@@ -130,27 +130,26 @@ static int config_input(AVFilterLink *inlink)

     return 0;

 }

-static int draw_slice(AVFilterLink *inlink, int y0, int h, int slice_dir)

+static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)

 {

     DrawBoxContext *drawbox = inlink->dst->priv;

     int plane, x, y, xb = drawbox->x, yb = drawbox->y;

     unsigned char *row[4];

-    AVFilterBufferRef *picref = inlink->cur_buf;

-    for (y = FFMAX(yb, y0); y < y0 + h && y < yb + drawbox->h; y++) {

-        row[0] = picref->data[0] + y * picref->linesize[0];

+    for (y = FFMAX(yb, 0); y < frame->video->h && y < (yb + drawbox->h); y++) {

+        row[0] = frame->data[0] + y * frame->linesize[0];

         for (plane = 1; plane < 3; plane++)

-            row[plane] = picref->data[plane] +

-                picref->linesize[plane] * (y >> drawbox->vsub);

+            row[plane] = frame->data[plane] +

+                 frame->linesize[plane] * (y >> drawbox->vsub);

         if (drawbox->invert_color) {

-            for (x = FFMAX(xb, 0); x < xb + drawbox->w && x < picref->video->w; x++)

+            for (x = FFMAX(xb, 0); x < xb + drawbox->w && x < frame->video->w; x++)

                 if ((y - yb < drawbox->thickness-1) || (yb + drawbox->h - y < drawbox->thickness) ||

                     (x - xb < drawbox->thickness-1) || (xb + drawbox->w - x < drawbox->thickness))

                     row[0][x] = 0xff - row[0][x];

         } else {

-            for (x = FFMAX(xb, 0); x < xb + drawbox->w && x < picref->video->w; x++) {

+            for (x = FFMAX(xb, 0); x < xb + drawbox->w && x < frame->video->w; x++) {

                 double alpha = (double)drawbox->yuv_color[A] / 255;

                 if ((y - yb < drawbox->thickness-1) || (yb + drawbox->h - y < drawbox->thickness) ||

@@ -163,7 +162,7 @@ static int draw_slice(AVFilterLink *inlink, int y0, int h, int slice_dir)

         }

     }

-    return ff_draw_slice(inlink->dst->outputs[0], y0, h, 1);

+    return ff_filter_frame(inlink->dst->outputs[0], frame);

 }

 static const AVFilterPad avfilter_vf_drawbox_inputs[] = {

@@ -172,9 +171,7 @@ static const AVFilterPad avfilter_vf_drawbox_inputs[] = {

         .type             = AVMEDIA_TYPE_VIDEO,

         .config_props     = config_input,

         .get_video_buffer = ff_null_get_video_buffer,

-        .start_frame      = ff_null_start_frame,

-        .draw_slice       = draw_slice,

-        .end_frame        = ff_null_end_frame,

+        .filter_frame     = filter_frame,

         .min_perms        = AV_PERM_WRITE | AV_PERM_READ,

     },

     { NULL }