diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 9c15ed62d2..5416e0f34f 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -123,6 +123,7 @@ OBJS-$(CONFIG_ANULLSINK_FILTER)              += asink_anullsink.o
 # video filters
 OBJS-$(CONFIG_ALPHAEXTRACT_FILTER)           += vf_extractplanes.o
 OBJS-$(CONFIG_ALPHAMERGE_FILTER)             += vf_alphamerge.o
+OBJS-$(CONFIG_ANSNR_FILTER)                  += vf_ansnr.o dualinput.o framesync.o
 OBJS-$(CONFIG_ASS_FILTER)                    += vf_subtitles.o
 OBJS-$(CONFIG_ATADENOISE_FILTER)             += vf_atadenoise.o
 OBJS-$(CONFIG_AVGBLUR_FILTER)                += vf_avgblur.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 64b634e8f3..fbd9ec026e 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -134,6 +134,7 @@ static void register_all(void)
 
     REGISTER_FILTER(ALPHAEXTRACT,   alphaextract,   vf);
     REGISTER_FILTER(ALPHAMERGE,     alphamerge,     vf);
+    REGISTER_FILTER(ANSNR,          ansnr,          vf);
     REGISTER_FILTER(ASS,            ass,            vf);
     REGISTER_FILTER(ATADENOISE,     atadenoise,     vf);
     REGISTER_FILTER(AVGBLUR,        avgblur,        vf);
diff --git a/libavfilter/vf_ansnr.c b/libavfilter/vf_ansnr.c
new file mode 100644
index 0000000000..3c53b726d2
--- /dev/null
+++ b/libavfilter/vf_ansnr.c
@@ -0,0 +1,727 @@
+/*
+ * Copyright 2016-2017 Netflix, Inc.
+ * Copyright (c) 2017 Betty Wu
+ *
+ * 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
+ */
+
+/*
+ * @file
+ * Caculate the ANSNR between two input videos.
+ * @author Betty Wu
+ */
+
+#include "libavutil/avstring.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "dualinput.h"
+#include "drawutils.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+#define MAX_ALIGN 32
+#define ALIGN_CEIL(x) ((x) + ((x) % MAX_ALIGN ? MAX_ALIGN - (x) % MAX_ALIGN : 0))
+#define OPT_RANGE_PIXEL_OFFSET -128
+
+#ifndef ANSNR_OPTIONS_H_
+#define ANSNR_OPTIONS_H_
+
+/* Whether to use border replication instead of zero extension. */
+/* #define ANSNR_OPT_BORDER_REPLICATE */
+
+/* Whether to save intermediate results to files. */
+/* #define ANSNR_OPT_DEBUG_DUMP */
+
+/* Whether to use a 1-D approximation of filters. */
+/* #define ANSNR_OPT_FILTER_1D */
+
+/* Whether to normalize result by dividing against maximum ANSNR. */
+/* #define ANSNR_OPT_NORMALIZE */
+
+/* Whether to use single precision for computation. */
+#define ANSNR_OPT_SINGLE_PRECISION
+//#define ANSNR_OPT_DOUBLE_PRECISION
+
+#endif /* ANSNR_OPTIONS_H_ */
+
+#ifndef ANSNR_TOOLS_H_
+#define ANSNR_TOOLS_H_
+#endif
+
+#ifdef ANSNR_OPT_SINGLE_PRECISION
+  typedef float number_t;
+  #define read_image_b       read_image_b2s
+  #define read_image_w       read_image_w2s
+  #define ansnr_filter1d_ref ansnr_filter1d_ref_s
+  #define ansnr_filter1d_dis ansnr_filter1d_dis_s
+  #define ansnr_filter2d_ref ansnr_filter2d_ref_s
+  #define ansnr_filter2d_dis ansnr_filter2d_dis_s
+  #define ansnr_filter1d     ansnr_filter1d_s
+  #define ansnr_filter2d     ansnr_filter2d_s
+  #define ansnr_mse          ansnr_mse_s
+#else
+  typedef double number_t;
+  #define read_image_b       read_image_b2d
+  #define read_image_w       read_image_w2d
+  #define ansnr_filter1d_ref ansnr_filter1d_ref_d
+  #define ansnr_filter1d_dis ansnr_filter1d_dis_d
+  #define ansnr_filter2d_ref ansnr_filter2d_ref_d
+  #define ansnr_filter2d_dis ansnr_filter2d_dis_d
+  #define ansnr_filter1d     ansnr_filter1d_d
+  #define ansnr_filter2d     ansnr_filter2d_d
+  #define ansnr_mse          ansnr_mse_d
+#endif
+
+typedef struct ANSNRContext {
+    const AVClass *class;
+    FFDualInputContext dinput;
+    uint64_t nb_frames;
+    FILE *stats_file;
+    char *stats_file_str;
+    int stats_version;
+    int stats_header_written;
+    int stats_add_max;
+    int is_rgb;
+    uint8_t rgba_map[4];
+    double score;
+    double score_total;
+    char comps[4];
+    int nb_components;
+    int planewidth[4];
+    int planeheight[4];
+
+} ANSNRContext;
+#define OFFSET(x) offsetof(ANSNRContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption ansnr_options[] = {
+    {"stats_file", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
+    {"f",          "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
+    { NULL }
+};
+AVFILTER_DEFINE_CLASS(ansnr);
+
+
+const int ansnr_filter1d_ref_width = 3;
+const int ansnr_filter1d_dis_width = 5;
+const int ansnr_filter2d_ref_width = 3;
+const int ansnr_filter2d_dis_width = 5;
+
+
+#ifdef ANSNR_OPT_SINGLE_PRECISION
+const float ansnr_filter1d_ref_s[3] = { 0x1.00243ap-2, 0x1.ffb78cp-2, 0x1.00243ap-2 };
+const float ansnr_filter1d_dis_s[5] = { 0x1.be5f0ep-5, 0x1.f41fd6p-3, 0x1.9c4868p-2, 0x1.f41fd6p-3, 0x1.be5f0ep-5 };
+const float ansnr_filter2d_ref_s[3*3] = {
+    1.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0,
+    2.0 / 16.0, 4.0 / 16.0, 2.0 / 16.0,
+    1.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0
+};
+const float ansnr_filter2d_dis_s[5*5] = {
+    2.0 / 571.0,  7.0 / 571.0,  12.0 / 571.0,  7.0 / 571.0,  2.0 / 571.0,
+    7.0 / 571.0,  31.0 / 571.0, 52.0 / 571.0,  31.0 / 571.0, 7.0 / 571.0,
+    12.0 / 571.0, 52.0 / 571.0, 127.0 / 571.0, 52.0 / 571.0, 12.0 / 571.0,
+    7.0 / 571.0,  31.0 / 571.0, 52.0 / 571.0,  31.0 / 571.0, 7.0 / 571.0,
+    2.0 / 571.0,  7.0 / 571.0,  12.0 / 571.0,  7.0 / 571.0,  2.0 / 571.0
+};
+#else
+const double ansnr_filter1d_ref_d[3] = { 0x1.00243aee6175bp-2, 0x1.ffb78a233d14ap-2, 0x1.00243aee6175bp-2 };
+const double ansnr_filter1d_dis_d[5] = { 0x1.be5f0dc491a0fp-5, 0x1.f41fd54c58786p-3, 0x1.9c486742831f6p-2, 0x1.f41fd54c58786p-3, 0x1.be5f0dc491a0fp-5 };const double ansnr_filter2d_ref_d[3*3] = {
+    1.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0,
+    2.0 / 16.0, 4.0 / 16.0, 2.0 / 16.0,
+    1.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0
+};
+const double ansnr_filter2d_dis_d[5*5] = {
+    2.0 / 571.0,  7.0 / 571.0,  12.0 / 571.0,  7.0 / 571.0,  2.0 / 571.0,
+    7.0 / 571.0,  31.0 / 571.0, 52.0 / 571.0,  31.0 / 571.0, 7.0 / 571.0,
+    12.0 / 571.0, 52.0 / 571.0, 127.0 / 571.0, 52.0 / 571.0, 12.0 / 571.0,
+    7.0 / 571.0,  31.0 / 571.0, 52.0 / 571.0,  31.0 / 571.0, 7.0 / 571.0,
+    2.0 / 571.0,  7.0 / 571.0,  12.0 / 571.0,  7.0 / 571.0,  2.0 / 571.0
+};
+#endif
+
+static void *aligned_malloc(size_t size, size_t alignment)
+{
+    void *ptr;
+
+    if (posix_memalign(&ptr, alignment, size))
+        return 0;
+    else
+        return ptr;
+}
+
+static void aligned_free(void *ptr)
+{
+    free(ptr);
+}
+
+#ifdef ANSNR_OPT_SINGLE_PRECISION
+static void ansnr_mse_s(const float *ref, const float *dis, float *sig, float *noise, int w, int h, int ref_stride, int dis_stride)
+{
+    int ref_px_stride = ref_stride / sizeof(float);
+    int dis_px_stride = dis_stride / sizeof(float);
+    int i, j;
+
+    float ref_val, dis_val;
+
+    float sig_accum = 0;
+    float noise_accum = 0;
+
+    for (i = 0; i < h; ++i) {
+        float sig_accum_inner = 0;
+        float noise_accum_inner = 0;
+
+        for (j = 0; j < w; ++j) {
+            ref_val = ref[i * ref_px_stride + j];
+            dis_val = dis[i * dis_px_stride + j];
+            sig_accum_inner   += ref_val * ref_val;
+            noise_accum_inner += (ref_val - dis_val) * (ref_val - dis_val);
+        }
+
+        sig_accum   += sig_accum_inner;
+        noise_accum += noise_accum_inner;
+    
+    }
+
+    if (sig)
+        *sig = sig_accum;
+    if (noise)
+        *noise = noise_accum;
+}
+
+#ifdef ANSNR_OPT_FILTER_1D
+static void ansnr_filter1d_s(const float *f, const uint8_t *src, float *dst, int w, int h, int src_stride, int dst_stride, int fwidth)
+{
+    int src_px_stride = src_stride / sizeof(float);
+    int dst_px_stride = dst_stride / sizeof(float);
+
+    float *tmp = aligned_malloc(ALIGN_CEIL(w * sizeof(float)), MAX_ALIGN);
+    float fcoeff, imgcoeff;
+
+    int i, j, fi, fj, ii, jj;
+
+    for (i = 0; i < h; ++i) {
+        /* Vertical pass. */
+        for (j = 0; j < w; ++j) {
+            float accum = 0;
+
+            for (fi = 0; fi < fwidth; ++fi) {
+                fcoeff = f[fi];
+
+                ii = i - fwidth / 2 + fi;
+#ifdef ANSNR_OPT_BORDER_REPLICATE
+                ii = ii < 0 ? 0 : (ii > h - 1 ? h - 1 : ii);
+                imgcoeff = (float)src[ii * src_px_stride + j]+OPT_RANGE_PIXEL_OFFSET;
+#else
+                if (ii < 0) ii = -ii;
+                else if (ii >= h) ii = 2 * h - ii - 1;
+                imgcoeff = (float)src[ii * src_px_stride + j]+OPT_RANGE_PIXEL_OFFSET;
+#endif
+                accum += fcoeff * imgcoeff;
+            }
+
+            tmp[j] = accum;
+        }
+
+        /* Horizontal pass. */
+        for (j = 0; j < w; ++j) {
+            float accum = 0;
+
+            for (fj = 0; fj < fwidth; ++fj) {
+                fcoeff = f[fj];
+
+                jj = j - fwidth / 2 + fj;
+#ifdef ANSNR_OPT_BORDER_REPLICATE
+                jj = jj < 0 ? 0 : (jj > w - 1 ? w - 1 : jj);
+                imgcoeff = tmp[jj];
+#else
+                if (jj < 0) jj = -jj;
+                else if (jj >= w) jj = 2 * w - jj - 1;
+                imgcoeff = tmp[jj];
+#endif
+                accum += fcoeff * imgcoeff;
+            }
+
+            dst[i * dst_px_stride + j] = accum;
+        }
+    }
+
+    aligned_free(tmp);
+}
+#else
+static void ansnr_filter2d_s(const float *f, const uint8_t *src, float *dst, int w, int h, int src_stride, int dst_stride, int fwidth)
+{
+    int src_px_stride = src_stride / sizeof(float);
+    int dst_px_stride = dst_stride / sizeof(float);
+
+    float fcoeff, imgcoeff;
+    int i, j, fi, fj, ii, jj;
+
+    for (i = 0; i < h; ++i) {
+        for (j = 0; j < w; ++j) {
+            float accum = 0;
+
+            for (fi = 0; fi < fwidth; ++fi) {
+                float accum_inner = 0;
+
+                for (fj = 0; fj < fwidth; ++fj) {
+                    fcoeff = f[fi * fwidth + fj];
+
+                    ii = i - fwidth / 2 + fi;
+                    jj = j - fwidth / 2 + fj;
+#ifdef ANSNR_OPT_BORDER_REPLICATE
+                    ii = ii < 0 ? 0 : (ii > h - 1 ? h - 1 : ii);
+                    jj = jj < 0 ? 0 : (jj > w - 1 ? w - 1 : jj);
+                    imgcoeff = (float)src[ii * src_px_stride + jj]+OPT_RANGE_PIXEL_OFFSET;
+#else
+                    if (ii < 0) ii = -ii;
+                    else if (ii >= h) ii = 2 * h - ii - 1;
+                    if (jj < 0) jj = -jj;
+                    else if (jj >= w) jj = 2 * w - jj - 1;
+                    imgcoeff = (float)src[ii * src_px_stride + jj]+OPT_RANGE_PIXEL_OFFSET;
+#endif
+                    accum_inner += fcoeff * imgcoeff;
+                }
+
+                accum += accum_inner;
+            }
+
+            dst[i * dst_px_stride + j] = accum;
+        }
+    }
+}
+#endif
+#else
+static void ansnr_mse_d(const double *ref, const double *dis, double *sig, double *noise, int w, int h, int ref_stride, int dis_stride)
+{
+    int ref_px_stride = ref_stride / sizeof(double);
+    int dis_px_stride = dis_stride / sizeof(double);
+    int i, j;
+
+    double ref_val, dis_val;
+
+    double sig_accum = 0;
+    double noise_accum = 0;
+
+    for (i = 0; i < h; ++i) {
+        double sig_accum_inner = 0;
+        double noise_accum_inner = 0;
+
+        for (j = 0; j < w; ++j) {
+            ref_val = ref[i * ref_px_stride + j];
+            dis_val = dis[i * dis_px_stride + j];
+
+            sig_accum_inner   += ref_val * ref_val;
+            noise_accum_inner += (ref_val - dis_val) * (ref_val - dis_val);
+        }
+
+        sig_accum   += sig_accum_inner;
+        noise_accum += noise_accum_inner;
+    }
+
+    if (sig)
+        *sig = sig_accum;
+    if (noise)
+        *noise = noise_accum;
+}
+#ifdef ANSNR_OPT_FILTER_1D
+static void ansnr_filter1d_d(const double *f, const uint8_t *src, double *dst, int w, int h, int src_stride, int dst_stride, int fwidth)
+{
+    int src_px_stride = src_stride / sizeof(double);
+    int dst_px_stride = dst_stride / sizeof(double);
+
+    double *tmp = aligned_malloc(ALIGN_CEIL(w * sizeof(double)), MAX_ALIGN);
+    double fcoeff, imgcoeff;
+
+    int i, j, fi, fj, ii, jj;
+
+    for (i = 0; i < h; ++i) {
+        /* Vertical pass. */
+        for (j = 0; j < w; ++j) {
+            double accum = 0;
+
+            for (fi = 0; fi < fwidth; ++fi) {
+                fcoeff = f[fi];
+
+                ii = i - fwidth / 2 + fi;
+#ifdef ANSNR_OPT_BORDER_REPLICATE
+                ii = ii < 0 ? 0 : (ii > h - 1 ? h - 1 : ii);
+                imgcoeff = (double)src[ii * src_px_stride + j]+OPT_RANGE_PIXEL_OFFSET;
+#else
+                if (ii < 0) ii = -ii;
+                else if (ii >= h) ii = 2 * h - ii - 1;
+                imgcoeff = (double)src[ii * src_px_stride + j]+OPT_RANGE_PIXEL_OFFSET;
+#endif
+                accum += fcoeff * imgcoeff;
+            }
+
+            tmp[j] = accum;
+        }
+
+        /* Horizontal pass. */
+        for (j = 0; j < w; ++j) {
+            double accum = 0;
+
+            for (fj = 0; fj < fwidth; ++fj) {
+                fcoeff = f[fj];
+
+                jj = j - fwidth / 2 + fj;
+#ifdef ANSNR_OPT_BORDER_REPLICATE
+                jj = jj < 0 ? 0 : (jj > w - 1 ? w - 1 : jj);
+                imgcoeff = tmp[jj];
+#else
+                if (jj < 0) jj = -jj;
+                else if (jj >= w) jj = 2 * w - jj - 1;
+                imgcoeff = tmp[jj];
+#endif
+                accum += fcoeff * imgcoeff;
+            }
+
+            dst[i * dst_px_stride + j] = accum;
+        }
+    }
+
+    aligned_free(tmp);
+}
+#else
+static void ansnr_filter2d_d(const double *f, const uint8_t *src, double *dst, int w, int h, int src_stride, int dst_stride, int fwidth)
+{
+    int src_px_stride = src_stride / sizeof(double);
+    int dst_px_stride = dst_stride / sizeof(double);
+
+    double fcoeff, imgcoeff;
+    int i, j, fi, fj, ii, jj;
+
+    for (i = 0; i < h; ++i) {
+        for (j = 0; j < w; ++j) {
+            double accum = 0;
+
+            for (fi = 0; fi < fwidth; ++fi) {
+                double accum_inner = 0;
+
+                for (fj = 0; fj < fwidth; ++fj) {
+                    fcoeff = f[fi * fwidth + fj];
+
+                    ii = i - fwidth / 2 + fi;
+                    jj = j - fwidth / 2 + fj;
+#ifdef ANSNR_OPT_BORDER_REPLICATE
+                    ii = ii < 0 ? 0 : (ii > h - 1 ? h - 1 : ii);
+                    jj = jj < 0 ? 0 : (jj > w - 1 ? w - 1 : jj);
+                    imgcoeff = (double)src[ii * src_px_stride + jj]+OPT_RANGE_PIXEL_OFFSET;
+#else
+                    if (ii < 0) ii = -ii;
+                    else if (ii >= h) ii = 2 * h - ii - 1;
+                    if (jj < 0) jj = -jj;
+                    else if (jj >= w) jj = 2 * w - jj - 1;
+                    imgcoeff = (double)src[ii * src_px_stride + jj]+OPT_RANGE_PIXEL_OFFSET;
+#endif
+                    accum_inner += fcoeff * imgcoeff;
+                }
+
+                accum += accum_inner;
+            }
+
+            dst[i * dst_px_stride + j] = accum;
+        }
+    }
+}
+#endif
+#endif
+
+static inline
+number_t compute_ansnr(const uint8_t *ref, const uint8_t *dis, int w, int h, double psnr_max, number_t *out)
+{
+    double score=0;
+    int ref_stride=ALIGN_CEIL(w * sizeof(number_t));
+    int dis_stride=ref_stride;
+    number_t *data_buf = 0;
+    char *data_top;
+
+    number_t *ref_filtr;
+    number_t *ref_filtd;
+    number_t *dis_filtd;
+
+    number_t sig, noise;
+
+#ifdef ANSNR_OPT_NORMALIZE
+    number_t noise_min;
+#endif
+
+    int buf_stride = ALIGN_CEIL(w * sizeof(number_t));
+    size_t buf_sz_one = (size_t)buf_stride * h;
+
+    if (SIZE_MAX / buf_sz_one < 3)
+    {
+        goto fail;
+    }
+
+    if (!(data_buf = aligned_malloc(buf_sz_one * 3, MAX_ALIGN)))
+    {
+        goto fail;
+    }
+
+    data_top = (char *)data_buf;
+
+    ref_filtr = (number_t *)data_top; data_top += buf_sz_one;
+    ref_filtd = (number_t *)data_top; data_top += buf_sz_one;
+    dis_filtd = (number_t *)data_top; data_top += buf_sz_one;
+
+#ifdef ANSNR_OPT_FILTER_1D
+    ansnr_filter1d(ansnr_filter1d_ref, ref, ref_filtr, w, h, ref_stride, buf_stride, ansnr_filter1d_ref_width);
+    ansnr_filter1d(ansnr_filter1d_dis, ref, ref_filtd, w, h, ref_stride, buf_stride, ansnr_filter1d_dis_width);
+    ansnr_filter1d(ansnr_filter1d_dis, dis, dis_filtd, w, h, dis_stride, buf_stride, ansnr_filter1d_dis_width);
+#else
+    ansnr_filter2d(ansnr_filter2d_ref, ref, ref_filtr, w, h, ref_stride, buf_stride, ansnr_filter2d_ref_width);
+    ansnr_filter2d(ansnr_filter2d_dis, ref, ref_filtd, w, h, ref_stride, buf_stride, ansnr_filter2d_dis_width);
+    ansnr_filter2d(ansnr_filter2d_dis, dis, dis_filtd, w, h, dis_stride, buf_stride, ansnr_filter2d_dis_width);
+#endif
+
+#ifdef ANSNR_OPT_DEBUG_DUMP
+    write_image("stage/ref_filtr.bin", ref_filtr, w, h, buf_stride, sizeof(number_t));
+    write_image("stage/ref_filtd.bin", ref_filtd, w, h, buf_stride, sizeof(number_t));
+    write_image("stage/dis_filtd.bin", dis_filtd, w, h, buf_stride, sizeof(number_t));
+#endif
+
+    ansnr_mse(ref_filtr, dis_filtd, &sig, &noise, w, h, buf_stride, buf_stride);
+#ifdef ANSNR_OPT_NORMALIZE
+    ansnr_mse(ref_filtr, ref_filtd, 0, &noise_min, w, h, buf_stride, buf_stride);
+    score = 10.0 * log10(noise / (noise - noise_min));
+    *out= noise / (noise - noise_min);
+#else
+    score = noise==0 ? psnr_max : 10.0 * log10(sig / noise);
+    *out = noise==0 ? pow(10, psnr_max/10.0) : sig / noise;
+#endif
+
+fail:
+    aligned_free(data_buf);
+    return score;
+}
+static void set_meta(AVDictionary **metadata, const char *key, char comp, float d)
+{
+    char value[128];
+    snprintf(value, sizeof(value), "%0.2f", d);
+    if (comp) {
+        char key2[128];
+        snprintf(key2, sizeof(key2), "%s%c", key, comp);
+        av_dict_set(metadata, key2, value, 0);
+    } else {
+        av_dict_set(metadata, key, value, 0);
+    }
+}
+
+
+
+
+static int query_formats(AVFilterContext *ctx)
+{
+    static const enum AVPixelFormat pix_fmts[] = {
+        AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
+#define PF_NOALPHA(suf) AV_PIX_FMT_YUV420##suf,  AV_PIX_FMT_YUV422##suf,  AV_PIX_FMT_YUV444##suf
+#define PF_ALPHA(suf)   AV_PIX_FMT_YUVA420##suf, AV_PIX_FMT_YUVA422##suf, AV_PIX_FMT_YUVA444##suf
+#define PF(suf)         PF_NOALPHA(suf), PF_ALPHA(suf)
+        PF(P), PF(P9), PF(P10), PF_NOALPHA(P12), PF_NOALPHA(P14), PF(P16),
+        AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
+        AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
+        AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
+        AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
+        AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
+        AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16,
+        AV_PIX_FMT_NONE
+    };
+
+    AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+    if (!fmts_list)
+        return AVERROR(ENOMEM);
+    return ff_set_common_formats(ctx, fmts_list);
+}
+static AVFrame *do_ansnr(AVFilterContext *ctx, AVFrame *main,
+                        const AVFrame *ref)
+{
+    ANSNRContext *s = ctx->priv;
+    AVDictionary **metadata = avpriv_frame_get_metadatap(main);
+    double psnr_max;
+    char *frame_format = (char *)av_get_pix_fmt_name(main->format);
+    if( !strcmp(frame_format,"yuv420p") || !strcmp(frame_format,"yuv422p") || !strcmp(frame_format,"yuv444p"))
+        psnr_max=60;
+    if( !strcmp(frame_format,"yuv420p10le") || !strcmp(frame_format,"yuv422p10le") || !strcmp(frame_format,"yuv444p10le"))
+        psnr_max=72;
+    number_t out;
+    double score = compute_ansnr(ref->data[0], main->data[0], s->planewidth[0], s->planeheight[0],  psnr_max, &out);
+    s->nb_frames++;
+    s->score=score;
+    s->score_total += out;
+
+    set_meta(metadata, "lavfi.ansnr.All", 0, score);
+
+    if (s->stats_file) {
+        fprintf(s->stats_file, "n:%"PRId64" ", s->nb_frames);
+        fprintf(s->stats_file, "All:%f\n", score);
+    }
+
+    return main;
+}
+
+static av_cold int init(AVFilterContext *ctx)
+{
+    ANSNRContext *s = ctx->priv;
+    s->score_total = 0;
+    s->score = 0;
+    if (s->stats_file_str) {
+        if (s->stats_version < 2 && s->stats_add_max) {
+            av_log(ctx, AV_LOG_ERROR,
+                "stats_add_max was specified but stats_version < 2.\n" );
+            return AVERROR(EINVAL);
+        }
+        if (!strcmp(s->stats_file_str, "-")) {
+            s->stats_file = stdout;
+        } else {
+            s->stats_file = fopen(s->stats_file_str, "w");
+            if (!s->stats_file) {
+                int err = AVERROR(errno);
+                char buf[128];
+                av_strerror(err, buf, sizeof(buf));
+                av_log(ctx, AV_LOG_ERROR, "Could not open stats file %s: %s\n",
+                       s->stats_file_str, buf);
+                return err;
+            }
+        }
+    }
+
+    s->dinput.process = do_ansnr;
+    return 0;
+}
+
+
+
+static int config_input_ref(AVFilterLink *inlink)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+    AVFilterContext *ctx  = inlink->dst;
+    ANSNRContext *s = ctx->priv;
+
+
+    s->nb_components = desc->nb_components;
+
+    if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
+        ctx->inputs[0]->h != ctx->inputs[1]->h) {
+        av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
+        return AVERROR(EINVAL);
+    }
+    if (ctx->inputs[0]->format != ctx->inputs[1]->format) {
+        av_log(ctx, AV_LOG_ERROR, "Inputs must be of same pixel format.\n");
+        return AVERROR(EINVAL);
+    }
+    s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
+    s->comps[0] = s->is_rgb ? 'r' : 'y' ;
+    s->comps[1] = s->is_rgb ? 'g' : 'u' ;
+    s->comps[2] = s->is_rgb ? 'b' : 'v' ;
+    s->comps[3] = 'a';
+
+    s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+    s->planeheight[0] = s->planeheight[3] = inlink->h;
+    s->planewidth[1]  = s->planewidth[2]  = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+    s->planewidth[0]  = s->planewidth[3]  = inlink->w;
+    //if (ARCH_X86)
+    //    ff_ansnr_init_x86(&s->dsp, desc->comp[0].depth);
+
+    return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+    AVFilterContext *ctx = outlink->src;
+    ANSNRContext *s = ctx->priv;
+    AVFilterLink *mainlink = ctx->inputs[0];
+    int ret;
+
+    outlink->w = mainlink->w;
+    outlink->h = mainlink->h;
+    outlink->time_base = mainlink->time_base;
+    outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
+    outlink->frame_rate = mainlink->frame_rate;
+
+    if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
+        return ret;
+
+    return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
+{
+    ANSNRContext *s = inlink->dst->priv;
+    return ff_dualinput_filter_frame(&s->dinput, inlink, inpicref);
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+    ANSNRContext *s = outlink->src->priv;
+    return ff_dualinput_request_frame(&s->dinput, outlink);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+    ANSNRContext *s = ctx->priv;
+
+    if (s->nb_frames > 0) {
+        char buf[256];
+        buf[0] = 0;
+        av_log(ctx, AV_LOG_INFO, "ANSNR%s All:%f\n", buf, 10*log10(s->score_total));
+    }
+
+    ff_dualinput_uninit(&s->dinput);
+
+    if (s->stats_file && s->stats_file != stdout)
+        fclose(s->stats_file);
+
+}
+
+static const AVFilterPad ansnr_inputs[] = {
+    {
+        .name         = "main",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = filter_frame,
+    },{
+        .name         = "reference",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = filter_frame,
+        .config_props = config_input_ref,
+    },
+    { NULL }
+};
+
+static const AVFilterPad ansnr_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .config_props  = config_output,
+        .request_frame = request_frame,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_ansnr = {
+    .name          = "ansnr",
+    .description   = NULL_IF_CONFIG_SMALL("Calculate the ANSNR between two video streams."),
+    .init          = init,
+    .uninit        = uninit,
+    .query_formats = query_formats,
+    .priv_size     = sizeof(ANSNRContext),
+    .priv_class    = &ansnr_class,
+    .inputs        = ansnr_inputs,
+    .outputs       = ansnr_outputs,
+};
