func: static void end_last_frame(AVFilterContext *ctx)
  
  {
  
      TileContext *tile    = ctx->priv;
  
      AVFilterLink *outlink = ctx->outputs[0];
  
      AVFilterBufferRef *out_buf = outlink->out_buf;
  
  
  
      outlink->out_buf = NULL;
  
      ff_start_frame(outlink, out_buf);
  
      while (tile->current < tile->nb_frames)
  
          draw_blank_frame(ctx, out_buf);
  
      ff_draw_slice(outlink, 0, out_buf->video->h, 1);
  
      ff_end_frame(outlink);
  
      tile->current = 0;
  
  }
  