There are two recent tickets which, I believe, involve the same error: ffmpeg and ffmpeg-devel immediately crash with segfault 11 when input is mp4: https://trac.macports.org/ticket/59750 <https://trac.macports.org/ticket/59750>
ffmpeg @4.2.1 crash using -vcodec libx264: https://trac.macports.org/ticket/59390 <https://trac.macports.org/ticket/59390>
