[herbert@myhost convert_flv]$ make
g++ -m64 -Wl,-O1,--sort-common,--as-needed,-z,relro,--hash-style=gnu -o convert_flv tut1.o    -L/usr/lib /home/herbert/convert_flv/ffmpeg/install/lib/*.a -lQtGui -lQtCore -lpthread
tut1.o: In function `main':
/home/herbert/convert_flv/tut1.cpp:71: undefined reference to `av_register_all()'
/home/herbert/convert_flv/tut1.cpp:74: undefined reference to `av_open_input_file(AVFormatContext**, char const*, AVInputFormat*, int, AVFormatParameters*)'
/home/herbert/convert_flv/tut1.cpp:78: undefined reference to `av_find_stream_info(AVFormatContext*)'
/home/herbert/convert_flv/tut1.cpp:82: undefined reference to `dump_format(AVFormatContext*, int, char const*, int)'
collect2: ld returned 1 exit status
make: *** [convert_flv] Error 1
[herbert@myhost convert_flv]$ ls /home/herbert/convert_flv/ffmpeg/install/lib/
libavcodec.a   libavfilter.a  libavutil.a   pkgconfig
libavdevice.a  libavformat.a  libswscale.a
[herbert@myhost convert_flv]$