[theora-dev] Theora packets with granulepos of -1

[ogg.k.ogg.k at googlemail.com]

> 00:00:11.266: serialno 0000025769, calc. gpos 129|40, packetno 171: 1.013
> kB
>
> So why it shows "calc. gpos"? I think this means oggzdump has to calculate

Ogg tracks granpos at the page level, so this happens if there is more than
one packet ending on the same page, I believe. Not sure which layer is
supposed to interpolate granpos though.