static int
rdt_parse_sdp_line (AVFormatContext *s, int st_index,
                    PayloadContext *rdt, const char *line)
{
    AVStream *stream = s->streams[st_index];
    const char *p = line;

    if (av_strstart(p, "OpaqueData:buffer;", &p)) {
        rdt->mlti_data = rdt_parse_b64buf(&rdt->mlti_data_size, p);
    } else if (av_strstart(p, "StartTime:integer;", &p))
        stream->first_dts = atoi(p);
    else if (av_strstart(p, "ASMRuleBook:string;", &p)) {
        int n, first = -1;

        for (n = 0; n < s->nb_streams; n++)
            if (s->streams[n]->priv_data == stream->priv_data) {
                int count = s->streams[n]->index + 1;
                if (first == -1) first = n;
                if (rdt->nb_rmst < count) {
                    RMStream **rmst= av_realloc(rdt->rmst, count*sizeof(*rmst));
                    if (!rmst)
                        return AVERROR(ENOMEM);
                    memset(rmst + rdt->nb_rmst, 0,
                           (count - rdt->nb_rmst) * sizeof(*rmst));
                    rdt->rmst    = rmst;
                    rdt->nb_rmst = count;
                }
                rdt->rmst[s->streams[n]->index] = ff_rm_alloc_rmstream();
                rdt_load_mdpr(rdt, s->streams[n], (n - first) * 2);

                if (s->streams[n]->codec->codec_id == CODEC_ID_AAC)
                    s->streams[n]->codec->frame_size = 1; // FIXME
           }
    }

    return 0;
}