prueba.c:(.text+0x4bc): undefined reference to `av_open_input_file'
prueba.c:(.text+0x4ef): undefined reference to `dump_format'
prueba.c:(.text+0x57c): undefined reference to `avcodec_open'
prueba.c:(.text+0x594): undefined reference to `avcodec_frame_alloc'
collect2: error: ld returned 1 exit status



/// command line is:
gcc -o programa prueba.c -lavdevice -lavformat -lavfilter -lavcodec -lswscale -lavutil -lcurl -Wl,--no-undefined