Index: acoustid-fingerprinter-0.6/decoder.h
===================================================================
--- acoustid-fingerprinter-0.6/decoder.h
+++ acoustid-fingerprinter-0.6/decoder.h	2017-03-09 16:55:45.256801977 +0100
@@ -184,6 +184,9 @@
 		return false;
 	}
 
+	/* request regular signed 16-bit packed format */
+	m_codec_ctx->request_sample_fmt = AV_SAMPLE_FMT_S16;
+
 	if (avcodec_open2(m_codec_ctx, codec, NULL) < 0) {
         m_error = "Couldn't open the codec.";
         return false;