I need to convert a 44KHz stero m4a audio file to 22KHz mono mp3 VBR file, how can I do that with ffmpeg on linux terminal? Thanks.
1 Answers
Gyan's comment is what I want, here is the full command line:
ffmpeg -i in.m4a -ac 1 -ar 22050 -c:a libmp3lame -q:a 9 out.mp3
with the option for VBR encoding. The number after -q:a specifies encoding quality (bitrate), with 0 being the best quality (largest file) and 9 being the worst quality (smallest file).
Here is the document on ffmpeg wiki.
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