Command line utility for English to IPA phonetic transcription

Question

A quick search returned just a few web services and one commercial GUI application:

upodn.com/phon.asp:

photransedit.com/Online/Text2Phonetics.aspx (via wiki Phonetic transcription):

Phonetizer:

_{ATM english.SE has five questions tagged software, and the single one that wasn't about usage was closed as off-topic.}