diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 09e62c3cfc..b9caeb3737 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -185,7 +185,8 @@ static void register_all(void)
     REGISTER_DEMUXER (MM,               mm);
     REGISTER_MUXDEMUX(MMF,              mmf);
     REGISTER_MUXDEMUX(MOV,              mov);
-    REGISTER_MUXER   (MP2,              mp2);
+    REGISTER_MUXDEMUX(MP1,              mp1);
+    REGISTER_MUXDEMUX(MP2,              mp2);
     REGISTER_MUXDEMUX(MP3,              mp3);
     REGISTER_MUXER   (MP4,              mp4);
     REGISTER_DEMUXER (MPC,              mpc);
diff --git a/libavformat/mp3dec.c b/libavformat/mp3dec.c
index b45a066686..8773a55f80 100644
--- a/libavformat/mp3dec.c
+++ b/libavformat/mp3dec.c
@@ -66,7 +66,7 @@ static int check(AVIOContext *pb, int64_t pos, uint32_t *header);
 
 /* mp3 read */
 
-static int mp3_read_probe(AVProbeData *p)
+static int mpa_read_probe(AVProbeData *p, int layer)
 {
     int max_frames, first_frames = 0;
     int whole_used = 0;
@@ -89,7 +89,7 @@ static int mp3_read_probe(AVProbeData *p)
 
             header = AV_RB32(buf2);
             ret = avpriv_mpegaudio_decode_header(&h, header);
-            if (ret != 0)
+            if (ret != 0 || h.layer != layer)
                 break;
             buf2 += h.frame_size;
         }
@@ -105,7 +105,8 @@ static int mp3_read_probe(AVProbeData *p)
     if   (first_frames>=7) return AVPROBE_SCORE_EXTENSION + 1;
     else if(max_frames>200)return AVPROBE_SCORE_EXTENSION;
     else if(max_frames>=4 && max_frames >= p->buf_size/10000) return AVPROBE_SCORE_EXTENSION / 2;
-    else if(ff_id3v2_match(buf0, ID3v2_DEFAULT_MAGIC) && 2*ff_id3v2_tag_len(buf0) >= p->buf_size)
+    else if(ff_id3v2_match(buf0, ID3v2_DEFAULT_MAGIC) && 2*ff_id3v2_tag_len(buf0) >= p->buf_size &&
+            (p->buf_size < PROBE_BUF_MAX || layer == 3))
                            return p->buf_size < PROBE_BUF_MAX ? AVPROBE_SCORE_EXTENSION / 4 : AVPROBE_SCORE_EXTENSION - 2;
     else if(first_frames > 1 && whole_used) return 5;
     else if(max_frames>=1 && max_frames >= p->buf_size/10000) return 1;
@@ -113,6 +114,12 @@ static int mp3_read_probe(AVProbeData *p)
 //mpegps_mp3_unrecognized_format.mpg has max_frames=3
 }
 
+#define READ_PROBE(l) \
+static int mp##l##_read_probe(AVProbeData *p) \
+{ \
+    return mpa_read_probe(p, l); \
+}
+
 static void read_xing_toc(AVFormatContext *s, int64_t filesize, int64_t duration)
 {
     int i;
@@ -341,7 +348,7 @@ static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
     return 0;
 }
 
-static int mp3_read_header(AVFormatContext *s)
+static int mpa_read_header(AVFormatContext *s, enum AVCodecID id)
 {
     MP3DecContext *mp3 = s->priv_data;
     AVStream *st;
@@ -357,7 +364,7 @@ static int mp3_read_header(AVFormatContext *s)
         return AVERROR(ENOMEM);
 
     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
-    st->codecpar->codec_id = AV_CODEC_ID_MP3;
+    st->codecpar->codec_id = id;
     st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
     st->start_time = 0;
 
@@ -422,6 +429,12 @@ static int mp3_read_header(AVFormatContext *s)
     return 0;
 }
 
+#define READ_HEADER(l) \
+static int mp##l##_read_header(AVFormatContext *s) \
+{ \
+    return mpa_read_header(s, AV_CODEC_ID_MP##l); \
+}
+
 #define MP3_PACKET_SIZE 1024
 
 static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt)
@@ -582,23 +595,30 @@ static const AVOption options[] = {
     { NULL },
 };
 
-static const AVClass demuxer_class = {
-    .class_name = "mp3",
-    .item_name  = av_default_item_name,
-    .option     = options,
-    .version    = LIBAVUTIL_VERSION_INT,
-    .category   = AV_CLASS_CATEGORY_DEMUXER,
+#define DECLARE_LAYER(l, ext) \
+READ_PROBE(l) \
+READ_HEADER(l) \
+static const AVClass demuxer_class_##l = { \
+    .class_name = "mp" #l, \
+    .item_name  = av_default_item_name, \
+    .option     = options, \
+    .version    = LIBAVUTIL_VERSION_INT, \
+    .category   = AV_CLASS_CATEGORY_DEMUXER, \
+}; \
+\
+AVInputFormat ff_mp##l##_demuxer = { \
+    .name           = "mp" #l, \
+    .long_name      = NULL_IF_CONFIG_SMALL("MP" #l " (MPEG audio layer " #l ")"), \
+    .read_probe     = mp##l##_read_probe, \
+    .read_header    = mp##l##_read_header, \
+    .read_packet    = mp3_read_packet, \
+    .read_seek      = mp3_seek, \
+    .priv_data_size = sizeof(MP3DecContext), \
+    .flags          = AVFMT_GENERIC_INDEX, \
+    .extensions     = ext, /* XXX: use probe */ \
+    .priv_class     = &demuxer_class_##l, \
 };
 
-AVInputFormat ff_mp3_demuxer = {
-    .name           = "mp3",
-    .long_name      = NULL_IF_CONFIG_SMALL("MP2/3 (MPEG audio layer 2/3)"),
-    .read_probe     = mp3_read_probe,
-    .read_header    = mp3_read_header,
-    .read_packet    = mp3_read_packet,
-    .read_seek      = mp3_seek,
-    .priv_data_size = sizeof(MP3DecContext),
-    .flags          = AVFMT_GENERIC_INDEX,
-    .extensions     = "mp2,mp3,m2a,mpa", /* XXX: use probe */
-    .priv_class     = &demuxer_class,
-};
+DECLARE_LAYER(1, "mp1,mpa")
+DECLARE_LAYER(2, "mp2,m2a,mpa")
+DECLARE_LAYER(3, "mp3,mpa")
diff --git a/libavformat/rawenc.c b/libavformat/rawenc.c
index 0edcd1cf99..4e72aa9dfd 100644
--- a/libavformat/rawenc.c
+++ b/libavformat/rawenc.c
@@ -337,6 +337,19 @@ AVOutputFormat ff_mlp_muxer = {
 };
 #endif
 
+#if CONFIG_MP1_MUXER
+AVOutputFormat ff_mp1_muxer = {
+    .name              = "mp1",
+    .long_name         = NULL_IF_CONFIG_SMALL("MP1 (MPEG audio layer 1)"),
+    .mime_type         = "audio/mpeg",
+    .extensions        = "mp1,m1a",
+    .audio_codec       = AV_CODEC_ID_MP1,
+    .video_codec       = AV_CODEC_ID_NONE,
+    .write_packet      = ff_raw_write_packet,
+    .flags             = AVFMT_NOTIMESTAMPS,
+};
+#endif
+
 #if CONFIG_MP2_MUXER
 AVOutputFormat ff_mp2_muxer = {
     .name              = "mp2",
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 37d7024465..84acb9c795 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -609,8 +609,8 @@ int avformat_open_input(AVFormatContext **ps, const char *filename,
     }
 
     if (id3v2_extra_meta) {
-        if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
-            !strcmp(s->iformat->name, "tta")) {
+        if (!strcmp(s->iformat->name, "mp1") || !strcmp(s->iformat->name, "mp2") || !strcmp(s->iformat->name, "mp3") ||
+            !strcmp(s->iformat->name, "aac") || !strcmp(s->iformat->name, "tta")) {
             if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
                 goto fail;
         } else
diff --git a/libavformat/version.h b/libavformat/version.h
index dc689d45fb..418701e470 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -32,8 +32,8 @@
 // Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
 // Also please add any ticket numbers that you believe might be affected here
 #define LIBAVFORMAT_VERSION_MAJOR  57
-#define LIBAVFORMAT_VERSION_MINOR  66
-#define LIBAVFORMAT_VERSION_MICRO 104
+#define LIBAVFORMAT_VERSION_MINOR  67
+#define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \
