diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 0a3329d2c8..566c0d2e2c 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -1468,7 +1468,11 @@ int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
                 return i;
             }
             s->last_picture_ptr = &s->picture[i];
+
             s->last_picture_ptr->f.key_frame = 0;
+            s->last_picture_ptr->f.reference   = 3;
+            s->last_picture_ptr->f.pict_type = AV_PICTURE_TYPE_P;
+
             if (ff_alloc_picture(s, s->last_picture_ptr, 0) < 0) {
                 s->last_picture_ptr = NULL;
                 return -1;
@@ -1494,6 +1498,9 @@ int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
             }
             s->next_picture_ptr = &s->picture[i];
             s->next_picture_ptr->f.key_frame = 0;
+            s->next_picture_ptr->f.reference   = 3;
+            s->next_picture_ptr->f.pict_type = AV_PICTURE_TYPE_P;
+
             if (ff_alloc_picture(s, s->next_picture_ptr, 0) < 0) {
                 s->next_picture_ptr = NULL;
                 return -1;