Find image placed in Powerpoint 16 file's slide.xml file - powerpoint

Question

So I have upzipped a Powerpoint 16 presentation and I am looking at the XML from a slide from the ppt/slides/ directory. I am searching for a reference to the image that is place on this slide, I THINK it is one of the <a:ext uri= references, but if it is I have no clue how to decode that URI into something readable. I just need the name of the image placed in the file. I am currently working on these files as text files mostly from the command line or using BBEdit.
<p:sld xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main"><p:cSld><p:spTree><p:nvGrpSpPr><p:cNvPr id="1" name=""/><p:cNvGrpSpPr/><p:nvPr/></p:nvGrpSpPr><p:grpSpPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="0" cy="0"/><a:chOff x="0" y="0"/><a:chExt cx="0" cy="0"/></a:xfrm></p:grpSpPr><p:sp><p:nvSpPr><p:cNvPr id="2" name="Title 1"><a:extLst><a:ext uri="{FF2B5EF4-FFF2-40B4-BE49-F238E27FC236}"><a16:creationId xmlns:a16="http://schemas.microsoft.com/office/drawing/2014/main" id="{B8809CFD-BA0C-B949-842F-AF9DC6782107}"/></a:ext></a:extLst></p:cNvPr><p:cNvSpPr><a:spLocks noGrp="1"/></p:cNvSpPr><p:nvPr><p:ph type="title"/></p:nvPr></p:nvSpPr><p:spPr><a:xfrm><a:off x="1425631" y="380758"/><a:ext cx="7103533" cy="927452"/></a:xfrm></p:spPr><p:txBody><a:bodyPr><a:noAutofit/></a:bodyPr><a:lstStyle/><a:p><a:r><a:rPr lang="en-US" dirty="0"/><a:t><Module Title></a:t></a:r></a:p></p:txBody></p:sp><p:sp><p:nvSpPr><p:cNvPr id="8" name="Rectangle 7" title="keystrokekeystrokekeystroke"><a:extLst><a:ext uri="{FF2B5EF4-FFF2-40B4-BE49-F238E27FC236}"><a16:creationId xmlns:a16="http://schemas.microsoft.com/office/drawing/2014/main" id="{2D7DBD16-C48C-A14E-A06C-D1FA8D4D56EB}"/></a:ext></a:extLst></p:cNvPr><p:cNvSpPr/><p:nvPr/></p:nvSpPr><p:spPr><a:xfrm><a:off x="1153056" y="1471353"/><a:ext cx="6837888" cy="4542163"/></a:xfrm><a:prstGeom prst="rect"><a:avLst/></a:prstGeom></p:spPr><p:style><a:lnRef idx="2"><a:schemeClr val="accent1"><a:shade val="50000"/></a:schemeClr></a:lnRef><a:fillRef idx="1"><a:schemeClr val="accent1"/></a:fillRef><a:effectRef idx="0"><a:schemeClr val="accent1"/></a:effectRef><a:fontRef idx="minor"><a:schemeClr val="lt1"/></a:fontRef></p:style><p:txBody><a:bodyPr rtlCol="0" anchor="ctr"/><a:lstStyle/><a:p><a:pPr algn="ctr"/><a:r><a:rPr lang="en-US" dirty="0"/><a:t>Module Open Image</a:t></a:r></a:p></p:txBody></p:sp><p:sp><p:nvSpPr><p:cNvPr id="3" name="Shape_27"><a:extLst><a:ext uri="{FF2B5EF4-FFF2-40B4-BE49-F238E27FC236}"><a16:creationId xmlns:a16="http://schemas.microsoft.com/office/drawing/2014/main" id="{29E47EB4-A9BC-C843-A78D-94CF7CDCFA5D}"/></a:ext></a:extLst></p:cNvPr><p:cNvSpPr/><p:nvPr/></p:nvSpPr><p:spPr><a:xfrm><a:off x="1153056" y="1471353"/><a:ext cx="6837888" cy="4542163"/></a:xfrm><a:prstGeom prst="rect"><a:avLst/></a:prstGeom><a:blipFill><a:blip r:embed="rId2"/><a:stretch><a:fillRect/></a:stretch></a:blipFill></p:spPr><p:style><a:lnRef idx="2"><a:schemeClr val="accent1"><a:shade val="50000"/></a:schemeClr></a:lnRef><a:fillRef idx="1"><a:schemeClr val="accent1"/></a:fillRef><a:effectRef idx="0"><a:schemeClr val="accent1"/></a:effectRef><a:fontRef idx="minor"><a:schemeClr val="lt1"/></a:fontRef></p:style><p:txBody><a:bodyPr rtlCol="0" anchor="ctr"/><a:lstStyle/><a:p><a:pPr algn="ctr"/><a:endParaRPr lang="en-US"/></a:p></p:txBody></p:sp></p:spTree><p:extLst><p:ext uri="{BB962C8B-B14F-4D97-AF65-F5344CB8AC3E}"><p14:creationId xmlns:p14="http://schemas.microsoft.com/office/powerpoint/2010/main" val="331219587"/></p:ext></p:extLst></p:cSld><p:clrMapOvr><a:masterClrMapping/></p:clrMapOvr></p:sld>
So am I close? Is it one of those URI's? If so, how do I decode it? If it is not one of those URI's then were would I find a reference to the slide on the file. I have done the obvious and searched the entire pptx zip file and have not found anything with .jpg in the text that references a file.
I realize this is a lot to ask in a single question, and for that I am sorry. I am just sort of lost at the moment.

Answer 1

For readable XML, look into a text editor like NotePad++, where you can prettify the text into indented lines.
There's no photo on this. There's a title "Module Title", a rectangle colored in Accent 1 with the text "Module Open Image", and another shape, also colored in Accent 1 but without text.
Here's what a slide with a picture looks like:
<p:sld xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main">
<p:cSld>
<p:spTree>
<p:nvGrpSpPr>
<p:cNvPr id="1" name=""/>
<p:cNvGrpSpPr/>
<p:nvPr/>
</p:nvGrpSpPr>
<p:grpSpPr>
<a:xfrm>
<a:off x="0" y="0"/>
<a:ext cx="0" cy="0"/>
<a:chOff x="0" y="0"/>
<a:chExt cx="0" cy="0"/>
</a:xfrm>
</p:grpSpPr>
<p:pic>
<p:nvPicPr>
<p:cNvPr id="5" name="Picture 4">
<a:extLst>
<a:ext uri="{FF2B5EF4-FFF2-40B4-BE49-F238E27FC236}">
<a16:creationId xmlns:a16="http://schemas.microsoft.com/office/drawing/2014/main" id="{0966E3E9-FCFA-4DDB-B218-46F441B47F87}"/>
</a:ext>
</a:extLst>
</p:cNvPr>
<p:cNvPicPr>
<a:picLocks noChangeAspect="1"/>
</p:cNvPicPr>
<p:nvPr/>
</p:nvPicPr>
<p:blipFill>
<a:blip r:embed="rId2"/>
<a:stretch>
<a:fillRect/>
</a:stretch>
</p:blipFill>
<p:spPr>
<a:xfrm>
<a:off x="4388972" y="1200719"/>
<a:ext cx="3414056" cy="4456562"/>
</a:xfrm>
<a:prstGeom prst="rect">
<a:avLst/>
</a:prstGeom>
</p:spPr>
</p:pic>
</p:spTree>
<p:extLst>
<p:ext uri="{BB962C8B-B14F-4D97-AF65-F5344CB8AC3E}">
<p14:creationId xmlns:p14="http://schemas.microsoft.com/office/powerpoint/2010/main" val="2510507612"/>
</p:ext>
</p:extLst>
</p:cSld>
<p:clrMapOvr>
<a:masterClrMapping/>
</p:clrMapOvr>
</p:sld>
The picture is not stored in the slide, it is only referenced. <a:blip r:embed="rId2"/> is the reference. Embedded photos are renamed and stored in the media folder. To find its format, you would check the slideX.xml.rels file (where X is the same slide number as the one you're checking) for rId2 to find that it is called image1.png inside the file.