diff --git a/ffmpeg.c b/ffmpeg.c
index 736b7e1c97..84efe0d7c1 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2499,6 +2499,8 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
     for (i = 0; i < ist->nb_filters; i++)
         av_buffersrc_add_frame(ist->filters[i]->filter, decoded_frame, 0);
 
+    decoded_frame->pts = AV_NOPTS_VALUE;
+
     return ret;
 }