MPEG asks for MIME review for the MPEG21 file format

[Stephan Wenger]

That's Dave Singer as the contact, of course.  Sorry for the typo.
Stephan

On May 14, 2007, at 6:33 AM, Stephan Wenger wrote:

> Folks,
> MPEG (ISO/IEC JTC1 SC29) sent us an liaison statement asking us to  
> review their draft for a MIME registration of the MPEG-21 file  
> format.  I know nothing about the subject matter, but hope some of  
> you could give them a hand.  Please direct any technical questions  
> to Save Singer of Apple, singer at apple.com.  Below, please find what  
> I believe they want to register.  Their full liaison statement (in  
> a bunch of word files) can be found here: https:// 
> datatracker.ietf.org/public/liaisons.cgi, look for ISO/IEC JTC1  
> SC29, May 2007
> Best regards,
> Stephan
>
>> MIME media type name: application
>> MIME subtype name: mp21
>> Required parameters: none
>> Optional parameters: none
>> Encoding considerations: base64 IS generally preferred; files are  
>> binary and should be transmitted without CR/LF conversion, 7-bit  
>> stripping, etc.
>> Security considerations: It is possible to inject non-compliant  
>> MPEG streams (Audio, Video, and Systems) in the MP21 file to  
>> overload the receiver/decoder's buffers. This might compromise the  
>> functionality of the receiver or even crash it.
>> An MP21 file supports the storage of stream types, including  
>> commands that are executed on the terminal such as Digital Item  
>> Methods based on ECMASCRIPT for which also bindings to Java(TM)  
>> and C++ exists. It is possible to use one or more of the above in  
>> a manner non-compliant to MPEG to crash the receiver or  
>> temporarily make it unavailable.
>> Authentication mechanisms can be used to validate of the sender  
>> and the data to prevent security problems due to non-compliant  
>> malignant MP21 files.
>> Interoperability considerations: A number of interoperating  
>> implementations exist within the ISO/IEC 21000 community, and that  
>> community has reference software for reading and writing the file  
>> format.
>> Published specification: ISO/IEC 21000-9:2005
>> Applications which use this media type: Multimedia
>> Additional information:
>> Magic number(s): none
>>
>> File extension(s): mp21 and mpg21 are both declared at http:// 
>> pitch.nist.gov/nics/ and http://filext.com/
>>
>> Macintosh File Type Code(s): mp21 is registered with Apple.
>>
>> Person & email address to contact for further information: David  
>> Singer, singer at apple.com
>> Intended usage: COMMON
>> Author/Change controller: David Singer, ISO/IEC 21000 file format  
>> chair

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