. I was using the latest version (3.3) from ffmpeg.org, so I had a difficult time believing this. The only difference I can detect between now and a week ago is ffmpeg went from 3.2.? to 3.3.configure: error: The libavcodec library is too old. Please get a recent one from http://www.ffmpeg.org
Guessing that configure is not accurately detecting the libavcodec version number, I commented out the version check (lines 15969 - 15971) from configure I was able to complete the installation and am currently transcoding the BD of A Clockwork Orange.