diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index 96f49c8adb..2735c6667d 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -900,6 +900,12 @@ void ff_er_frame_end(MpegEncContext *s)
         return;
     };
 
+    if (s->picture_structure == PICT_FRAME &&
+        s->current_picture.f.linesize[0] != s->current_picture_ptr->f.linesize[0]) {
+        av_log(s->avctx, AV_LOG_ERROR, "Error concealment not possible, frame not fully initialized\n");
+        return;
+    }
+
     if (s->current_picture.f.motion_val[0] == NULL) {
         av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");