[Mp4-tech] MPEG-4 Natural video reference code from Microsoft

[Shailendra Singh]

Hi Jens,
    Thanks for the information.
    A related question : Who should I contact for clarifications related 
to Microsoft's implementation of natural video encoder/decoder ? For 
instance, I was trying to encode a YCbCr sequence using the MS natural 
video encoder to generate a SP bitstream, but the bitstream produced was 
not SP ( had B-VOPs). I could figure out that I need to set the 
Header.ProfileAndLevel parameter in the parameter file for the encoder 
to the appropriate profile_and_level_indication value but beyond  that I 
was not sure about other parameters.
Regards,
Shailendra
Jens-Rainer Ohm wrote:
>Dear Shailendra,
>
>The newest version of the Microsoft reference code (with all known bugs
>fixed) was recently approved in the context of 14496-5/AMD5, which is
>presently in the process of publication by ISO. This will then probably
>be published on the ISO Web Site in the near future. This code is
>already available from the MPEG Video Group software maintenance site
>http://megaera.ee.nctu.edu.tw/mpeg/Ref_Software/cd_software_with_FGS/,
>and has now also been copied to the NIST CVS in sub-directory
>microsoft-2.5-040207-NTU/.
>
>Best regards,
>Jens
>
>  
>
>>-----Original Message-----
>>From: mp4-tech-bounces lists.mpegif.org 
>>[mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of 
>>Shailendra Singh
>>Sent: Monday, April 12, 2024 2:51 PM
>>To: Mp4-tech lists.mpegif.org
>>Subject: [Mp4-tech] MPEG-4 Natural video reference code from Microsoft
>>
>>
>>Hi All,
>>    Currently I have 2 sets of MPEG-4 reference software :
>>    - From ISO's site, 
>>(http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/1449
>>6-5_Compressed_directories/Visual/Natural.zip) 
>>which contains the microsoft-vfdis-v10-990812 folder
>>    - On a CD which contains 14496-5 (Reference Software), purchased 
>>from ISO/IEC. The folder containing the natural video reference code 
>>from Microsoft is microsoft-2.3-001213.
>>
>>    The code on the CD appears to be more recent (going by 
>>the "990812" 
>>and "001213" fields in the names of the folders) and also I have seen 
>>the code from ISO's site fail for a particular bitstream which was 
>>successfully decoded by the code which came on the 14496-5 
>>CD. Could someone please clarify :
>>(1) Is "microsoft-2.3-001213" the latest reference code from 
>>Microsoft ? 
>>If not, how do get access to the latest reference code from 
>>Microsoft ?
>>(2) Another source of reference code seems to be the NIST MPEG CVS 
>>Repository (accessible from http://mpeg.nist.gov/). One of 
>>the earlier 
>>mails on this mailing indicates that at least for audio, the 
>>repository 
>>is NOT used actively by the reference software developers and 
>>does not 
>>contain the latest audio reference code. Is that the case for video 
>>(natural, specifically) as well ?
>>
>>Thanks and Regards,
>>Shailendra
>>
>>
>>
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>>    
>>
>trust.php
>
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>  
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