[MPlayer-dev-eng] Re: [PATCH] theora support
D Richard Felker III
dalias at aerifal.cx
Tue May 20 15:57:40 CEST 2003
On Tue, May 13, 2003 at 12:49:52AM -0400, Monty wrote:
>
> > 1. keyframe detection in demux_ogg_seek should use the theora stream
> > handler's theora-state for properly determining keyframes
> >
> > theora's method of encoding keyframe information is unbelievably
> > stupid:
>
> If you have first-class ogg demuxing, you get keyframes for free. You
> can seek to any keyframe, by number, in Olg(n) time (for files of a
> few GB, that's still faster than decoding a frame), no syncpoint table
> necessary.
This is blatently false if the media is slow. Think cdrom drive with
inefficient seeks. Binary search thru the whole file could easily take
15+ seconds, which is total nonsense.
Rich
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