"2464px x 1632px which means I lose the top and bottom of the frames when converted to 1920 x 1080."
Hi Christine, Im no math genious but if your image is width (side to side) 2464 and is placed in a sequence that is 1920, you are losing 544 pixels total. So that would explain why you are losing image on the sides of your animation.
Now if you are importing individual jpegs and not a movie file. I think to scale things you might want to import everything, create a sequence that fits the format and size of your jpegs (Custom), then "Nest" the sequence you created in a standard HD size sequence and resize the nest as desired.
I guess you could scale the nested sequence to fit the HD size exactly but that will introduce distortion into it. Or you could scale the 2464 to fit the 1920 and just get a little more black borders on the top and bottom. That might be the best option. That letter box look is very acceptable these days.
I have shot most of it on my Nikon camera which shoots at 2464px x 1632px which means I lose the top and bottom of the frames when converted to 1920 x 1080.
I would recommend creating a custom sequence setting that
matches the native resolution of the images (2464px x 1632).
In the New Sequence dialog, click on the Settings tab.
Change the Editing Mode to Custom, and then you can
change whatever parameters you like.
If it's a setting you'll want to reuse, save it as a custom preset
so you can go back to it quickly.
If your images are sequentially numbered, you can isolate and
import a selected range of images and use the Interpret Footage
dialog to set the desired frame rate for each individual sequence.
Welcome to the forum.
Though PrPro CS 5/5.5 does a good job of Scaling, there is still the matter of the overhead involved with Still Images, that are larger, than you need.
Personally, I would use Photoshop to Scale all of your Stills, as you are using a bunch. You can easily write an Action to do almost everything automatically, and then use Joe's suggestion on Numbered Stills.
Much of the success with stop-motion will be your Duration, and also your subject and your "vision." In very general terms, I usually go with 3 - 5 Frames for the Duration. In PrPro CS 5/5.5, you can change that Duration in the Project Panel, but I like to set the Stills Duration in Ediit>Preferences, before Import.
For, say a 5 Frame Duration, I'd possibly add Cross-Dissolve Transitions of 4 Frames Duration.
Good luck, and I think that when you do the initial Image manipulation in PS, and then Joe's suggestion, you will be happier.
Oh, I forgot. This ARTICLE goes into more detail on Scaling in PS, and automating things. Overlook the intial numbers, as it was written back when SD material was the norm. You will Scale (and Crop) to an HD Frame Size.