P4VC: Accessing Visual Tools Anywhere
One unheralded feature of the 2012.1 release is p4vc, which is included with the P4V installer. p4vc lets you access many of P4V's visual tools like Revision Graph and Time-Lapse View from the command line. It's also easy to launch via a system call in a custom tool, so you can for example launch Revision Graph from your favorite text editor:
p4vc revgraph jam.c
Grab the 2012.1 release and give it a try! Just open a command prompt and type p4vc help commands to get started.