What does the argument -ab in ffmpeg mean?

Question

From someone I received a batch file that can do ffmpeg conversion using 2 command arguments. Let's say the file is called convert.sh and only contains this line:

ffmpeg -ss 0 -t 36000 -i "$1" -ar 8000 -ab 16K -ac 1 -y "$2"

I call it as follows:

sh convert.sh inputfile.wav outputfile.wav

In the ffmpeg documentation, I can find what all arguments mean, except for -ab. I guess 16K is its value. But I have no idea what it does. Anyone?

Answer 1

-ar- set the audio sampling frequency

-ac- Set the number of audio channels

-ab- Set the audio bitrate

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Answer 2

-ab argument means audio bitrate