Below are my settings and Crop Image Data to Frames is checked. Gessing this only crops bitmapped images and not PDFs in InDesgin frames.
I also tried in InDesign
Object >> Object Export Images
Somewhere between 150 & 200 dpi is acceptable for these pdfs, but cropping the images is the main issue I want to resolve.
rasterize the image as an alternative to above
If this is just for preview you could flatten and rasterize the entire page to 150ppi and that will likely make a much smaller file size depending on the complexity of the vectors in the package design. I think you'll just have to try. To get the page to rasterize there needs to be a transparent object somewhere on the page, so you could put a small rectangle on the master page and set it to 0 transparency.
Make sure there's no 4-channel CMYK
Force all rasters to 150ppi and flatten the page via Acrobat 4 compatibility. If you have transparent effects in the design you might get stitching:
Make an all raster flattener preset
I tested a single page with the above and got 456k to 87k
Thank you Rob this is very helpful. My file size went from 8.9mb to 6.7mb with your method at 200 dpi. When I attach 6.7mb goes to 8.6mb in outlook, I assume this is either a false positive or has to do with block size and attachment going through email server.
Will try 150 dpi, but have to put out some other fires. Would still like the ability to individually rasterize objects within InDesign, so looking for more input, please reply as Adobe really should address this issue which could significantly cut internet traffic, or minimally add an option to making PDFs to bitmap the file. I remember doing this on the PC with the PDF writer, but not sure if tag option exists in InDesign.
Will try 150 dpi, but have to put out some other fires.
Just remember the flattener preset is going to drive the resolution of vectors converted into rasters, so you have set the res in both places. And the compression setting should have more effect because of the repeating pixels, but I'm not sure it will always work to flatten and rasterize everything—I think it really depends on the complexity of the AI drawings.
Do you really have to do email? You can't use Dropbox? Or post the PDF so the client can view in a browser?
So 150 dpi gave me a 4.2mb rather than 6.7mb, that is really good. But the quality of our companies brand marks on the bottom of each page looks poor, so will have to work on this. If anyone has a way to target a specific graphic to bitmap/rasterize in InDesgin, please reply.
Below is a sample of our logo looking blurry.