MPEG Audio Constant bit rate conversion

Question

I am trying to convert few .wav files to .mp3 format

The desired .mp3 format is :

I tried with FFmpeg with this code :

ffmpeg -i input.wav -         


        

Answer 1

The output using ffmpeg -i input.wav -vn -ac 2 -b:a 160k output1.mp3 is constant bit rate, however ffmpeg writes a header with the title Xing and Mediainfo infers that to indicate VBR. Disable writing that header if you want Mediainfo to detect Constant bit rate.

ffmpeg -i input.wav -vn -ac 2 -b:a 160k -write_xing 0 output1.mp3

Note that the actual MP3 encoding won't change.

Answer 2

I ended up using sox instead of FFmpeg :

sox -t wav -r 48000 -b 16 -c 2 file.wav -C 160 -t mp3 sock33.mp3

• Sample rate of 48 kHz (-r 48000)
• two channel (-c 2)
• 16 bits bit depth (-b 16)