@@ -251,13 +251,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)

     av_frame_copy_props(out, in);

     if (!s->frame) {

+        s->frame = in;

         mode = PROGRESSIVE;

-        s->frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);

-        if (!s->frame) {

-            av_frame_free(&in);

-            av_frame_free(&out);

-            return AVERROR(ENOMEM);

-        }

     } else {

         mode = analyze_plane(ctx, s->mode, s->frame, in);

     }

@@ -269,7 +264,6 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)

         for (y = 0, top = 1; y < s->planeheight[plane]; y++, top ^= 1) {

             memcpy(to, mode == (top ? BOTTOM_FIRST : TOP_FIRST) ? buf : from, s->linesize[plane]);

-            memcpy(buf, from, s->linesize[plane]);

             buf += s->frame->linesize[plane];

             from += in->linesize[plane];

@@ -277,7 +271,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)

         }

     }

-    av_frame_free(&in);

+    if (in != s->frame)

+        av_frame_free(&s->frame);

+    s->frame = in;

     return ff_filter_frame(outlink, out);

 }