diff --git a/libavfilter/vf_cropdetect.c b/libavfilter/vf_cropdetect.c
index e40609d30d..f91c5220b3 100644
--- a/libavfilter/vf_cropdetect.c
+++ b/libavfilter/vf_cropdetect.c
@@ -117,11 +117,10 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 }
 
-static int end_frame(AVFilterLink *inlink)
+static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
 {
     AVFilterContext *ctx = inlink->dst;
     CropDetectContext *cd = ctx->priv;
-    AVFilterBufferRef *picref = inlink->cur_buf;
     int bpp = cd->max_pixsteps[0];
     int w, h, x, y, shrink_by;
 
@@ -129,36 +128,36 @@ static int end_frame(AVFilterLink *inlink)
     if (++cd->frame_nb > 0) {
         // Reset the crop area every reset_count frames, if reset_count is > 0
         if (cd->reset_count > 0 && cd->frame_nb > cd->reset_count) {
-            cd->x1 = picref->video->w-1;
-            cd->y1 = picref->video->h-1;
+            cd->x1 = frame->video->w-1;
+            cd->y1 = frame->video->h-1;
             cd->x2 = 0;
             cd->y2 = 0;
             cd->frame_nb = 1;
         }
 
         for (y = 0; y < cd->y1; y++) {
-            if (checkline(ctx, picref->data[0] + picref->linesize[0] * y, bpp, picref->video->w, bpp) > cd->limit) {
+            if (checkline(ctx, frame->data[0] + frame->linesize[0] * y, bpp, frame->video->w, bpp) > cd->limit) {
                 cd->y1 = y;
                 break;
             }
         }
 
-        for (y = picref->video->h-1; y > cd->y2; y--) {
-            if (checkline(ctx, picref->data[0] + picref->linesize[0] * y, bpp, picref->video->w, bpp) > cd->limit) {
+        for (y = frame->video->h-1; y > cd->y2; y--) {
+            if (checkline(ctx, frame->data[0] + frame->linesize[0] * y, bpp, frame->video->w, bpp) > cd->limit) {
                 cd->y2 = y;
                 break;
             }
         }
 
         for (y = 0; y < cd->x1; y++) {
-            if (checkline(ctx, picref->data[0] + bpp*y, picref->linesize[0], picref->video->h, bpp) > cd->limit) {
+            if (checkline(ctx, frame->data[0] + bpp*y, frame->linesize[0], frame->video->h, bpp) > cd->limit) {
                 cd->x1 = y;
                 break;
             }
         }
 
-        for (y = picref->video->w-1; y > cd->x2; y--) {
-            if (checkline(ctx, picref->data[0] + bpp*y, picref->linesize[0], picref->video->h, bpp) > cd->limit) {
+        for (y = frame->video->w-1; y > cd->x2; y--) {
+            if (checkline(ctx, frame->data[0] + bpp*y, frame->linesize[0], frame->video->h, bpp) > cd->limit) {
                 cd->x2 = y;
                 break;
             }
@@ -189,12 +188,12 @@ static int end_frame(AVFilterLink *inlink)
 
         av_log(ctx, AV_LOG_INFO,
                "x1:%d x2:%d y1:%d y2:%d w:%d h:%d x:%d y:%d pos:%"PRId64" pts:%"PRId64" t:%f crop=%d:%d:%d:%d\n",
-               cd->x1, cd->x2, cd->y1, cd->y2, w, h, x, y, picref->pos, picref->pts,
-               picref->pts == AV_NOPTS_VALUE ? -1 : picref->pts * av_q2d(inlink->time_base),
+               cd->x1, cd->x2, cd->y1, cd->y2, w, h, x, y, frame->pos, frame->pts,
+               frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base),
                w, h, x, y);
     }
 
-    return ff_end_frame(inlink->dst->outputs[0]);
+    return ff_filter_frame(inlink->dst->outputs[0], frame);
 }
 
 static const AVFilterPad avfilter_vf_cropdetect_inputs[] = {
@@ -203,8 +202,7 @@ static const AVFilterPad avfilter_vf_cropdetect_inputs[] = {
         .type             = AVMEDIA_TYPE_VIDEO,
         .config_props     = config_input,
         .get_video_buffer = ff_null_get_video_buffer,
-        .start_frame      = ff_null_start_frame,
-        .end_frame        = end_frame,
+        .filter_frame     = filter_frame,
     },
     { NULL }
 };