1.代码如下

<template><div class="box"><div class="video-box"><video controls ref="videoRef" preload="true"src="https://qt-minio.ictshop.com.cn:9000/resource-management/2025/01/08/7b96ac9d957c45a7a94b355ca7a89d02.mp4"></video><a-button type="primary" @click="saveCoverImg" :loading="loading">{{ loading ? '截取中': '保存为封面' }}</a-button></div><img :src="coverImg" alt=""></div>
</template>
<script setup>
import { ref, onMounted } from 'vue';const videoRef = ref(null)
const coverImg = ref(null)
const loading = ref(false)function saveCoverImg() {videoRef.value.pause();loading.value = true;const currentTime = videoRef.value.currentTime;createVideo(currentTime)
}function createVideo(currentTime) {const videoElement = document.createElement("video");videoElement.setAttribute("crossorigin", "anonymous"); // 解决跨域问题videoElement.currentTime = currentTimevideoElement.muted = true;videoElement.autoplay = true;videoElement.oncanplay = function () {drawCoverImage(videoElement)}videoElement.src = "https://qt-minio.ictshop.com.cn:9000/resource-management/2025/01/08/7b96ac9d957c45a7a94b355ca7a89d02.mp4";
}function drawCoverImage(vEle) {const c = document.createElement("canvas");const ctx = c.getContext("2d");c.width = vEle.videoWidth;c.height = vEle.videoHeight;ctx.drawImage(vEle, 0, 0, c.width, c.height);const img = c.toDataURL("image/png");coverImg.value = img;loading.value = false;
}</script><style lang="less" scoped>
.box {.video-box {display: flex;align-items: flex-end;video {width: 490px;margin: 10px 10px 0 0;}}img {width: 300px;margin-top: 10px;}
}
</style>