[vorbis-dev] Ogg as container format

[Marshall Eubanks]

>On Tuesday, October 2, 2001, at 01:18 , Kevin Marks wrote:
>
>> Here you seem to imply that the packets are to do with RTP networking 
>> units. For DV do you use the DV RFC to decide these? Or are they 
>> arbitrary? You have 2 size-limited structures overlaid on each other, 
>> neither of which necessarily corresponds to a fundamental data unit of 
>> the underlying media.
>
>It sounds like you're still not understanding the intention. Packets are 
>the fundamental units of data the encoder produces. In the case of 
>vorbis, we use the same packets for rtp and for ogg, and I believe they 
>were deliberately chosen to be of a size that made that practical. For 
>other formats one is free to choose whatever's convenient.
>
>Pages are the framing, sync, interleave and error detection layer. They 
>do that on whatever opaque packets the codec gives it. Packets can span 
>pages, so the 64k size limit applies only to how the framing layer 
>works, not what the codec sees.
>
>Which RFC talks about the DV format? I thought the spec was payware from 
>smpte.
>
It's still a draft :

http://www.ietf.org/internet-drafts/draft-ietf-avt-dv-video-04.txt

Marshall

>>
<snip>
Marshall Eubanks

tme at 21rst-century.com

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