I checked the footage (HDV 29.97) and set my project up to what I thought were the same parameters before importing the footage. I wasn't able to AMA link (comes from a somewhat outdated Sony Z5 camera), so I just dragged the clips into a bin and allowed AVID to transcode everything to MXF.
Now I'm editing in the timeline and a number of functions seem greyed out or otherwise unavailable, like speeding up clips, and making freeze frame.
If your footage does not match your project frame rate, your clips already have a speed effect on them (note the green dot) called a motion Adapter. If you want to adjust the speed, you will have to do it in a sequence by opening the motion effect editor,
If you want a freeze, find the frame you want and change the speed to zero.