MW 1.31.1 running on Windows Server 2012 R2 IIS 8.5
I'm getting the following error (from $wgDebugLogFile output log file) for all execution of pdfinfo and pdftotext.
[exec] Error running "pdfinfo" "-enc" "UTF-8" "-meta" "C:/inetpub/wwwroot/w/images/f/f4/Phone_List.pdf": 'pdfinfo" "-enc" "UTF-8" "-meta" "C:' is not recognized as an internal or external command, operable program or batch file.
I'm not sure if this is the result of the new Shell framework introduced in 1.30, Manual:Shell framework, which replaces wfShellExec(). The debug log line before the error is:
[exec] MediaWiki\Shell\Command::execute: "pdfinfo" "-enc" "UTF-8" "-meta" "C:/inetpub/wwwroot/w/images/f/f4/Phone_List.pdf"