When you say cropped, do you mean that the photos are larger than the video frame? Or do you mean that they fill the video frame but the top and bottom of the photo is being cut off?
If so, what is the measurement, in pixels, of the height and width of your photos. In my books, I recommend that you never use photos larger than 2500x1875 pixels in size (72 ppi) for high-def or 1000x750 pixels for a DVD.
How do you plan to output and share this video? That will determine what settings we recommend for your photo sizes and project settings.
Might want to delete the 72ppi sometime. Has no meaning in video. Its for printing. Its all about hight and width.
You are correct, Ann. The only thing that matters in video is the measurement of the picture, in pixels. But, just because sometimes people wonder what the ppi should be, it doesn't hurt to use 72 ppi. Although ultimately you can use any ppi setting you want and the results will be the same.
I'm sure Steve is weary of me chiming in on this. But, before Steve and Bill Hunt tried to teach me to resize photos for Premier Elements, I made "slideshows" without that. Further, much to my surprise, my computer reported that an ACR (Adobe Camera Raw) update was applied to BOTH Photoshop Elements and Premier Elements. I continue to use photo files without resizing.
It may once have been a good idea if one's computer was particularly slow or weak. I'm imported everything from smartphone JPEGs to monster RAW files with no resizing.
For this OP, my guess is the project settings are the issue. Could it be that since "importing photographs onto a music recording" that something has locked in the project settings that don't process the photos correctly? Are 4x3 photos being put in a 16x9 project? Another guess is the photos have been cropped to frame ratios that don't match the frame ratio of the video project?
I have found out that the size of a photograph must be standard size, and if it is not, you must make the margin be standard size or approximately standard size. Thank-you for your comments.