Hi, libavformat/4xm.c sets st->codec->codec_tag = 1 for 4XM audio. This seems wrong, codec_id 1 would be PCM audio. ffplay seems to be able to cope with this, but MPlayer cannot. So what codec_id could/should be used in this case? 4XMA seems to work fine, any other suggestions? Does it have to be a TwoCC? Diego