问题
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 -vn -ac 2 -b:a 160k output1.mp3
This is the output of this command on one .wav format
I am getting the result but two things are different Overall bit rate mode and Writing library
- Writing library: LAME3.99.5 vs LAME3.100 ( I think this shouldn't make any problem?)
- bit rate mode Constant Vs variable
How to change bit rate mode from variable to Constant? and do I need to convert using the same Writing library?
Thanks!
回答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.
回答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)
来源：https://stackoverflow.com/questions/63133963/mpeg-audio-constant-bit-rate-conversion