[theora-dev] Frame rates in Theora header...

[illiminable]

I've got a few theora vids here... and looking at the headers it seems to me they say they play at 2 frames per second... but watching them they appear to to play at a faster rate. Theres also some that say they lpay at 1 fps.

Am i missing something here ?

I'm getting the info from here....
http://wiki.xiph.org/TheoraSpec

Is this header structure still valid ?

Heres a dump of the BOS Page..

Ver No      : 0
Head Flags  : 2
Granule Pos : 0
Serial No   : 723674224
Seq No      : 0
Checksum    : 3452830485
Num Segs    : 1
------------------------
Head Size   : 28
Data Size   : 42
Page Size   : 70
Num Packets : 1
------ Packet  0 (42 bytes) -------
00000000: 80 74 68 65 6F 72 61 03 02 00 00 16 00 12 00 01
00000016: 60 00 01 20 00 00 01 7D 78 40 00 0F 42 40 00 00
00000032: 00 00 00 00 00 00 00 00 34 C0                  
=========================================================

I'm getting the numerator from bytes 22-25 and denom from 26-29

ie.
numerator              denominator
01 7D 78 40          00 0F 42 40 

Which gives roughly 1.001 fps.

But looking in the file it looks like it gives roughly 6-8 frames per second of vorbis audio.

Is there some kind of multiplier i'm missing ?

Cheers.

Zen.

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