我需要将音频从 .mp3 转换为 .gsm

Question

I need to convert from.mp3 to.gsm (preferably with ffmpeg). I used it for several different formats but with this isn't as simple as it was with the others. I don't know what parameters I'm missing.

I tried using ffmpeg with the following comand:

ffmpeg -i ".\example.mp3" ".\example.gsm"

But it shows me the following error:

Sample rate 8000Hz required for GSM, got 44100Hz Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height Conversion failed!

Answer 1

ffmpeg -ar 8000 -ac 1 -i ".\example.mp3" ".\example.gsm"

-ar sample rate -ac audio channel