:
   1. Compression ratio (Gopalakrishnan Srinivasan)
   2. Re: Can a single Macro Block data extend over multiple	video
      packets? (Herbert Thoma)
   3. XMT-A and XMT-O Documentation (Ole Jaekel)
   4. Re: Can a single Macro Block data extend over multiple	video
      packets? (Herbert Thoma)
   5. Re: XMT-A and XMT-O Documentation (Oliver Baum)
----------------------------------------------------------------------
Message: 1
Date: Sun, 6 Feb 2024 21:02:26 -0800 (PST)
From: Gopalakrishnan Srinivasan <gops98 yahoo.com>
Subject: [Mp4-tech] Compression ratio
To: mp4-tech lists.mpegif.org
Message-ID: <20050207050226.20671.qmail web54206.mail.yahoo.com>
Content-Type: text/plain; charset="us-ascii"
Hi Experts,
               When we do system analysis for MPEG-4 simple profile at
simple level what is the compression ratio as rule of thump we need to
consider for each I & P frames. I need this info to do system analysis for
fast forward & fast backward so that how much % of overhead we need for
inserting more I frames.
Thanks & Regards,
SGK
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Message: 2
Date: Mon, 07 Feb 2024 11:47:38 +0100
From: Herbert Thoma <tma iis.fhg.de>
Subject: Re: [Mp4-tech] Can a single Macro Block data extend over
	multiple	video	packets?
To: Arun Menon <arunm motechsoftware.com>
Cc: mp4-tech lists.mpegif.org
Message-ID: <4207474A.9010208 iis.fhg.de>
Content-Type: text/plain; charset=us-ascii; format=flowed
Arun Menon schrieb:
> Hi All,
>
> I would really appreciate if somebody would answer my questions.
>
> 1) In MPEG4 is it possible for a single macro block data to extend over
> multiple video packets?

No.
> 2) Is there a maximum or minimum size for video packets in MPEG4?

Maximum size of video packets is restricted by levels, e.g. Simple Profile
Level 2 has a maximum video packet size of 4096 bits.
Kind regards,
  Herbert.
> Thanks & Regards,
> Arun Menon
>
>
>
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> _______________________________________________
> NOTE: Please use clear subject lines for your posts. Include [audio,
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--
Herbert Thoma
Group Manager Video
Multimedia Realtime Systems Department
Fraunhofer IIS
Am Wolfsmantel 33, 91058 Erlangen, Germany
Phone: +49-9131-776-323
Fax:   +49-9131-776-399
email: tma iis.fhg.de
www: http://www.iis.fhg.de/
------------------------------
Message: 3
Date: Mon, 07 Feb 2024 11:45:38 +0100
From: Ole Jaekel <ole.jaekel inf.tu-dresden.de>
Subject: [Mp4-tech] XMT-A and XMT-O Documentation
To: MP4-Tech <mp4-tech lists.mpegif.org>
Message-ID: <opsltpiccsz008qs localhost>
Content-Type: text/plain; format=flowed; charset=iso-8859-15
Hello everybody!
i am working on an transformation of 3d-scene descriptions into mpeg-4
using xmt-a and xmt-o.
i need an exact documentation what node of these two languages is meant to
do what.
So far i read "The MPEG-4 Book" by Pereira and Ebrahimi or asked X3D's or
SMIL's documentation for help. But all sources are still not exact enough.
There are still some XMT-specific nodes and concept, which exact purpose i
don't know.
Take for instance XMT-O's macros or transitions. I don't really know, what
they do!
Can someone help me, please?
Ciao Ole
--
Thought of by Ole,
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------------------------------
Message: 4
Date: Mon, 07 Feb 2024 12:55:53 +0100
From: Herbert Thoma <tma iis.fhg.de>
Subject: Re: [Mp4-tech] Can a single Macro Block data extend over
	multiple	video packets?
To: Arun Menon <arunm motechsoftware.com>
Cc: garysull windows.microsoft.com, 'mp4list'
	<mp4-tech lists.mpegif.org>
Message-ID: <42075749.4040603 iis.fhg.de>
Content-Type: text/plain; charset=us-ascii; format=flowed
Arun Menon schrieb:
> Hi,
> I am a little confused with your reply. Gary had said that there is no
> maximum or minimum size for video packets in MPEG4 ( I am asking with
> respect to Simple Profile). And Herbert, you are saying that the Level 2
of
> simple profile has a maximum video packet size of 4096 bits.
> I checked with the momosys code and in that there is no maximum or minimum
> size for video packet size.
>  	I request you to please clarify my doubt. Thanks in advance.

The reference software does not care very much about profiles and levels ...
Gary is right, as there are no technical restrictions to video packet size,
i.e. there is no syntax element that restricts the length of a video
packet.
I am right, because e.g. table N-1 of ISO/IEC 14496-2 lists maximum
video packet lenght for the levels of main, core, simple scalable and
simple profiles.
This is like the size of the video. The technical restriction of MPEG-4
part 2 here is 8191x8191 pixels but e.g. Simple Profile level 1 restricts
this to a maximum of 99 macroblocks.
Hope this helps,
  Herbert.
> Regards,
> Arun
>
>
> -----Original Message-----
> From: Herbert Thoma [mailto:tma iis.fhg.de]
> Sent: Monday, February 07, 2024 4:18 PM
> To: Arun Menon
> Cc: mp4-tech lists.mpegif.org
> Subject: Re: [Mp4-tech] Can a single Macro Block data extend over
> multiple video packets?
>
>
> Arun Menon schrieb:
>
>>Hi All,
>>
>>I would really appreciate if somebody would answer my questions.
>>
>>1) In MPEG4 is it possible for a single macro block data to extend over
>>multiple video packets?
>
>
> No.
>
>
>>2) Is there a maximum or minimum size for video packets in MPEG4?
>
>
> Maximum size of video packets is restricted by levels, e.g. Simple Profile
> Level 2 has a maximum video packet size of 4096 bits.
>
> Kind regards,
>   Herbert.
>
>
>>Thanks & Regards,
>>Arun Menon
>>
>>
>>
>>--------------------------------------------------------------------------
>
> -----------------------------------------------------
>
>>DISCLAIMER:
>>This message (Including any attachments) is confidential and is intended
>
> only for the addressee. All MoTech Software mails and attachments are
> scanned for all known viruses at the time of transmission. However, please
> scan the mail and attachments for viruses before opening or downloading
from
> this transmission. We will not accept any liability for damages through
> virus. If you are not the intended recipient or received this message by
> mistake, please notify the sender by E-mail & delete the message from the
> system. Any unauthorized use or dissemination of the message in whole or
> part is strictly prohibited.
>
>>
>>------------------------------------------------------------------------
>>
>>_______________________________________________
>>NOTE: Please use clear subject lines for your posts. Include [audio,
>
> [video], [systems], [general] or another apppropriate identifier to
indicate
> the type of question you have.
>
>>Note: Conduct on the mailing list is subject to the Antitrust guidelines
>
> found at
> http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php
>
> --
> Herbert Thoma
> Group Manager Video
> Multimedia Realtime Systems Department
> Fraunhofer IIS
> Am Wolfsmantel 33, 91058 Erlangen, Germany
> Phone: +49-9131-776-323
> Fax:   +49-9131-776-399
> email: tma iis.fhg.de
> www: http://www.iis.fhg.de/
>
>
>
>
> --------------------------------------------------------------------------
-----------------------------------------------------
> DISCLAIMER:
> This message (Including any attachments) is confidential and is intended
only for the addressee. All MoTech Software mails and attachments are
scanned for all known viruses at the time of transmission. However, please
scan the mail and attachments for viruses before opening or downloading from
this transmission. We will not accept any liability for damages through
virus. If you are not the intended recipient or received this message by
mistake, please notify the sender by E-mail & delete the message from the
system. Any unauthorized use or dissemination of the message in whole or
part is strictly prohibited.
>

--
Herbert Thoma
Group Manager Video
Multimedia Realtime Systems Department
Fraunhofer IIS
Am Wolfsmantel 33, 91058 Erlangen, Germany
Phone: +49-9131-776-323
Fax:   +49-9131-776-399
email: tma iis.fhg.de
www: http://www.iis.fhg.de/
------------------------------
Message: 5
Date: Mon, 07 Feb 2024 15:24:21 +0100
From: Oliver Baum <bam iis.fraunhofer.de>
Subject: Re: [Mp4-tech] XMT-A and XMT-O Documentation
To: Ole Jaekel <ole.jaekel inf.tu-dresden.de>
Cc: mp4-tech lists.mpegif.org
Message-ID: <42077A15.2020507 iis.fraunhofer.de>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Hi!
Ole Jaekel wrote:
> i am working on an transformation of 3d-scene descriptions into mpeg-4
> using xmt-a and xmt-o.
> i need an exact documentation what node of these two languages is meant
> to do what.

I found details regarding the XMT-A and XMT-O format in the ISO/IEC
14496-11 spec. (subpart 3).
Unfortunately I neither know details about the public availability of
this MPEG document nor can mention You an internal MPEG document number
(there is none on the spec.).
Regards,
	Oliver
--
Oliver Baum
Multimedia Transport Group
Dept. Audio
Fraunhofer Institute for Integrated Circuits IIS
Am Wolfsmantel 33
91058 Erlangen
Germany
E-mail: bam iis.fraunhofer.de
Phone:  +49(0) 9131 / 776 - 319
Fax:    +49(0) 9131 / 776 - 398
http://www.iis.fraunhofer.de/amm/
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------------------------------
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End of Mp4-tech Digest, Vol 19, Issue 11
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