通用格式为：
rtsp://{user}:{password}@192.168.10.241/Streaming/tracks/{DCHANNEL}01/?starttime={YYYYMMDD}T{HH24MISS}Z&endtime={YYYYMMDD}T{HH24MISS}Z
下面是历史视频的测试地址
通道1的历史视频：
rtsp://admin:hs123456@192.168.120.100:554/Streaming/tracks/101?transportmode=multicast/
通道2的历史视频
rtsp://admin:hs123456@192.168.120.100:554/Streaming/tracks/201/?starttime=20200714T100000Z&endtime=20200714T110000Z