@@ -101,6 +101,17 @@ static int caf_write_header(AVFormatContext *s)

     unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, enc->codec_id);

     switch (enc->codec_id) {

+    case CODEC_ID_AAC:

+    case CODEC_ID_AC3:

+    case CODEC_ID_ALAC:

+    case CODEC_ID_AMR_NB:

+    case CODEC_ID_QCELP:

+    case CODEC_ID_QDM2:

+        av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n");

+        return AVERROR_PATCHWELCOME;

+    }

+

+    switch (enc->codec_id) {

     case CODEC_ID_PCM_S8:

     case CODEC_ID_PCM_S16LE:

     case CODEC_ID_PCM_S16BE: