Cannot suppress warnings when decoding mp3

[sammlapp]

I get tons of messages like

[src/libmpg123/layer3.c:INT123_do_layer3():1801] error: dequantization failed!
Warning: Xing stream size off by more than 1%, fuzzy seeking may be even more fuzzy than by design!

which seem to be from mpg123. Is it possible to add a flag to suppress them?

see also https://github.com/libsndfile/libsndfile/issues/958