Re: [Libpgf-user] Missing header?

[Raphael S. <rsc...@sc...>]

The short answer: no

The not so short answer:
Currently, there is no way to set an arbitrary bitrate, i.e. the final file
size. In theory it should be sufficient to somehow estimate a quality level
and truncate the file at the end of a pyramid level. This would allow for
maximum quality encoding with a limited file size. The estimation problem is
equivalent, i.e. if we knew a way to predict the file size for a particular
image and q level, we might as well use this to calculate the q level
required for a given bitrate and vice versa. We do have this on our long
term feature request list, however.

Raphael

> -----Original Message-----
> From: bucketbot [mailto:bucketbot@...]
> Sent: Freitag, 21. Mai 2010 10:46
> To: Raphael Schweizer
> Subject: Re: [Libpgf-user] Missing header?
> 
> 
> Thanks for the information, Raphael. I'll see what I can do with it. One
last
> question: is there any way to apply quantisation in a way that will let me
> determine an approximate file-size, rather than simple integer-based
> quantisation? Or is there a fast way (a shortcut) to estimate the final
size for
> a particular Q level?