I just noticed that the IPP audio-video-codecs samples are now dynamically linking with the MS run-time (/MD where it use to be /MT). Is this a new requirement? I've been using the libraries statically linked against the run-time so before trying to merge the samples into my code, I'd like to make sure there is no problem with static linking.
This is not a requirement. You can link against the Microsoft static or dynamic runtimes, independently of how you link against the IPP library files (i.e., you can mix the link modes).
This can be a little confusing if you are using the Visual Studio GUI to enable IPP. In this case the/MD and /MT options will be used to decide if the IPP libraries should also be linked statically or dynamically. This is a broad assumption made by the Visual Studio GUI-based configurationtool -- you don't have to do it this way-- but the tool assumes that if you link the Microsoft libraries using /MD you also want to link dynamically with the IPP libraries, etc.
There is nothing in the IPP libraries that requires that link dynamically with the Microsoft runtime libraries.