[vorbis] What tags are allowed in ogg files?

John Morton jwm at plain.co.nz
Sun Jul 28 22:52:21 PDT 2002



On Mon, 29 Jul 2002 17:38, Michael Smith wrote:
> At 04:08 PM 7/28/02 +0200, you wrote:
> >I got it all to work now : )
> >
> >> You must update the page checksum(s), and potentially (only in rare
> >> cases) rewrite much of the ogg framing information for the entire file.
> >
> >In which rare cases are these?
> >And other framing information than the one that contains the header?
>
> If the comment header changes size by a large enough amount that you
> need to change the number of pages it is on (it's typically only on
> a single page, but if you have many or large comments that may not be
> possible), you need to update pretty much the whole file to fix up
> the page sequence numbers (and of course the checksums that change
> as a result).

BTW, have the standard library functions for writing vorbiscomment headers 
been changed to initially write padded headers, and attempt to update the 
comments in place on subsequent writes, or is this feature still on the 
wishlist?

John

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