[theora-dev] question about ogg mapping
giles at xiph.org
Thu Jun 12 02:43:53 PDT 2003
On Thursday, June 12, 2003, at 03:28 am, Dan Miller wrote:
> Question: is it permissible to put more than one frame packet into a
> page? At 30 fps, Ogg page overhead is on the order of 8 - 10
> kbits/sec. At low datarates, this is going to be unacceptable.
Yes that's fine. There wouldn't be any point to having pages if they
weren't different from packets, and as you suggest, it's necessary to
keep the overhead down.
> If I shove a few frames into a page, how does this affect the
> granulepos stuff?
It's actually pages that have granulepos. The granulepos in the packet
structure is just how they're passed to the ogg layer. Granulepos is
'the total samples encoded after including all packets finished on this
page', so libogg sets the page granulepos to the greatest granulepos of
the packets that ended on that page.
--- >8 ----
List archives: http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'theora-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body. No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.
More information about the Theora-dev