/usr/src/ffmpeg $ sudo make install
INSTALL	doc/ffmpeg.1
INSTALL	doc/ffprobe.1
INSTALL	doc/ffserver.1
INSTALL	doc/ffmpeg-all.1
INSTALL	doc/ffprobe-all.1
INSTALL	doc/ffserver-all.1
INSTALL	doc/ffmpeg-utils.1
INSTALL	doc/ffmpeg-scaler.1
INSTALL	doc/ffmpeg-resampler.1
INSTALL	doc/ffmpeg-codecs.1
INSTALL	doc/ffmpeg-bitstream-filters.1
INSTALL	doc/ffmpeg-formats.1
INSTALL	doc/ffmpeg-protocols.1
INSTALL	doc/ffmpeg-devices.1
INSTALL	doc/ffmpeg-filters.1
INSTALL	doc/libavutil.3
INSTALL	doc/libswscale.3
INSTALL	doc/libswresample.3
INSTALL	doc/libavcodec.3
INSTALL	doc/libavformat.3
INSTALL	doc/libavdevice.3
INSTALL	doc/libavfilter.3
INSTALL	doc/ffmpeg.1
INSTALL	doc/ffprobe.1
INSTALL	doc/ffserver.1
INSTALL	doc/ffmpeg-all.1
INSTALL	doc/ffprobe-all.1
INSTALL	doc/ffserver-all.1
INSTALL	doc/ffmpeg-utils.1
INSTALL	doc/ffmpeg-scaler.1
INSTALL	doc/ffmpeg-resampler.1
INSTALL	doc/ffmpeg-codecs.1
INSTALL	doc/ffmpeg-bitstream-filters.1
INSTALL	doc/ffmpeg-formats.1
INSTALL	doc/ffmpeg-protocols.1
INSTALL	doc/ffmpeg-devices.1
INSTALL	doc/ffmpeg-filters.1
INSTALL	doc/libavutil.3
INSTALL	doc/libswscale.3
INSTALL	doc/libswresample.3
INSTALL	doc/libavcodec.3
INSTALL	doc/libavformat.3
INSTALL	doc/libavdevice.3
INSTALL	doc/libavfilter.3
install: cannot stat `/usr/local/share/man/man3/libavutil.3': Input/output error
doc/Makefile:151: recipe for target 'install-man' failed
make: *** [install-man] Error 1