添加国标级联录像控制功能；

mk1990

2022-06-22 8eff2f1d11c0fdd85fbd1654279e4928ccc587dd

 src/main/java/com/genersoft/iot/vmp/gb28181/utils/SipUtils.java

@@ -25,7 +25,9 @@
     * */
    public static String getChannelIdFromHeader(Request request) {
        Header subject = request.getHeader("subject");
        if (subject == null) return null;
        if (subject == null) {
            return null;
        }
        return ((Subject) subject).getSubject().split(":")[0];
    }