diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 09a77c48526aa4c62a75e29602d26a32a7b25ff2..b57929eda10842cca6ec7afe4f1a99db3699ce56 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -713,13 +713,13 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
         st = s->streams[i];
         if (stream_type == FLV_STREAM_TYPE_AUDIO) {
             if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
-                flv_same_audio_codec(st->codec, flags)) {
+                (s->audio_codec_id || flv_same_audio_codec(st->codec, flags))) {
                 break;
             }
         } else
         if (stream_type == FLV_STREAM_TYPE_VIDEO) {
             if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
-                flv_same_video_codec(st->codec, flags)) {
+                (s->video_codec_id || flv_same_video_codec(st->codec, flags))) {
                 break;
             }
         } else if (stream_type == FLV_STREAM_TYPE_DATA) {