[FFmpeg-user] ffmpeg-opus install related question

[bat guano]

i am unable to use the "-f opus" to create an opus file.    

./ffmpeg  -i /home/mark/tester.wav * -f  opus*  /home/mark/tester2.opus   ;

Hi
Use a command like this:-

ffmpeg -i tester.wav -c:a libopus -b:a 64k -ar 48000 -ac 2 tester2.opus