Lately I’ve been receiving a number of files in pptx format, but I present using my iPad and so convert these presentations to Keynote. If the slides contain images and text only, this conversion is relatively painless – usually there are just a few formatting and alignment issues that need to be addressed and then I’m good to go. All I need do is open the pptx file in keynote, either on my Mac or iPad, and Keynote handles the conversion quite well.
If, however, the presentation contains media, then this process will not transfer across the video presentations, and I end up with an image snapshot of the video in the slide as a placeholder where the video used to be (or an image of a play symbol, if the media is an audio file).
In order to access media files embedded within pptx files, follow these steps (and they work on both Windows machines and Macs):
Make a copy of the pptx file.
Rename the pptx file – change the extension from ‘pptx’ to ‘zip’.
You will probably get a message warning you about the change of extension. Make sure you allow the change so that the file name will end in ‘.zip’.
Extract the zip file (or browse the zip file contents). You will see a directory structure now present in the folder. Navigate to ppt > media and all your image and media files will be present. You can now copy these files (and convert, if necessary) for use in other presentation mediums.