求助 Java 实现下载 rtsp 协议的网络视频

[Paul1024]

求助 Java 实现下载 rtsp 协议的网络视频。
在网上（ https://blog.csdn.net/mengzhengjie/article/details/45133083 ）找到代码，替换了视频的地址。
运行后日志：
$ java RTSPClient
端口打开成功
OPTIONS rtsp://newvod.ahbbtv.com:1935/vod/_definst_/mp4:vod/2019/5/30 RTSP/1.0
Cseq: 1


返回内容：
RTSP/1.0 200 OK
CSeq: 1
Server: Wowza Streaming Engine 4.1.2 build13947
Cache-Control: no-cache
Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, OPTIONS, ANNOUNCE, RECORD, GET_PARAMETER
Supported: play.basic, con.persistent


DESCRIBE rtsp://newvod.ahbbtv.com:1935/vod/_definst_/mp4:vod/2019/5/30/2019_5_30_20_23_31_10370_576P_600k.mp4?akrstarttime=1559318076&akrendtime=1559404476&akrCustomParameter=akr1559318076332&akrhash=PGuLYS-4IzT4kRFDZHttng5k1KpgUdbH40a9UJjEs5A= RTSP/1.0
Cseq: 2


返回内容：
RTSP/1.0 200 OK
CSeq: 2
Server: Wowza Streaming Engine 4.1.2 build13947
Cache-Control: no-cache
Expires: Mon, 3 Jun 2019 10:10:29 HKT
Content-Length: 620
Content-Base: rtsp://newvod.ahbbtv.com:1935/vod/_definst_/mp4:vod/2019/5/30/2019_5_30_20_23_31_10370_576P_600k.mp4/
Date: Mon, 3 Jun 2019 10:10:29 HKT
Content-Type: application/sdp
Session: 230416585;timeout=60

v=0
o=- 230416585 230416585 IN IP4 127.0.0.1
s=vod/2019/5/30/2019_5_30_20_23_31_10370_576P_600k.mp4
c=IN IP4 0.0.0.0
t=0 0
a=sdplang:en
a=range:npt=0- 1673.628
a=control:*
m=audio 0 RTP/AVP 96
a=rtpmap:96 mpeg4-generic/44100/2
a=fmtp:96 profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1210
a=control:trackID=1
m=video 0 RTP/AVP 97
a=rtpmap:97 H264/90000
a=fmtp:97 packetization-mode=1;profile-level-id=64001E;sprop-parameter-sets=Z2QAHqzZQLQSb/wAQAA8QAAAAwBAAAAMg8WLZYA=,aOvssiw=
a=cliprect:0,0,576,720
a=framesize:97 720-576
a=framerate:25.0
a=control:trackID=2

SETUP rtsp://newvod.ahbbtv.com:1935/vod/_definst_/mp4:vod/2019/5/30/2019_5_30_20_23_31_10370_576P_600k.mp4?akrstarttime=1559318076&akrendtime=1559404476&akrCustomParameter=akr1559318076332&akrhash=PGuLYS-4IzT4kRFDZHttng5k1KpgUdbH40a9UJjEs5A=/trackID=1
m=video 0 RTP/AVP 97
a=rtpmap:97 H264/90000
a=fmtp:97 packetization-mode=1;profile-level-id=64001E;sprop-parameter-sets=Z2QAHqzZQLQSb/wAQAA8QAAAAwBAAAAMg8WLZYA=,aOvssiw=
a=cliprect:0,0,576,720
a=framesize:97 720-576
a=framerate:25.0
a=control:trackID=2
RTSP/1.0
Cseq: 3
Transport: RTP/AVP;UNICAST;client_port=16264-16265;mode=play


接收到数据为空,重新启动连接

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拜托，大佬指点迷津。我改如何下载这段视频呢？？