const session = this.session = wx.createVKSession({
        track: {
          face: { mode: 1 }
        },
        cameraPosition: 1,
        version: 'v1',
        gl: this.gl
      })
  }

const frame = this.frame = session.getVKFrame(this.canvas.width, this.canvas.height)
const {yTexture, uvTexture} = frame.getCameraTexture(gl, 'yuv')
console.log('session.status', session.status) //输出0