前端在使用EasyPlayer插件加载.mp4视频流时，如果视频不同源在使用图片快照时会报EasyPlayer-element.min.js:1 Uncaught SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported. at a.saveLocalSnapshot (EasyPlayer-element.min.js:1:2070232) at a.i [as saveLocalSnapshot] (EasyPlayer-element.min.js:21:1439) at HTMLButtonElement. (EasyPlayer-element.min.js:1:2068191) 的错误
解决方式：easy-player播放器自带截图功能报错时，需手动设置document.querySelector('video').crossOrigin = 'anonymous'
