ios中视频的最后一桢问题解决

function video2Base64 (video: HTMLVideoElement) {

 let dataURL = '',
 canvas = document.createElement("canvas");

 if (video.videoWidth !== 0) {
 canvas.width = video.videoWidth;
 canvas.height = video.videoHeight;

 (canvas.getContext("2d") as CanvasDrawImage).drawImage(video, 0, 0, canvas.width, canvas.height); //绘制canvas
 dataURL = canvas.toDataURL('image/jpeg'); //转换为base64
 // 将截取的视频图片设置为视频的背景
 video.setAttribute("style", `background-image: url(${dataURL}); background-size: contain; background-position: center;background-repeat: no-repeat;`);
 }
}