As far as i've searched, there's not an easy way to alter the waiting time of a 'wait' command inside a move route, via script calls. So i decided to make up a simple plugin. I made it without altering any other functions, so i doubt there's going to be any compatibility issues.
I made this for myself, because i wanted to animate the eyes of the actors in the hud, so that they look 'alive' as you're playing. To synchronize the changes though, it was required to use 'wait' commands with constantly changing values (even random ones, for eye closing and opening). Anyway, it worked really well for me, so i decided to share.
If you want to do that 'eye' animation i mention above, you just need an event for each actor's face, that has a custom route. Then have a wait command (how long the eyes will be open) a change image command (to close the eyes), a wait command (how long they will remain closed), and another change image command to open the eyes. Now, the problem arises that it looks really fake, since the timing never changes. Well, that's why i created this simple little plugin, to allow for random times (between a min and max value).
Playing around with this, you can even synchronize them to make them look at each other, or change expressions, or anything you can imagine (well, as long as synchronization is concerned).
Note that this does just one thing: It replaces the value of the wait command which you specify in its arguments, whenever the script call is encountered. However, you can edit my code to do whatever else you want, to allow for more complex behaviors!
You can get the plugin here!
Makai/Makai_MoveRoute_Wait.js at master · MichDrog/Makai
Makai plugins are meant for RPGMaker MV. Contribute to MichDrog/Makai development by creating an account on GitHub.

github.com
License:
You can edit and alter this plugin to fit your needs. You can also copy my code for your own plugins.
Just credit me as the original author (if you edit this) or contributor (if you create a new plugin using this).
本贴来自国际rpgmaker官方论坛作者:MiD处,因国际论坛即将永久关站,为了存档多年珍贵资料,署名转载到本论坛存档,由于官方帖子为英文原帖,需要中文翻译请点击论坛顶部切换语言为中文就可以将帖子翻译成中文浏览,方便大家随时查看,原文地址:
https://forums.rpgmakerweb.com/threads/changing-the-wait-duration-of-a-wait-command-inside-a-move-route.127045/