It opens .stk, but will it ever be supported to open .piv? What are the projects. Most of the characters that I use on the internet are inside a .piv and are “embedded pieces”. They use the Pivot join function. Since the pivot has no sounds and no camera, it would be nice if Synfig opened .piv
-Google translator
Pivot Animator doesn’t share publicly its file format .PIV and it isn’t an open source software so we can take a look at its source code to discover it.
So it isn’t probably to offer such support. 