diff --git a/Changelog b/Changelog
index f336852525..5bcdae7a83 100644
--- a/Changelog
+++ b/Changelog
@@ -9,6 +9,7 @@ version <next>:
 - MMS-TCP support
 - VP8 decoding via libvpx
 - CODEC_CAP_EXPERIMENTAL added
+- Demuxer for On2's IVF format
 
 
 
diff --git a/doc/general.texi b/doc/general.texi
index 07fd2017d4..94c66f44e5 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -109,6 +109,8 @@ library:
     @tab Format used in various Interplay computer games.
 @item IV8                       @tab   @tab X
     @tab A format generated by IndigoVision 8000 video server.
+@item IVF (On2)                 @tab   @tab X
+    @tab A format used by libvpx
 @item LMLM4                     @tab   @tab X
     @tab Used by Linux Media Labs MPEG-4 PCI boards
 @item Matroska                  @tab X @tab X
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 4c4b83bc2e..ac812cca6c 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -99,6 +99,7 @@ OBJS-$(CONFIG_INGENIENT_DEMUXER)         += raw.o
 OBJS-$(CONFIG_IPMOVIE_DEMUXER)           += ipmovie.o
 OBJS-$(CONFIG_ISS_DEMUXER)               += iss.o
 OBJS-$(CONFIG_IV8_DEMUXER)               += iv8.o
+OBJS-$(CONFIG_IVF_DEMUXER)               += ivfdec.o riff.o
 OBJS-$(CONFIG_LMLM4_DEMUXER)             += lmlm4.o
 OBJS-$(CONFIG_M4V_DEMUXER)               += raw.o
 OBJS-$(CONFIG_M4V_MUXER)                 += raw.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 4d5a8a6c22..b2f1194f69 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -105,6 +105,7 @@ void av_register_all(void)
     REGISTER_MUXER    (IPOD, ipod);
     REGISTER_DEMUXER  (ISS, iss);
     REGISTER_DEMUXER  (IV8, iv8);
+    REGISTER_DEMUXER  (IVF, ivf);
     REGISTER_DEMUXER  (LMLM4, lmlm4);
     REGISTER_MUXDEMUX (M4V, m4v);
     REGISTER_MUXER    (MD5, md5);
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 0b122d1a02..80dc5c38c9 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -22,7 +22,7 @@
 #define AVFORMAT_AVFORMAT_H
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 66
+#define LIBAVFORMAT_VERSION_MINOR 67
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
diff --git a/libavformat/ivfdec.c b/libavformat/ivfdec.c
new file mode 100644
index 0000000000..9baa3ec20e
--- /dev/null
+++ b/libavformat/ivfdec.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2010 David Conrad
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avformat.h"
+#include "riff.h"
+#include "libavutil/intreadwrite.h"
+
+static int probe(AVProbeData *p)
+{
+    if (AV_RL32(p->buf) == MKTAG('D','K','I','F')
+        && !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32)
+        return AVPROBE_SCORE_MAX-2;
+
+    return 0;
+}
+
+static int read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    AVStream *st;
+    AVRational time_base;
+
+    get_le32(s->pb); // DKIF
+    get_le16(s->pb); // version
+    get_le16(s->pb); // header size
+
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_tag  = get_le32(s->pb);
+    st->codec->codec_id   = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag);
+    st->codec->width      = get_le16(s->pb);
+    st->codec->height     = get_le16(s->pb);
+    time_base.den         = get_le32(s->pb);
+    time_base.num         = get_le32(s->pb);
+    st->duration          = get_le64(s->pb);
+
+    st->need_parsing      = AVSTREAM_PARSE_HEADERS;
+
+    if (!time_base.den || !time_base.num) {
+        av_log(s, AV_LOG_ERROR, "Invalid frame rate\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    av_set_pts_info(st, 64, time_base.num, time_base.den);
+
+    return 0;
+}
+
+static int read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int ret, size = get_le32(s->pb);
+    int64_t   pts = get_le64(s->pb);
+
+    ret = av_get_packet(s->pb, pkt, size);
+    pkt->stream_index = 0;
+    pkt->pts          = pts;
+    pkt->pos         -= 12;
+
+    return ret;
+}
+
+AVInputFormat ivf_demuxer = {
+    "ivf",
+    NULL_IF_CONFIG_SMALL("On2 IVF"),
+    0,
+    probe,
+    read_header,
+    read_packet,
+    .flags= AVFMT_GENERIC_INDEX,
+    .codec_tag = (const AVCodecTag*[]){ff_codec_bmp_tags, 0},
+};