想在dplayer播放器中实现弹幕不遮挡人物的功能点。1.在vue文件中，div标签引入dplayer： id="dplay"/>2.在ts文件中，初始化dplayer对象：//初始化播放器 const dp = new DPlayer({ container: videoRef.value, loop: true, // 循环播放 lang: "zh-cn", // 语言 logo: "", autoplay: false,//todo：开发阶段先关闭自动播放 danmaku: { id: videoID.value.toString(),//弹幕池id，需要唯一 api: danmakuApi, token: userStore.userInfoData.token,//弹幕后端验证 token unlimited: true, }, mutex: false, // 互斥，阻止多个播放器同时播放 video: { quality: quality, defaultQuality: 0, url: "不填", pic: videoInfo.videoInfo.cover, }, }); dp.video.crossOrigin='anonymous' //解决canvas跨域错误3.加载tf开源人物分割模型：const model=bodySegmentation.SupportedModels.MediaPipeSelfieSegmentation const segmenterConfig:MediaPipeSelfieSegmentationMediaPipeModelConfig={ runtime: 'mediapipe', // or 'tfjs' solutionPath: 'https://cdn.jsdelivr.net/npm/@mediapipe/selfie_segmentation', modelType: 'general' } const segmenter=await bodySegmentation.createSegmenter(model,segmenterConfig)4.检测每一帧，绘制出二进制mask文件：dp.on("timeupdate",async ()=>{ //初始化canvas，设置width和height const canvas=document.createElement('canvas') canvas.width=dp.video.videoWidth canvas.height=dp.video.videoHeight //1.绘制视频帧到canvas画布 const ctx=canvas.getContext('2d') ctx.drawImage(dp.video,0,0,canvas.width,canvas.height) const imageData=ctx.getImageData(0,0,canvas.width,canvas.height) //2.人物分割 const segmentation =await segmenter.segmentPeople(imageData) //3.生成二进制掩码 const foregroundColor = { r: 0, g: 0, b: 0, a: 0 } const backgroundColor = { r: 0, g: 0, b: 0, a: 255 } const mask=await toBinaryMask(segmentation,foregroundColor,backgroundColor) //4.清除画布并绘制掩码 ctx.clearRect(0,0,canvas.width,canvas.height) ctx.drawImage(await segmentation[0].mask.toCanvasImageSource(),0,0,canvas.width,canvas.height) //5.设置混合模式 ctx.globalCompositeOperation="source-out"; //6.反向填充黑色 ctx.fillRect(0,0,canvas.width,canvas.height) //7.保存mask图片 const dataUrl=canvas.toDataURL('image/png',0) //8.可以选择下载这些png图片 const link=document.createElement('a') link.href=dataUrl link.download='mask_image.png' document.body.appendChild(link) link.click() document.body.removeChild(link)}）不知道如何选中dplayer.danmaku的弹幕对象，然后对弹幕进行蒙版处理，求指点！附一张处理得到的mask图片：
