rune@toshiba:~/apps/mplayer$ make
make -C libavformat LIBPREF=lib LIBSUF=.a
make[1]: Entering directory `/home/rune/apps/mplayer/libavformat'
cc -I../libavcodec  -c -o utils.o utils.c
In file included from avformat.h:36,
                 from utils.c:21:
../libavcodec/avcodec.h:34:20: error: avutil.h: No such file or directory
In file included from avformat.h:36,
                 from utils.c:21: