[mpg123-users] libmpg123 opens non-mp3 files

[Martin G. <mar...@gm...>]

Hi!
   I'm writing a soundfile visualization program that tries to open
audio files first with libmpg123 then, is it fails, with libsndfile
then, if that fails, with libav but I'm finding that libmpg123
"succeeds" in opening some files, wav and ogg, but the returns the file
length as 0.048 seconds but fails to return any meaningful audio data.
   I'm doing mpg123_open() and mpg123_getformat() and, if either fail,
falling back to the other libs. That was enough for one wav which it
thought it could open but failed to get the format for, but foranother
two both succeed, giving me garbage.
   Is this expected behaviour, and is there anything I can do better to
detect that it's not an mp3 file?
   In case it's useful, the audio files in question are visible under
martinwguy.net/test where "Renzo Arbore..." is the one where open()
succeeds but get_format() fails, but with the other two both succeed.

Thanks!

    M