Thread: [Libpgf-user] Missing header?

libPGF is an implementation of the Progressive Graphics File (PGF)

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libpgf-user

[Libpgf-user] Missing header?

From: bucketbot <buc...@ya...> - 2010-05-14 05:50:34

I'm trying to compile the PGF-codec demonstration but it uses a header file "PGFimage.h" that was not included in the archive? It's referenced in PGF.cpp.

Ideas? Did I miss something?

Thanks!

Re: [Libpgf-user] Missing header?

From: Raphael S. <rsc...@sc...> - 2010-05-14 08:41:23

The PGFconsole depends on libPGF, i.e. the files in libpgf-*-src.zip

Using MS Visual Studio the folder structure after extraction should look
like:

+---libpgf
│   +---doc
│   +---include
│   +---src
L---pgf
    +---dll
    +---doc
    +---include
    +---lib
    +---src

1.)  Compile libpgf  -> PGFCodec.lib (Release, Win32 configuration) or
PGFCodecd.lib (Debug) in libpgf\lib\Win32
2.) Compile pgf (the pgfconsole) using the header in libpgf\include and the
generated lib

Raphael

> -----Original Message-----
> From: bucketbot [mailto:buc...@ya...]
> Sent: Freitag, 14. Mai 2010 07:50
> To: lib...@li...
> Subject: [Libpgf-user] Missing header?
> 
> 
> I'm trying to compile the PGF-codec demonstration but it uses a header
file
> "PGFimage.h" that was not included in the archive? It's referenced in
> PGF.cpp.
> 
> Ideas? Did I miss something?
> 
> Thanks!

Re: [Libpgf-user] Missing header?

From: bucketbot <buc...@ya...> - 2010-05-16 22:25:13

Hi,

 Thanks! I didn't realise the headers weren't included - silly mistake. Once I downloaded the codec source, everything was fine.

 I put the codec into a VFW (AVI) wrapper. It seems to be working pretty well!

 Is it possible to do conversions with internal PGF functions? I'll want to be able to convert YCC<->RGB. Also, can I compress YCC images (for example, 'YUY2' 4:2:2 or 'YV12' 4:2:0 data)?

Thanks again!

--- On Fri, 5/14/10, Raphael Schweizer <rsc...@sc...> wrote:

> From: Raphael Schweizer <rsc...@sc...>
> Subject: Re: [Libpgf-user] Missing header?
> To: lib...@li...
> Date: Friday, May 14, 2010, 1:22 AM
> The PGFconsole depends on libPGF,
> i.e. the files in libpgf-*-src.zip
> 
> Using MS Visual Studio the folder structure after
> extraction should look
> like:
> 
> +---libpgf
> │   +---doc
> │   +---include
> │   +---src
> L---pgf
>     +---dll
>     +---doc
>     +---include
>     +---lib
>     +---src
> 
> 1.)  Compile libpgf  -> PGFCodec.lib (Release,
> Win32 configuration) or
> PGFCodecd.lib (Debug) in libpgf\lib\Win32
> 2.) Compile pgf (the pgfconsole) using the header in
> libpgf\include and the
> generated lib
> 
> Raphael
> 
> > -----Original Message-----
> > From: bucketbot [mailto:buc...@ya...]
> > Sent: Freitag, 14. Mai 2010 07:50
> > To: lib...@li...
> > Subject: [Libpgf-user] Missing header?
> > 
> > 
> > I'm trying to compile the PGF-codec demonstration but
> it uses a header
> file
> > "PGFimage.h" that was not included in the archive?
> It's referenced in
> > PGF.cpp.
> > 
> > Ideas? Did I miss something?
> > 
> > Thanks!
> 
> 
> ------------------------------------------------------------------------------
> 
> _______________________________________________
> Libpgf-user mailing list
> Lib...@li...
> https://lists.sourceforge.net/lists/listinfo/libpgf-user
>

Re: [Libpgf-user] Missing header?

From: Raphael S. <rsc...@sc...> - 2010-05-19 15:56:10

libPGF can be used with the following formats:
- YUV, packed, no subsampling (x:x:x) (i.e. YUY2, YV12 are not supported)
- the following image color modes compatible with Adobe Photoshop bitmaps: IndexedColor, GrayScale, RGBColor, CMYKColor, HSLColor, HSBColor, LabColor, RGB12, RGBA, Gray16, RGB16, RGB48, Lab48, CMYK64, Gray31

Other images must be converted first.

Raphael

> -----Original Message-----
> From: bucketbot [mailto:buc...@ya...]
> Sent: Montag, 17. Mai 2010 00:25
> To: lib...@li...
> Subject: Re: [Libpgf-user] Missing header?
> 
[...]
> 
>  Is it possible to do conversions with internal PGF functions? I'll want to be
> able to convert YCC<->RGB. Also, can I compress YCC images (for example,
> 'YUY2' 4:2:2 or 'YV12' 4:2:0 data)?
> 
> Thanks again!
> 
[...]

Re: [Libpgf-user] Missing header?

From: Raphael S. <rsc...@sc...> - 2010-05-26 15:28:01

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?