#125 Why Unsupported Format Type?

[ISFN]

I am getting "ERROR: unsupported format type 17" when attempting to encode WAV files from a particular recorder. According to http://www.onicos.com/staff/iz/formats/wav.html type 0x0017 is "Dialogic OKI ADPCM", but that does not explain what exactly is the problem with that format. So, out of curiosity, what IS it about Dialogic OKI ADPCM that makes the FLAC encoder unable to read it?

More generally, because being given a type number without any direction as to where to look it up is not terribly helpful, could we get more explanatory error messages when the encoder encounters an unsupported format?

[Erik]

The problem is that "Dialogic OKI ADPCM" is a compressed format and the FLAC WAV reading code does not know how to read that compression format.

The solution is to first convert that file to a standard PCM WAV file and then convert that. The sndfile-convert program that ships with libsndfile can decode "Dialogic OKI ADPCM".