diff --git a/libavformat/utils.c b/libavformat/utils.c
index dfdc51de37..d6035d9f24 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -4198,6 +4198,7 @@ void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
         return;
     }
     s->time_base = new_tb;
+    av_codec_set_pkt_timebase(s->codec, new_tb);
     s->pts_wrap_bits = pts_wrap_bits;
 }