ffmpeg @4.0.3: Reversed (or previously applied) patch detected!
---> Applying patch-libavcodec-videotoolboxenc.c-drop-Nullable.diff
DEBUG: Environment:
CC_PRINT_OPTIONS='YES'
CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_multimedia_ffmpeg/ffmpeg/work/.CC_PRINT_OPTIONS'
CPATH='/opt/local/include'
LIBRARY_PATH='/opt/local/lib'
MACOSX_DEPLOYMENT_TARGET='10.9'
Executing: cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_multimedia_ffmpeg/ffmpeg/work/ffmpeg-4.0.3" && /usr/bin/patch -p0 < '/opt/bblocal/var/buildworker/ports/build/ports/multimedia/ffmpeg/files/patch-libavcodec-videotoolboxenc.c-drop-Nullable.diff'
DEBUG: system: cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_multimedia_ffmpeg/ffmpeg/work/ffmpeg-4.0.3" && /usr/bin/patch -p0 < '/opt/bblocal/var/buildworker/ports/build/ports/multimedia/ffmpeg/files/patch-libavcodec-videotoolboxenc.c-drop-Nullable.diff'
patching file libavcodec/videotoolboxenc.c
Reversed (or previously applied) patch detected! Assume -R? [n]
Apply anyway? [n]
Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file libavcodec/videotoolboxenc.c.rej
Command failed: cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_multimedia_ffmpeg/ffmpeg/work/ffmpeg-4.0.3" && /usr/bin/patch -p0 < '/opt/bblocal/var/buildworker/ports/build/ports/multimedia/ffmpeg/files/patch-libavcodec-videotoolboxenc.c-drop-Nullable.diff'
Exit code: 1
seeing this on mavericks also