// 视频初次加载完成
   loadedmetadata(e) {
    console.log('视频初次加载完成', e)
    this.duration = e.detail.duration
    this.videoHeight = e.detail.height * (this.videoWidth / e.detail.width)
    this.draw()
   },
   draw() {
    const dpr = wx.getSystemInfoSync().pixelRatio
    wx.createSelectorQuery().select('#video').context(res => {
     console.log('select video', res)
     this.videoBox = res.context
     wx.createSelectorQuery().selectAll('#cvs1').node(res => {
      console.log('select canvas', res)
      const ctx = res[0].node
      const ctx1 = res[0].node.getContext('2d')
      res[0].node.width = this.videoWidth * dpr
      res[0].node.height = this.videoHeight * dpr
      this.canvasHeight = this.videoHeight + 'px'
      this.canvasWidth = this.videoWidth
      let videoContext = wx.createVideoContext('video')
      videoContext.seek(2)
      setTimeout(() => {
       ctx1.drawImage(this.videoBox, 0, 0, this.videoWidth * dpr, this
        .videoHeight *
        dpr);
       let imageSrc = ctx.toDataURL('image/png')
       this.imageSrc = imageSrc
       console.log('this.imageSrc', imageSrc)
      }, 1000)
     }).exec()
    }).exec()
   },

微信小程序，真机测试ios正常显示，只有安卓机型发生错误，base64全部解析出来中间全都是AAAAA 导致图片展示失败

这是ios的真机调试 显示正常，安卓的直接不展示，显示AAAAA

请问是不是canvas.todataurl() 微信小程序安卓端有兼容问题