Locating images in a powerpoint

[jondelac]

Hi ... Does anyone know how I can programatically locate images in a
powerpoint presentation? I am trying to write a program that saves all
the images that are pasted into a presentation as seperate files (I
dont care about the file names of the images... I just need the binary
image data)

Jon

 

[Bill Dilworth]

Have your software save the presentation as an HTML file, then delete any
non-picture format files from the HTML folder.


--
Bill Dilworth
A proud member of the Microsoft PPT MVP Team
Users helping fellow users.
http://billdilworth.mvps.org
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
vestprog2@ Please read the PowerPoint FAQ pages.
yahoo. They answer most of our questions.
com www.pptfaq.com
..

 

[jondelac]

Thanks... that's a good way to do it...

Do you know if there is anyway to do it with out converting the
document? Can I locate the image in the stream by parsing the compound
document format headers etc?

Thanks
Jon

 

[Bill Dilworth]

In 2007, you will be able to, but the internal file structures in previous
versions is not published.


--
Bill Dilworth
A proud member of the Microsoft PPT MVP Team
Users helping fellow users.
http://billdilworth.mvps.org
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
vestprog2@ Please read the PowerPoint FAQ pages.
yahoo. They answer most of our questions.
com www.pptfaq.com
..

 

[jondelac]

Thats because in 2007 they are in XML correct?

I have a parser that knows how to parse Compound Document Files and
spit out the directory streams. Parsing ppt documents I get a directoy
stream called "Pictures". I just dont know what format PPT is saving
those images in... Can you help?

Jon

 

[jondelac]

Great... that answers the question... I do see JFIF headers in the
stream so this this consistent with what I see. What is the other data
in the Pictures stream? Also, does this imply that PPT stores the
images in the format that they were introduced into the PPT
presentation as with no conversion?

Jon.

 

[jondelac]

Thanks Steve!

Do you by any chance know the compression they use on the other streams
like the PowerPointDocument stream?