[Cin] mp2 audio profile

[Andrew Randrianasulu]

put in ffmpeg/audio

may be you can change codec (second mp2) to libtwolame, different ffmpegs
offer different versions when I query for mp2 encoder

A..... mp2                  MP2 (MPEG audio layer 2)
 A..... mp2fixed             MP2 fixed point (MPEG audio layer 2) (codec
mp2)
 A..... libtwolame           libtwolame MP2 (MPEG audio layer 2) (codec mp2)

from desktop (v 4.4.4)

A....D mp2                  MP2 (MPEG audio layer 2)
 A....D mp2fixed             MP2 fixed point (MPEG audio layer 2) (codec
mp2)

from termux (v 6.1)
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