diff --git a/libavformat/Makefile b/libavformat/Makefile
index 5fa24cef16..67778ff798 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -670,3 +670,4 @@ TOOLS     = aviocat                                                     \
             probetest                                                   \
             seek_print                                                  \
             sidxindex                                                   \
+            venc_data_dump
diff --git a/tests/fate/vpx.mak b/tests/fate/vpx.mak
index c65959f133..49a2c6f230 100644
--- a/tests/fate/vpx.mak
+++ b/tests/fate/vpx.mak
@@ -163,5 +163,9 @@ FATE_VP9-$(CONFIG_IVF_DEMUXER) += fate-vp9-05-resize
 fate-vp9-05-resize: CMD = framemd5 -i $(TARGET_SAMPLES)/vp9-test-vectors/vp90-2-05-resize.ivf -s 352x288 -sws_flags bitexact+bilinear
 fate-vp9-05-resize: REF = $(SRC_PATH)/tests/ref/fate/vp9-05-resize
 
+FATE_VP9-$(CONFIG_MATROSKA_DEMUXER) += fate-vp9-encparams
+fate-vp9-encparams: CMD = run tools/venc_data_dump$(EXESUF) $(TARGET_SAMPLES)/vp9-test-vectors/vp90-2-segmentation-aq-akiyo.webm 0 \
+ $(THREADS) $(THREAD_TYPE)
+
 FATE_SAMPLES_AVCONV-$(CONFIG_VP9_DECODER) += $(FATE_VP9-yes)
 fate-vp9: $(FATE_VP9-yes)
diff --git a/tests/ref/fate/vp9-encparams b/tests/ref/fate/vp9-encparams
new file mode 100644
index 0000000000..515f390cf3
--- /dev/null
+++ b/tests/ref/fate/vp9-encparams
@@ -0,0 +1,3279 @@
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diff --git a/tools/venc_data_dump.c b/tools/venc_data_dump.c
new file mode 100644
index 0000000000..86a30a3f2d
--- /dev/null
+++ b/tools/venc_data_dump.c
@@ -0,0 +1,186 @@
+/*
+ * 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 <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "libavutil/common.h"
+#include "libavutil/dict.h"
+#include "libavutil/error.h"
+#include "libavutil/video_enc_params.h"
+
+#include "libavformat/avformat.h"
+
+#include "libavcodec/avcodec.h"
+
+static int decode_read(AVCodecContext *decoder, AVFrame *frame, int flush)
+{
+    const int ret_done = flush ? AVERROR_EOF : AVERROR(EAGAIN);
+    int ret = 0;
+
+    while (ret >= 0) {
+        AVFrameSideData *sd;
+
+        ret = avcodec_receive_frame(decoder, frame);
+        if (ret < 0)
+            return (ret == ret_done) ? 0 : ret;
+
+        fprintf(stdout, "frame %d\n", decoder->frame_number - 1);
+
+        sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS);
+        if (sd) {
+            AVVideoEncParams *par = (AVVideoEncParams*)sd->data;
+
+            fprintf(stdout, "AVVideoEncParams %d\n", par->type);
+            fprintf(stdout, "qp %d\n", par->qp);
+            for (int i = 0; i < FF_ARRAY_ELEMS(par->delta_qp); i++)
+                for (int j = 0; j < FF_ARRAY_ELEMS(par->delta_qp); j++) {
+                    if (par->delta_qp[i][j])
+                        fprintf(stdout, "delta_qp[%d][%d] %"PRId32"\n", i, j, par->delta_qp[i][j]);
+                }
+
+            if (par->nb_blocks) {
+                fprintf(stdout, "nb_blocks %d\n", par->nb_blocks);
+                for (int i = 0; i < par->nb_blocks; i++) {
+                    AVVideoBlockParams *b = av_video_enc_params_block(par, i);
+
+                    fprintf(stdout, "block %d %d:%d %dx%d %"PRId32"\n",
+                            i, b->src_x, b->src_y, b->w, b->h, b->delta_qp);
+                }
+            }
+        }
+
+        av_frame_unref(frame);
+    }
+
+    return 0;
+}
+
+static int decoder_init(AVFormatContext *demuxer, int stream_idx,
+                        AVCodecContext **dec, AVDictionary **opts)
+{
+    const AVCodec *codec;
+    int ret;
+
+    if (stream_idx < 0 || stream_idx >= demuxer->nb_streams)
+        return AVERROR(EINVAL);
+
+    codec = avcodec_find_decoder(demuxer->streams[stream_idx]->codecpar->codec_id);
+    if (!codec)
+        return AVERROR_DECODER_NOT_FOUND;
+
+    *dec = avcodec_alloc_context3(codec);
+    if (!*dec)
+        return AVERROR(ENOMEM);
+
+    ret = avcodec_open2(*dec, NULL, opts);
+    if (ret < 0)
+        return ret;
+
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    AVFormatContext *demuxer = NULL;
+    AVCodecContext  *decoder = NULL;
+    AVDictionary       *opts = NULL;
+
+    AVPacket *pkt   = NULL;
+    AVFrame  *frame = NULL;
+
+    unsigned int stream_idx;
+    const char *filename, *thread_type = NULL, *nb_threads = NULL;
+    int ret = 0;
+
+    if (argc <= 2) {
+        fprintf(stderr, "Usage: %s <input file> <stream index> [<thread count> <thread type>]\n", argv[0]);
+        return 0;
+    }
+
+    filename    = argv[1];
+    stream_idx  = strtol(argv[2], NULL, 0);
+    if (argc > 4) {
+        nb_threads  = argv[3];
+        thread_type = argv[4];
+    }
+
+    ret  = av_dict_set(&opts, "threads",          nb_threads,    0);
+    ret |= av_dict_set(&opts, "thread_type",      thread_type,   0);
+    ret |= av_dict_set(&opts, "export_side_data", "venc_params", 0);
+
+    ret = avformat_open_input(&demuxer, filename, NULL, NULL);
+    if (ret < 0) {
+        fprintf(stderr, "Error opening input file: %d\n", ret);
+        return ret;
+    }
+
+    ret = decoder_init(demuxer, stream_idx, &decoder, &opts);
+    if (ret < 0) {
+        fprintf(stderr, "Error initializing decoder\n");
+        goto finish;
+    }
+
+    pkt   = av_packet_alloc();
+    frame = av_frame_alloc();
+    if (!pkt || !frame) {
+        ret = AVERROR(ENOMEM);
+        goto finish;
+    }
+
+    while (ret >= 0) {
+        ret = av_read_frame(demuxer, pkt);
+        if (ret < 0)
+            goto flush;
+        if (pkt->stream_index != stream_idx) {
+            av_packet_unref(pkt);
+            continue;
+        }
+
+        ret = avcodec_send_packet(decoder, pkt);
+        if (ret < 0) {
+            fprintf(stderr, "Error decoding: %d\n", ret);
+            goto finish;
+        }
+        av_packet_unref(pkt);
+
+        ret = decode_read(decoder, frame, 0);
+        if (ret < 0) {
+            fprintf(stderr, "Error decoding: %d\n", ret);
+            goto finish;
+        }
+    }
+
+flush:
+    avcodec_send_packet(decoder, NULL);
+    ret = decode_read(decoder, frame, 1);
+    if (ret < 0) {
+        fprintf(stderr, "Error flushing: %d\n", ret);
+        goto finish;
+    }
+
+finish:
+    av_dict_free(&opts);
+    av_packet_free(&pkt);
+    av_frame_free(&frame);
+    avcodec_free_context(&decoder);
+    avformat_close_input(&demuxer);
+
+    return ret;
+}
