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仿抖音视频封面选择的demo

本Demo是用在学习抖音的项目Alpface

原理:通过cover控件相对父控件frame的比例,计算出视频封面动图的起始和结束时间,并开启定时间监听视频播放的时间进度,当播放到封面结束时间时,将视频seek到封面的起始时间,以达到重复播放动图的效果。

demo.gif

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