diff --git a/libavfilter/vf_minterpolate.c b/libavfilter/vf_minterpolate.c
index e1fe5e32b5..bf45662913 100644
--- a/libavfilter/vf_minterpolate.c
+++ b/libavfilter/vf_minterpolate.c
@@ -368,6 +368,15 @@ static int config_input(AVFilterLink *inlink)
                    2 * mi_ctx->mb_size);
             return AVERROR(EINVAL);
         }
+        ff_me_init_context(me_ctx, mi_ctx->mb_size, mi_ctx->search_param,
+                           width, height, 0, (mi_ctx->b_width - 1) << mi_ctx->log2_mb_size,
+                           0, (mi_ctx->b_height - 1) << mi_ctx->log2_mb_size);
+
+        if (mi_ctx->me_mode == ME_MODE_BIDIR)
+            me_ctx->get_cost = &get_sad_ob;
+        else if (mi_ctx->me_mode == ME_MODE_BILAT)
+            me_ctx->get_cost = &get_sbad_ob;
+
         mi_ctx->pixel_mvs = av_mallocz_array(width * height, sizeof(PixelMVS));
         mi_ctx->pixel_weights = av_mallocz_array(width * height, sizeof(PixelWeights));
         mi_ctx->pixel_refs = av_mallocz_array(width * height, sizeof(PixelRefs));
@@ -395,13 +404,6 @@ static int config_input(AVFilterLink *inlink)
             return AVERROR(EINVAL);
     }
 
-    ff_me_init_context(me_ctx, mi_ctx->mb_size, mi_ctx->search_param, width, height, 0, (mi_ctx->b_width - 1) << mi_ctx->log2_mb_size, 0, (mi_ctx->b_height - 1) << mi_ctx->log2_mb_size);
-
-    if (mi_ctx->me_mode == ME_MODE_BIDIR)
-        me_ctx->get_cost = &get_sad_ob;
-    else if (mi_ctx->me_mode == ME_MODE_BILAT)
-        me_ctx->get_cost = &get_sbad_ob;
-
     return 0;
 fail:
     for (i = 0; i < NB_FRAMES; i++)
@@ -830,9 +832,10 @@ static int inject_frame(AVFilterLink *inlink, AVFrame *avf_in)
     return 0;
 }
 
-static int detect_scene_change(MIContext *mi_ctx)
+static int detect_scene_change(AVFilterContext *ctx)
 {
-    AVMotionEstContext *me_ctx = &mi_ctx->me_ctx;
+    MIContext *mi_ctx = ctx->priv;
+    AVFilterLink *input = ctx->inputs[0];
     uint8_t *p1 = mi_ctx->frames[1].avf->data[0];
     ptrdiff_t linesize1 = mi_ctx->frames[1].avf->linesize[0];
     uint8_t *p2 = mi_ctx->frames[2].avf->data[0];
@@ -841,9 +844,9 @@ static int detect_scene_change(MIContext *mi_ctx)
     if (mi_ctx->scd_method == SCD_METHOD_FDIFF) {
         double ret = 0, mafd, diff;
         uint64_t sad;
-        mi_ctx->sad(p1, linesize1, p2, linesize2, me_ctx->width, me_ctx->height, &sad);
+        mi_ctx->sad(p1, linesize1, p2, linesize2, input->w, input->h, &sad);
         emms_c();
-        mafd = (double) sad * 100.0 / (me_ctx->height * me_ctx->width) / (1 << mi_ctx->bitdepth);
+        mafd = (double) sad * 100.0 / (input->h * input->w) / (1 << mi_ctx->bitdepth);
         diff = fabs(mafd - mi_ctx->prev_mafd);
         ret  = av_clipf(FFMIN(mafd, diff), 0, 100.0);
         mi_ctx->prev_mafd = mafd;
@@ -1191,7 +1194,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *avf_in)
     if (!mi_ctx->frames[0].avf)
         return 0;
 
-    mi_ctx->scene_changed = detect_scene_change(mi_ctx);
+    mi_ctx->scene_changed = detect_scene_change(ctx);
 
     for (;;) {
         AVFrame *avf_out;