In file included from <gst-ffmpeg>/gst-libs/ext/libav/libavutil/avutil.h:318:0,
                 from <gst-ffmpeg>/gst-libs/ext/libav/libswscale/swscale.h:30,
                 from <gst-ffmpeg>/ext/libswscale/gstffmpegscale.c:26:
<gst-ffmpeg>/gst-libs/ext/libav/libavutil/common.h:38:32: fatal error: libavutil/avconfig.h: No such file or directory
compilation terminated.