You may want to
Code:
cd /usr/ports/multimedia/ffmpeg && make config
and deselect opencv-core, it is a new dependency sort of huge. And your post indicates that it is "cmake" and not ffmpeg which is failing to build... cmake being required for opencv-core. So by deselecting opencv in ffmpeg, maybe not requiring cmake (another issue for you to ignore? fix?) maybe ffmpeg rebuilding would fix musicpd ... OTOH I know absolutely nothing about opencv-core other than the fact that it requires cmake...