[NTLUG:Discuss] command line barcode decoding

[Richard]

the libdmtx.org project is almost what I am looking for --

man dmtxread   "dmtxread searches the named input FILEs for ECC200 Data 
Matrix barcodes, reads their contents, and writes the decoded messages 
to standard output."

That is exactly the functionality that I want except I need to decode  
1D barcodes -- specifically Code128

I'm going in circles on Google and Sourceforge.  Maybe my search terms 
are not correct.    Does anyone know of a utility that can be executed 
in bash to read a PDF, and extract the bar code data to STDOUT?