[Ffmpeg-devel] Compilation with --enable-theora fails

Måns Rullgård mru
Wed May 11 19:00:12 CEST 2005

Rich Felker <dalias at aerifal.cx> writes:

> On Wed, May 11, 2005 at 05:11:32PM +0200, M?ns Rullg?rd wrote:
>> > IMO we should abandon the old libogg based one. Unfortunately I don't
>> > know how Xiph has done the granulepos for Theora, but if you say it's
>> > incredibly insane I won't be surprised..
>> The granulepos is the frame number of the last keyframe shifted left
>> by a variable amount (specified in the header) plus the number of
>> frames since the last keyframe.
> When you say the frame number of the keyframe, do you mean just
> counting keyframes, or counting all frames?

Counting all frames.

> BTW this is the most incredibly idiotic thing I've ever heard
> of.. is it just an ugly hack to make up for the lack of a keyframe
> flag and index?

It's even worse.  Keyframes are signaled differently.

M?ns Rullg?rd
mru at inprovide.com

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