diff --git a/libavformat/rtpdec_asf.c b/libavformat/rtpdec_asf.c
index db872ce398..e31a825c2a 100644
--- a/libavformat/rtpdec_asf.c
+++ b/libavformat/rtpdec_asf.c
@@ -112,6 +112,7 @@ int ff_wms_parse_sdp_a_line(AVFormatContext *s, const char *p)
         ret = av_open_input_stream(&rt->asf_ctx, &pb, "", &asf_demuxer, NULL);
         if (ret < 0)
             return ret;
+        av_metadata_copy(&s->metadata, rt->asf_ctx->metadata, 0);
         rt->asf_pb_pos = url_ftell(&pb);
         av_free(buf);
         rt->asf_ctx->pb = NULL;