主要修改water滤镜，可以在win系统上正常运行；

ffplay -i sample.mp4 -vf "frei0r=water:2|1|1|1|0|0|30/30"

参数说明

    register_param(physics, "physics", "water density: from 1 to 4");
    register_param(swirl, "swirl", "swirling whirpool in the center");
    register_param(rain, "rain", "rain drops all over");
    register_param(surfer, "surfer", "surf the surface with a wandering finger");
    register_param(smooth, "smooth", "smooth up all perturbations on the surface");
    register_param(distort, "distort", "distort all surface like dropping a bucket to the floor");
    register_param(position, "position", "swirl position coordinate, Relative center coordinate");

position是设置漩涡的中心坐标，相对于视频画面中心坐标，比如设置0/0就是画面中心，不是画面的左上角；
下载地址：
https://gitee.com/nlsoft/frei0r_win32/releases
https://github.com/qq2225936589/frei0r_win32/releases