rtpdec_asf: Set the no_resync_search option for the chained asf demuxer

Searching for packet markers doesn't make sense for this use case,
where packets are fed one at a time to the demuxer.

This fixes playing back streams that have packets not starting
with the 0x82, 0x00, 0x00 marker.

Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/rtpdec_asf.c

@@ -99,6 +99,7 @@ int ff_wms_parse_sdp_a_line(AVFormatContext *s, const char *p)
     if (av_strstart(p, "pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,", &p)) {
         AVIOContext pb;
         RTSPState *rt = s->priv_data;
+        AVDictionary *opts = NULL;
         int len = strlen(p) * 6 / 8;
         char *buf = av_mallocz(len);
         av_base64_decode(buf, p, len);
@@ -113,7 +114,9 @@ int ff_wms_parse_sdp_a_line(AVFormatContext *s, const char *p)
         if (!(rt->asf_ctx = avformat_alloc_context()))
             return AVERROR(ENOMEM);
         rt->asf_ctx->pb      = &pb;
-        ret = avformat_open_input(&rt->asf_ctx, "", &ff_asf_demuxer, NULL);
+        av_dict_set(&opts, "no_resync_search", "1", 0);
+        ret = avformat_open_input(&rt->asf_ctx, "", &ff_asf_demuxer, &opts);
+        av_dict_free(&opts);
         if (ret < 0)
             return ret;
         av_dict_copy(&s->metadata, rt->asf_ctx->metadata, 0);