@@ -63,19 +63,18 @@ static AVFilterPicRef *get_video_buffer(AVFilterLink *link, int perms,

 static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)

 {

     FlipContext *flip = link->dst->priv;

-    AVFilterPicRef *ref2 = avfilter_ref_pic(picref, ~0);

     int i;

     for (i = 0; i < 4; i ++) {

         int vsub = i == 1 || i == 2 ? flip->vsub : 0;

-        if (ref2->data[i]) {

-            ref2->data[i] += ((link->h >> vsub)-1) * ref2->linesize[i];

-            ref2->linesize[i] = -ref2->linesize[i];

+        if (picref->data[i]) {

+            picref->data[i] += ((link->h >> vsub)-1) * picref->linesize[i];

+            picref->linesize[i] = -picref->linesize[i];

         }

     }

-    avfilter_start_frame(link->dst->outputs[0], ref2);

+    avfilter_start_frame(link->dst->outputs[0], picref);

 }

 static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)

@@ -96,6 +95,7 @@ AVFilter avfilter_vf_vflip = {

                                     .get_video_buffer = get_video_buffer,

                                     .start_frame      = start_frame,

                                     .draw_slice       = draw_slice,

+                                    .end_frame        = avfilter_null_end_frame,

                                     .config_props     = config_input, },

                                   { .name = NULL}},

     .outputs   = (AVFilterPad[]) {{ .name             = "default",