As you describe in your example "Pictures" images in a presentatuion can be found in the shapes collection using
shape is PictureFrame
For me, this works only for embedded images but not in cases, the image is linked. In the powerpoint api picture and linked picture are different types of shapes.
What I need to do, is
o find the filename of the linked image
o create a copy of the image
o set the filename to the image copy
o make the filename relative to the presentation (norm. it's stored with a fully qualified name)
How can I achieve this using ASPOSE.Powerpoint?