robotpkg/image/opencv4 bulk build results

Missing system package libavcodec<8: searching in /usr/local missing: /usr/local/include/libavutil/ffversion.h missing: /usr/local/include/ffmpeg*/libavutil/ffversion.h searching in /usr found: /usr/include/x86_64-linux-gnu/libavutil/ffversion.h, wrong version 8.0.132 missing: /usr/include/libavutil/ffversion.h missing: /usr/include/x86_64-linux-gnu/libavutil/ffversion.h missing: /usr/include/ffmpeg*/libavutil/ffversion.h missing: /usr/include/x86_64-linux-gnu/ffmpeg*/libavutil/ffversion.h Please install the Ubuntu package libavcodec-dev. - SYSTEM_PREFIX or PREFIX.libavcodec can be set to the installation prefix of this package in robotpkg.conf.