怎么往前推出正确地址（不是往后）

怎么往前推出正确地址，如果是错误数字返回的是 404 ，正确是 200 。

有规律，但有一点点随机
https://pull-hls-f16-va01.tiktokcdn.com/activity/stream-2994225020559425613_uhd/1901848974-1667782833-20221107T011336.ts
1901848974-1667782833-20221107T011336.ts
1901848974-1667782834-20221107T011339.ts
1901848974-1667782835-20221107T011342.ts
1901848974-1667782836-20221107T011345.ts
1901848974-1667782837-20221107T011349.ts
1901848974-1667782838-20221107T011353.ts
1901848974-1667782839-20221107T011357.ts
1901848974-1667782840-20221107T011401.ts
1901848974-1667782841-20221107T011404.ts
1901848974-1667782842-20221107T011407.ts
1901848974-1667782843-20221107T011410.ts
1901848974-1667782844-20221107T011412.ts
1901848974-1667782845-20221107T011414.ts
1901848974-1667782846-20221107T011417.ts
1901848974-1667782847-20221107T011420.ts
1901848974-1667782848-20221107T011422.ts
1901848974-1667782849-20221107T011425.ts
1901848974-1667782850-20221107T011427.ts
1901848974-1667782851-20221107T011430.ts
1901848974-1667782852-20221107T011433.ts
1901848974-1667782853-20221107T011435.ts
1901848974-1667782854-20221107T011437.ts
1901848974-1667782855-20221107T011441.ts
1901848974-1667782856-20221107T011443.ts
1901848974-1667782857-20221107T011447.ts
1901848974-1667782858-20221107T011450.ts
1901848974-1667782859-20221107T011452.ts
1901848974-1667782860-20221107T011456.ts
1901848974-1667782861-20221107T011458.ts
1901848974-1667782862-20221107T011500.ts
1901848974-1667782863-20221107T011503.ts
1901848974-1667782864-20221107T011505.ts
1901848974-1667782865-20221107T011508.ts
1901848974-1667782866-20221107T011510.ts
1901848974-1667782867-20221107T011512.ts
1901848974-1667782868-20221107T011515.ts
1901848974-1667782869-20221107T011518.ts
1901848974-1667782870-20221107T011521.ts
1901848974-1667782871-20221107T011523.ts
1901848974-1667782872-20221107T011525.ts
1901848974-1667782873-20221107T011529.ts
1901848974-1667782874-20221107T011533.ts
1901848974-1667782875-20221107T011535.ts
1901848974-1667782876-20221107T011538.ts
1901848974-1667782877-20221107T011541.ts
1901848974-1667782878-20221107T011545.ts
1901848974-1667782879-20221107T011548.ts
1901848974-1667782880-20221107T011552.ts
1901848974-1667782881-202211077011555.ts
1901848974-1667782882-20221107T011557.ts
1901848974-1667782883-20221107T011559.ts
1901848974-1667782884-20221107T011602.ts
1901848974-1667782885-20221107T011604.ts
1901848974-1667782886-20221107T011606.ts
1901848974-1667782887-20221107T011609.ts
1901848974-1667782888-20221107T011612.ts
1901848974-1667782889-20221107T011615.ts
1901848974-1667782890-20221107T011617.ts
1901848974-1667782891-20221107T011619.ts
1901848974-1667782892-20221107T011622.ts
1901848974-1667782893-20221107T011625.ts
1901848974-1667782894-20221107T011628.ts
1901848974-1667782895-20221107T011631.ts
1901848974-1667782896-20221107T011634.ts
1901848974-1667782897-20221107T011636.ts
1901848974-1667782898-20221107T011639.ts
1901848974-1667782899-20221107T011642.ts
1901848974-1667782900-20221107T011644.ts
1901848974-1667782901-20221107T011646.ts
1901848974-1667782902-20221107T011648.ts

cpstar

2022-11-07 10:19:00 +08:00

我还以为倒退 stream 那一串，但也不是不能推，stream 是固定的，然后 299 应该是这个用户的 ID ，不能推测其他的，uhd 就是清晰度，估计还有 fhd 之类的

然后具体文件这不就是典型的等差数列？
第一节 199 应该是本次直播的 ID ，不能推测
第二节时间戳，可以理解为入库，可以理解为其他，但是明显是一个自增 1 的，倒推就减 1 。
第三节显然 RFC3339 ，2-4 秒一个切片 ts ，也就是直播 UTC 的时间。
往前倒退一个文件应该是
大概率 1901848974-1667782832-20221107T011333.ts
小概率 1901848974-1667782832-20221107T011334.ts 或者 1901848974-1667782832-20221107T011332.ts