ffmpmeg audio covert

1. ffmpeg -i filename.mp3 newfilename.wav
2.  ffmpeg -i INPUT -f alsa hw:1,7
3.  ffmpeg -i INPUT -f alsa default
4. ffmpeg -re  -i speaker.aac -f wav -ar 48000 -y ee.wav
5. sndfile-resample -to 48000 -c 2 error1.wav e2.wav

Reference:

1. http://manpages.ubuntu.com/manpages/xenial/man1/ffmpeg-devices.1.html
2. https://www.howtoforge.com/tutorial/ffmpeg-audio-conversion/
3. linux/ALSA SRC重采样造成的问题及解决

keyword: alsa, resample, ffmpeg, sndfile-resample, sox, resample, alsa hw