D3D's "Render Scenes" script shipped with Poser 11 as standard. From the readme: "'Render scenes' is a batch render[er] for several scene files". Only for images, but the script is in plain text and hackable Python, and looks at first glance like it could be made to do what you want with a little hacking. 

It was not included in Poser 13.  Needs WX for its UI, and I vaguely recall that Apple banned WX on Macs (along with so much else)? So perhaps, 'Windows only'?

This simple Poser script for rendering a frame from multiple mo-cap files looks like it has some interesting code  ... https://gist.github.com/erfannoury/76c839b96ebd17aa2102

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Learn the Secrets of Poser 11 and Line-art Filters.