diff --git a/libavformat/utils.c b/libavformat/utils.c
index 13de68a238..f9acc0e7f1 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -771,6 +771,8 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
         if (pktl) {
             *pkt = pktl->pkt;
             st = s->streams[pkt->stream_index];
+            if (s->raw_packet_buffer_remaining_size <= 0)
+                probe_codec(s, st, NULL);
             if(st->request_probe <= 0){
                 s->raw_packet_buffer = pktl->next;
                 s->raw_packet_buffer_remaining_size += pkt->size;