[MEncoder-users] Flashvideo for YouTube using mencoder

[Rich Felker]

On Fri, Feb 22, 2008 at 06:12:22PM +0100, Ben wrote:
> On Fri, Feb 22, 2008 at 5:18 PM, Reimar Döffinger
> <Reimar.Doeffinger at stud.uni-karlsruhe.de> wrote:
> 
> >  Uh... I thought it was rather obvious that the question is quality _at a
> >  fixed bitrate_.
> >  Otherwise we'd all be using uncompressed video...
> 
> Still, a keyframe is the frame saved in high(er) quality, as I stated before.

This is simply false.

> So which ever way you put it; Having more keyframes in a movie
> would yield an improvement up to the point where it's needed.

No, because each keyframe uses as many bits as 10-100 nonkey frames
and thus to keep the bitrate the same you have to lower the quality
globally.

> The number this was about is the space between keyframes.
> That might be confusing some people. It's not setting the amount
> of keyframes, it's setting the interval between keyframes. So,
> the higher the keyint, the fewer keyframes are in a movie.

Naturally. There is no confusion here except your own.

Rich