diff --git a/Changelog b/Changelog
index 0975fee..8377956 100644
--- a/Changelog
+++ b/Changelog
@@ -21,6 +21,7 @@ version <next>:
 - Brooktree ProSumer video decoder
 - MatchWare Screen Capture Codec decoder
 - WinCam Motion Video decoder
+- AVS2 video encoder via libxavs2
 
 
 version 4.0:
diff --git a/configure b/configure
index 8bbcd53..c439d2a 100755
--- a/configure
+++ b/configure
@@ -280,6 +280,7 @@ External library support:
   --enable-libx264         enable H.264 encoding via x264 [no]
   --enable-libx265         enable HEVC encoding via x265 [no]
   --enable-libxavs         enable AVS encoding via xavs [no]
+  --enable-libxavs2        enable AVS2 encoding via xavs2 [no]
   --enable-libxcb          enable X11 grabbing using XCB [autodetect]
   --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
@@ -1667,6 +1668,7 @@ EXTERNAL_LIBRARY_GPL_LIST="
     libx264
     libx265
     libxavs
+    libxavs2
     libxvid
 "
 
@@ -3132,6 +3134,7 @@ libx264rgb_encoder_deps="libx264 x264_csp_bgr"
 libx264rgb_encoder_select="libx264_encoder"
 libx265_encoder_deps="libx265"
 libxavs_encoder_deps="libxavs"
+libxavs2_encoder_deps="libxavs2"
 libxvid_encoder_deps="libxvid"
 libzvbi_teletext_decoder_deps="libzvbi"
 vapoursynth_demuxer_deps="vapoursynth"
@@ -6164,6 +6167,7 @@ enabled libx264           && { check_pkg_config libx264 x264 "stdint.h x264.h" x
 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
                              require_cpp_condition x265.h "X265_BUILD >= 68"
 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode "-lxavs $pthreads_extralibs $libm_extralibs"
+enabled libxavs2          && require_pkg_config libxavs2 "xavs2 >= 1.2.77" "stdint.h xavs2.h" xavs2_api_get
 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
 enabled libzimg           && require_pkg_config libzimg "zimg >= 2.7.0" zimg.h zimg_get_api_version
 enabled libzmq            && require_pkg_config libzmq libzmq zmq.h zmq_ctx_new
diff --git a/doc/encoders.texi b/doc/encoders.texi
index 7b09575..0b4dfb3 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -2726,6 +2726,46 @@ Reduces detail but attempts to preserve color at extremely low bitrates.
 
 @end table
 
+@section libxavs2
+
+xavs2 AVS2-P2/IEEE1857.4 encoder wrapper.
+
+This encoder requires the presence of the libxavs2 headers and library
+during configuration. You need to explicitly configure the build with
+@option{--enable-libxavs2}.
+
+@subsection Options
+
+@table @option
+@item i_lcurow_threads
+Set the number of parallel threads for rows from 1 to 8 (default 5).
+
+@item i_initial_qp
+Set the xavs2 quantization parameter from 1 to 63 (default 34).
+
+@item preset_level
+Set the Speed level from 0 to 9 (default 0).
+
+@item intra_period
+Set the Intra period from 3 to 100 (default 4).
+
+@item hierarchical_ref
+Set the hierarchical reference from 0 to 1 (default 1).
+
+@item num_bframes
+Set the number of B frames from 0 to 15 (default 7).
+
+@item xavs2-params
+Set xavs2 options using a list of @var{key}=@var{value} couples separated
+by ":".
+
+For example to specify libxavs2 encoding options with @option{-xavs2-params}:
+
+@example
+ffmpeg -i input -c:v libxavs2 -xavs2-params preset_level=5 output.avs2
+@end example
+@end table
+
 @c man end VIDEO ENCODERS
 
 @chapter Subtitles Encoders
diff --git a/doc/general.texi b/doc/general.texi
index 06f7a78..05f7bcd9 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -17,6 +17,20 @@ for more formats. None of them are used by default, their use has to be
 explicitly requested by passing the appropriate flags to
 @command{./configure}.
 
+@section libxavs2
+
+FFmpeg can make use of the xavs2 library for AVS2-P2/IEEE1857.4 video encoding.
+
+Go to @url{https://github.com/pkuvcl/xavs2} and follow the instructions for
+installing the library. Then pass @code{--enable-libxavs2} to configure to
+enable it.
+
+@float NOTE
+libxavs2 is under the GNU Public License Version 2 or later
+(see @url{http://www.gnu.org/licenses/old-licenses/gpl-2.0.html} for
+details), you must upgrade FFmpeg's license to GPL in order to use it.
+@end float
+
 @section libdavs2
 
 FFmpeg can make use of the davs2 library for AVS2-P2/IEEE1857.4 video decoding.
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index f8673f0..bf17bf7 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -992,6 +992,7 @@ OBJS-$(CONFIG_LIBX262_ENCODER)            += libx264.o
 OBJS-$(CONFIG_LIBX264_ENCODER)            += libx264.o
 OBJS-$(CONFIG_LIBX265_ENCODER)            += libx265.o
 OBJS-$(CONFIG_LIBXAVS_ENCODER)            += libxavs.o
+OBJS-$(CONFIG_LIBXAVS2_ENCODER)           += libxavs2.o
 OBJS-$(CONFIG_LIBXVID_ENCODER)            += libxvid.o
 OBJS-$(CONFIG_LIBZVBI_TELETEXT_DECODER)   += libzvbi-teletextdec.o ass.o
 
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index a461131..493ff8f 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -711,6 +711,7 @@ extern AVCodec ff_libx264_encoder;
 extern AVCodec ff_libx264rgb_encoder;
 extern AVCodec ff_libx265_encoder;
 extern AVCodec ff_libxavs_encoder;
+extern AVCodec ff_libxavs2_encoder;
 extern AVCodec ff_libxvid_encoder;
 extern AVCodec ff_libzvbi_teletext_decoder;
 
diff --git a/libavcodec/libxavs2.c b/libavcodec/libxavs2.c
new file mode 100644
index 0000000..877da4e
--- /dev/null
+++ b/libavcodec/libxavs2.c
@@ -0,0 +1,320 @@
+/*
+ * AVS2 encoding using the xavs2 library
+ *
+ * Copyright (C) 2018 Yiqun Xu,   <yiqun.xu@vipl.ict.ac.cn>
+ *                    Falei Luo,  <falei.luo@gmail.com>
+ *                    Huiwen Ren, <hwrenx@gmail.com>
+ *
+ * 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 <ctype.h>
+
+#include "xavs2.h"
+#include "avcodec.h"
+#include "mpeg12.h"
+#include "internal.h"
+#include "libavutil/internal.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/common.h"
+#include "libavutil/avutil.h"
+
+#define DELAY_FRAMES 8
+
+typedef struct XAVS2EContext {
+    AVClass *class;
+
+    void* handle;
+
+    int i_lcurow_threads;
+    int i_initial_qp;
+    int preset_level;
+    int intra_period;
+
+    void *encoder;
+    char *xavs2_opts;
+
+    int b_hierarchical_reference;
+    int num_b_frames;
+
+    xavs2_outpacket_t packet;
+    xavs2_param_t *param;
+
+    const xavs2_api_t *api;
+
+} XAVS2EContext;
+
+static av_cold int xavs2_init(AVCodecContext *avctx)
+{
+    XAVS2EContext *cae= avctx->priv_data;
+    int bit_depth;
+
+    char str_bd[16] = {0}, str_iqp[16] = {0}, str_w[16] = {0}, str_h[16] = {0};
+    char str_preset[16] = {0}, str_hr[16] = {0}, str_bf[16] = {0};
+    char str_iv[16] = {0}, str_TBR[16] = {0}, str_fr[16] = {0};
+
+    bit_depth = avctx->pix_fmt == AV_PIX_FMT_YUV420P ? 8 : 10;
+
+    /* get API handler */
+    cae->api = xavs2_api_get(bit_depth);
+
+    cae->param = cae->api->opt_alloc();
+
+    if (!cae->param) {
+        av_log(avctx, AV_LOG_ERROR, "param alloc failed\n");
+        return AVERROR(EINVAL);
+    }
+
+    cae->api->opt_set2(cae->param,"rec","0");
+    cae->api->opt_set2(cae->param,"log","0");
+
+    av_strlcatf(str_w, sizeof(str_w), "%d", avctx->width);
+    av_strlcatf(str_h, sizeof(str_h), "%d", avctx->height);
+    av_strlcatf(str_bd, sizeof(str_bd), "%d", bit_depth);
+    av_strlcatf(str_iqp, sizeof(str_iqp), "%d", cae->i_initial_qp);
+
+    cae->api->opt_set2(cae->param,"width",str_w);
+    cae->api->opt_set2(cae->param,"height",str_h);
+    cae->api->opt_set2(cae->param, "initial_qp", str_iqp);
+    cae->api->opt_set2(cae->param, "bitdepth", str_bd);
+
+    /* preset level */
+    av_strlcatf(str_preset, sizeof(str_preset), "%d", cae->preset_level);
+
+    cae->api->opt_set2(cae->param,"preset", str_preset);
+    /* bframes */
+    av_log( avctx, AV_LOG_DEBUG,
+            "HierarchicalReference %d, Number B Frames %d\n",
+            cae->b_hierarchical_reference, cae->num_b_frames);
+
+    av_strlcatf(str_hr, sizeof(str_hr), "%d", cae->b_hierarchical_reference);
+    //av_strlcatf(str_bf, sizeof(str_bf), "%d", cae->num_b_frames);
+    av_strlcatf(str_bf, sizeof(str_bf), "%d", avctx->max_b_frames);
+
+    cae->api->opt_set2(cae->param, "hierarchical_ref",  str_hr);
+    cae->api->opt_set2(cae->param, "bframes",  str_bf);
+
+    if (cae->xavs2_opts) {
+        AVDictionary *dict    = NULL;
+        AVDictionaryEntry *en = NULL;
+
+        if (!av_dict_parse_string(&dict, cae->xavs2_opts, "=", ":", 0)) {
+            while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
+
+                int i_value = isdigit(en->value[0]) ? atoi(en->value) : 0;
+                av_strlcatf(str_iv, sizeof(str_iv), "%d", i_value);
+
+                int parse_ret = cae->api->opt_set2(cae->param, en->key, str_iv);
+                if (parse_ret < 0) {
+                    av_log(avctx, AV_LOG_WARNING,
+                          "Invalid value for %s: %s\n", en->key, en->value);
+                }
+
+            }
+            av_dict_free(&dict);
+        }
+    }
+
+    /* Rate control */
+    int code;
+
+    if (avctx->bit_rate > 0) {
+        cae->api->opt_set2(cae->param, "RateControl",  "1");
+        av_strlcatf(str_TBR, sizeof(str_TBR), "%d", avctx->bit_rate);
+        cae->api->opt_set2(cae->param, "TargetBitRate", str_TBR);
+    }
+    cae->api->opt_set2(cae->param, "intraperiod", "50");
+
+    ff_mpeg12_find_best_frame_rate(avctx->framerate, &code, NULL, NULL, 0);
+    av_strlcatf(str_fr, sizeof(str_fr), "%d", code);
+
+    cae->api->opt_set2(cae->param, "FrameRate", str_fr);
+    cae->encoder = cae->api->encoder_create(cae->param);
+
+    if (!cae->encoder) {
+        av_log(avctx,AV_LOG_ERROR, "Can not create encoder. Null pointer returned\n");
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
+static void xavs2_dump_frame_force(xavs2_picture_t *pic, AVFrame *frame, const int shift_in)
+{
+    int j, k;
+    for (k = 0; k < 3; k++) {
+        int i_stride = pic->img.i_stride[k];
+        for (j = 0; j < pic->img.i_lines[k]; j++) {
+            uint16_t *p_plane = (uint16_t *)pic->img.img_planes[k][j * i_stride];
+            int i;
+            uint8_t *p_buffer = frame->data[k] + frame->linesize[k] * j;
+            memset(p_plane, 0, i_stride);
+            for (i = 0; i < pic->img.i_width[k]; i++) {
+                p_plane[i] = p_buffer[i] << shift_in;
+            }
+        }
+    }
+}
+
+static void xavs2_dump_frame(xavs2_picture_t *pic, AVFrame *frame)
+{
+    int j, k;
+    for (k = 0; k < 3; k++) {
+        for (j = 0; j < pic->img.i_lines[k]; j++) {
+            memcpy( pic->img.img_planes[k] + pic->img.i_stride[k] * j,
+                    frame->data[k]+frame->linesize[k] * j,
+                    pic->img.i_width[k] * pic->img.in_sample_size);
+        }
+    }
+}
+
+static int xavs2_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                      const AVFrame *frame, int *got_packet)
+{
+    XAVS2EContext *cae = avctx->priv_data;
+    xavs2_picture_t pic;
+
+    /* create the XAVS2 video encoder */
+    /* read frame data and send to the XAVS2 video encoder */
+    if (cae->api->encoder_get_buffer(cae->encoder, &pic) < 0) {
+        av_log(avctx,AV_LOG_ERROR, "failed to get frame buffer\n");
+        return AVERROR(EINVAL);
+    }
+    if (frame) {
+        switch (frame->format) {
+            case AV_PIX_FMT_YUV420P:
+                if (pic.img.in_sample_size == pic.img.enc_sample_size) {
+                    xavs2_dump_frame(&pic, frame);
+                } else {
+                    const int shift_in = atoi(cae->api->opt_get(cae->param, "SampleShift"));
+                    xavs2_dump_frame_force(&pic, frame, shift_in);
+                }
+            break;
+            case AV_PIX_FMT_YUV420P10:
+                if (pic.img.in_sample_size == pic.img.enc_sample_size) {
+                    xavs2_dump_frame(&pic, frame);
+                } else {
+                    av_log(avctx, AV_LOG_ERROR,
+                          "Unsupportted input pixel format: 10-bit is not supported\n");
+                    return AVERROR(EINVAL);
+                }
+            break;
+            default:
+                av_log(avctx, AV_LOG_ERROR, "Unsupportted pixel format\n");
+                return AVERROR(EINVAL);
+            break;
+        }
+
+        pic.i_state = 0;
+        pic.i_pts  = frame->pts;
+        pic.i_type = XAVS2_TYPE_AUTO;
+
+        int ret;
+        ret = cae->api->encoder_encode(cae->encoder, &pic, &cae->packet);
+
+        if (ret) {
+            av_log(avctx, AV_LOG_ERROR, "encode failed\n");
+            return AVERROR(EINVAL);
+        }
+
+    } else {
+        cae->api->encoder_encode(cae->encoder, NULL, &cae->packet);
+    }
+
+    if ((cae->packet.len) && (cae->packet.state != XAVS2_STATE_FLUSH_END)){
+        av_new_packet(pkt, cae->packet.len);
+
+        if (!pkt) {
+            av_log(avctx, AV_LOG_ERROR, "packet alloc failed\n");
+            return AVERROR(EINVAL);
+        }
+
+        pkt->pts = cae->packet.pts;
+        pkt->dts = cae->packet.dts;
+
+        memcpy(pkt->data, cae->packet.stream, cae->packet.len);
+        pkt->size = cae->packet.len;
+
+        cae->api->encoder_packet_unref(cae->encoder, &cae->packet);
+
+        *got_packet = 1;
+    } else {
+        *got_packet = 0;
+    }
+
+    return 0;
+}
+
+static av_cold int xavs2_close(AVCodecContext *avctx)
+{
+    XAVS2EContext *cae = avctx->priv_data;
+    /* destroy the encoder */
+    if (cae->api) {
+        cae->api->encoder_destroy(cae->encoder);
+
+        if (cae->param) {
+            cae->api->opt_destroy(cae->param);
+        }
+    }
+    return 0;
+}
+
+#define OFFSET(x) offsetof(XAVS2EContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+
+static const AVOption options[] = {
+   { "i_lcurow_threads",           "number of parallel threads for rows"     ,       OFFSET(i_lcurow_threads),  AV_OPT_TYPE_INT,    {.i64 =  5 }, 1,   8,  VE },
+    { "i_initial_qp"    ,           "Quantization parameter",       OFFSET(i_initial_qp)    ,  AV_OPT_TYPE_INT,    {.i64 = 34 }, 1,  63,  VE },
+    { "preset_level"    ,           "Speed level"           ,       OFFSET(preset_level)    ,  AV_OPT_TYPE_INT,    {.i64 =  0 }, 0,   9,  VE },
+    { "intra_period"    ,           "Intra period"          ,       OFFSET(intra_period)    ,  AV_OPT_TYPE_INT,    {.i64 =  4 }, 3, 100,  VE },
+    { "hierarchical_ref",           "hierarchical reference",       OFFSET(b_hierarchical_reference)    ,  AV_OPT_TYPE_INT,    {.i64 =  1 }, 0, 1,  VE },
+    { "num_bframes"     ,           "number of B frames"    ,       OFFSET(num_b_frames)    ,  AV_OPT_TYPE_INT,    {.i64 =  7 }, 0,  15,  VE },
+    { "xavs2-params",    "set the xavs2 configuration using a :-separated list of key=value parameters", OFFSET(xavs2_opts), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
+    { NULL },
+};
+
+static const AVClass xavs2_class = {
+    .class_name = "XAVS2EContext",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVCodecDefault xavs2_defaults[] = {
+    { "b",                "0" },
+    { NULL },
+};
+
+AVCodec ff_libxavs2_encoder = {
+    .name           = "libxavs2",
+    .long_name      = NULL_IF_CONFIG_SMALL("libxavs2 AVS2-P2/IEEE1857.4"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_AVS2,
+    .priv_data_size = sizeof(XAVS2EContext),
+    .init           = xavs2_init,
+    .encode2        = xavs2_encode_frame,
+    .close          = xavs2_close,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_NONE },
+    .priv_class     = &xavs2_class,
+    .defaults       = xavs2_defaults,
+    .wrapper_name   = "libxavs2",
+} ;
diff --git a/libavcodec/version.h b/libavcodec/version.h
index b38284a..c092491 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  27
+#define LIBAVCODEC_VERSION_MINOR  28
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
