CODEWITHSUNDEEP
audioffmpegsignal-processingsoxlibrosa
Aaditya Ura
Aaditya Ura

Reputation: 12669

MPEG Audio Constant bit rate conversion

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

The desired .mp3 format is :

enter image description here

I tried with FFmpeg with this code :

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

This is the output of this command on one .wav format

enter image description here

I am getting the result but two things are different Overall bit rate mode and Writing library

How to change bit rate mode from variable to Constant? and do I need to convert using the same Writing library?

Thanks!

Upvotes: 1

Views: 1367

Answers (2)

Gyan
Gyan

Reputation: 92928

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.

Upvotes: 2

Aaditya Ura
Aaditya Ura

Reputation: 12669

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)

Upvotes: 0

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