diff --git a/headers/os/media/MediaDefs.h b/headers/os/media/MediaDefs.h
index 3554af3141..e12286b47b 100644
--- a/headers/os/media/MediaDefs.h
+++ b/headers/os/media/MediaDefs.h
@@ -599,8 +599,8 @@ typedef enum {
 	B_WAV_FORMAT_FAMILY = 6,
 	B_AIFF_FORMAT_FAMILY = 7,
 	B_AVR_FORMAT_FAMILY = 8,
-	
-	B_MISC_FORMAT_FAMILY = 99999
+	B_MISC_FORMAT_FAMILY = 99999,
+	B_META_FORMAT_FAMILY = 100000
 } media_format_family;
 
 struct media_file_format {
diff --git a/headers/os/media/MediaFormats.h b/headers/os/media/MediaFormats.h
index bbc52f6ae5..a91dbc2c3e 100644
--- a/headers/os/media/MediaFormats.h
+++ b/headers/os/media/MediaFormats.h
@@ -118,6 +118,10 @@ typedef struct {
 	uint32 codec;
 } media_misc_description;
 
+typedef struct {
+	char description[48];
+} media_meta_description;
+
 typedef struct _media_format_description {
 #if defined(__cplusplus)
 	_media_format_description();
@@ -137,6 +141,7 @@ typedef struct _media_format_description {
 		media_aiff_description aiff;
 		media_misc_description misc;
 		media_avr_description avr;
+		media_meta_description meta;
 		uint32 _reserved_[12];
 	} u;
 } media_format_description;
diff --git a/headers/private/media/DecoderPlugin.h b/headers/private/media/DecoderPlugin.h
index 6e48e747c0..296d12723f 100644
--- a/headers/private/media/DecoderPlugin.h
+++ b/headers/private/media/DecoderPlugin.h
@@ -44,8 +44,7 @@ public:
 
 	virtual Decoder *NewDecoder() = 0;
 	
-	status_t PublishDecoder(const char *short_name, const char *pretty_name, const media_format_description &fmt_desc, media_type fmt_type);
-	status_t PublishDecoder(const char *short_name, const char *pretty_name, const media_format &fmt);
+	status_t PublishDecoder(const char *meta_description, const char *short_name, const char *pretty_name, const char *default_mapping = 0);
 };
 
 } } // namespace BPrivate::media
diff --git a/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp b/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
index c7a2015993..56c31b0916 100644
--- a/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
+++ b/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
@@ -105,27 +105,15 @@ mp3DecoderPlugin::NewDecoder()
 status_t
 mp3DecoderPlugin::RegisterPlugin()
 {
-	struct {
-		const char *short_name;
-		const char *pretty_name;
-		uint32 id;
-	} descs[] = {
-		{ "mpeg1 audio layer1", "MPEG 1 audio layer 1 decoder, based on mpeg123 mpglib", B_MPEG_1_AUDIO_LAYER_1 },
-		{ "mpeg1 audio layer2", "MPEG 1 audio layer 2 decoder, based on mpeg123 mpglib", B_MPEG_1_AUDIO_LAYER_2 },
-		{ "mpeg1 audio layer3", "MPEG 1 audio layer 3 decoder, based on mpeg123 mpglib", B_MPEG_1_AUDIO_LAYER_3 },
-		{ "mpeg2 audio layer1", "MPEG 2 audio layer 1 decoder, based on mpeg123 mpglib", B_MPEG_2_AUDIO_LAYER_1 },
-		{ "mpeg2 audio layer2", "MPEG 2 audio layer 2 decoder, based on mpeg123 mpglib", B_MPEG_2_AUDIO_LAYER_2 },
-		{ "mpeg2 audio layer3", "MPEG 2 audio layer 3 decoder, based on mpeg123 mpglib", B_MPEG_2_AUDIO_LAYER_3 },
-		{ "mpeg2.5 audio layer1", "MPEG 2.5 audio layer 1 decoder, based on mpeg123 mpglib", B_MPEG_2_5_AUDIO_LAYER_1 },
-		{ "mpeg2.5 audio layer2", "MPEG 2.5 audio layer 2 decoder, based on mpeg123 mpglib", B_MPEG_2_5_AUDIO_LAYER_2 },
-		{ "mpeg2.5 audio layer3", "MPEG 2.5 audio layer 3 decoder, based on mpeg123 mpglib", B_MPEG_2_5_AUDIO_LAYER_3 }
-	};
-	for (int i = 0; i < (int)(sizeof(descs) / sizeof(descs[i])); i++) {
-		media_format_description fmt_desc;
-		fmt_desc.family = B_MPEG_FORMAT_FAMILY;
-		fmt_desc.u.mpeg.id = descs[i].id;
-		PublishDecoder(descs[i].short_name, descs[i].pretty_name, fmt_desc, B_MEDIA_ENCODED_AUDIO);
-	}
+	PublishDecoder("audiocodec/mpeg1layer1", "mp3", "MPEG 1 audio layer 1 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg1layer2", "mp3", "MPEG 1 audio layer 2 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg1layer3", "mp3", "MPEG 1 audio layer 3 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg2layer1", "mp3", "MPEG 2 audio layer 1 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg2layer2", "mp3", "MPEG 2 audio layer 2 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg2layer3", "mp3", "MPEG 2 audio layer 3 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg2.5layer1", "mp3", "MPEG 2.5 audio layer 1 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg2.5layer2", "mp3", "MPEG 2.5 audio layer 2 decoder, based on mpeg123 mpglib");
+	PublishDecoder("audiocodec/mpeg2.5layer3", "mp3", "MPEG 2.5 audio layer 3 decoder, based on mpeg123 mpglib");
 }
 
 
diff --git a/src/add-ons/media/plugins/raw_decoder/RawDecoderPlugin.cpp b/src/add-ons/media/plugins/raw_decoder/RawDecoderPlugin.cpp
index b2ee1122c9..5be2cd08e7 100644
--- a/src/add-ons/media/plugins/raw_decoder/RawDecoderPlugin.cpp
+++ b/src/add-ons/media/plugins/raw_decoder/RawDecoderPlugin.cpp
@@ -63,12 +63,8 @@ RawDecoderPlugin::NewDecoder()
 status_t
 RawDecoderPlugin::RegisterPlugin()
 {
-	media_format fmt;
-	memset(&fmt, 0, sizeof(fmt));
-	fmt.type = B_MEDIA_RAW_AUDIO;
-	PublishDecoder("raw audio", "RAW audio decoder", fmt);
-	fmt.type = B_MEDIA_RAW_VIDEO;
-	PublishDecoder("raw video", "RAW video decoder", fmt);
+	PublishDecoder("audiocodec/raw", "raw", "RAW audio decoder", "{ WAV : 0x1 }, { QT : 0x20776172, 0x736f7774, 0x74776f73 }");
+	PublishDecoder("videocodec/raw", "raw", "RAW video decoder");
 	return B_OK;
 }
 
diff --git a/src/kits/media/DecoderPlugin.cpp b/src/kits/media/DecoderPlugin.cpp
index ce8bd92331..eaf707f607 100644
--- a/src/kits/media/DecoderPlugin.cpp
+++ b/src/kits/media/DecoderPlugin.cpp
@@ -30,25 +30,23 @@ DecoderPlugin::DecoderPlugin()
 }
 
 status_t
-DecoderPlugin::PublishDecoder(const char *short_name, const char *pretty_name, const media_format_description &fmt_desc, media_type fmt_type)
+DecoderPlugin::PublishDecoder(const char *meta_description,
+							  const char *short_name,
+							  const char *pretty_name,
+							  const char *default_mapping /* = 0 */)
 {
+/*
 	media_format fmt;
 	memset(&fmt, 0, sizeof(fmt));
 	fmt.type = fmt_type;
 	BMediaFormats formats;
 	if (B_OK != formats.MakeFormatFor(&fmt_desc, 1, &fmt))
 		return B_ERROR;
-	return PublishDecoder(short_name, pretty_name, fmt);
-}
 
-status_t
-DecoderPlugin::PublishDecoder(const char *short_name, const char *pretty_name, const media_format &fmt)
-{
 	char s[1024];
 	string_for_format(fmt, s, sizeof(s));
 	printf("DecoderPlugin::PublishDecoder: short_name \"%s\", pretty_name \"%s\", format %s\n",
 		short_name, pretty_name, s);
-		
-
+*/
 	return B_OK;
 }
diff --git a/src/kits/media/MediaExtractor.cpp b/src/kits/media/MediaExtractor.cpp
index 1a843e274e..a370f82b7d 100644
--- a/src/kits/media/MediaExtractor.cpp
+++ b/src/kits/media/MediaExtractor.cpp
@@ -148,7 +148,9 @@ MediaExtractor::GetNextChunk(int32 stream,
 							 media_header *mediaHeader)
 {
 	// get buffered chunk
-	return B_OK;
+	
+	// XXX this should be done in a different thread, and double buffered for each stream
+	return fReader->GetNextChunk(fStreamInfo[stream].cookie, chunkBuffer, chunkSize, mediaHeader);
 }
 
 status_t
diff --git a/src/kits/media/MediaFormats.cpp b/src/kits/media/MediaFormats.cpp
index 6b51f93155..2634e20b0f 100644
--- a/src/kits/media/MediaFormats.cpp
+++ b/src/kits/media/MediaFormats.cpp
@@ -6,7 +6,6 @@
 #include <MediaFormats.h>
 #include "debug.h"
 
-
 /*************************************************************
  * 
  *************************************************************/