Mythtv fails to compile with 'error use of undeclared identifier av_estimate_timings'

The fix is supposedly:
1.delete the file /usr/X11R6
Result: /usr/X11R6 is a folder not a file. Nothing is symlinked in there either.
2. run make delete-old
Result: "don't know how to make delete-old" when run in the build folder or /usr/src.
3. Uninstall ffmpeg
Result: This wants to remove all of KDE and a lot of other packages.

So I can't continue compiling mythtv with these errors. Can someone think of a solution?
Last edited by a moderator:
You shouldn't have a /usr/X11R6 directory or otherwise. It was removed a very long time ago.

What version of FreeBSD?