HarmonyOS 鸿蒙Next如何做视频压缩

提供一个测试的demo：

import { photoAccessHelper } from '@kit.MediaLibraryKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { CompressorResponseCode, CompressQuality, VideoCompressor} from "[@ohos](/user/ohos)/videocompressor"
import { hash } from '@kit.CoreFileKit';
@Entry
@Component
struct Index {
@State message: string = ‘Hello World’;
@State md5Array:string[] = []
selectVideo(){
const photoViewPicker = new photoAccessHelper.PhotoViewPicker();
const photoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
photoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.VIDEO_TYPE
photoSelectOptions.maxSelectNumber = 1
photoViewPicker.select(photoSelectOptions).then(async (photoSelectResult: photoAccessHelper.PhotoSelectResult) => {
let uris = photoSelectResult.photoUris || []
if (uris.length){
let path = uris[0]
console.log(‘path’,path)
let videoCompressor = new VideoCompressor();
videoCompressor.compressVideo(getContext(),path,CompressQuality.COMPRESS_QUALITY_MEDIUM).then((data) => {
if (data.code == CompressorResponseCode.SUCCESS) {
hash.hash(data.outputPath,‘md5’).then(md5=>{
this.md5Array.push(md5.toLowerCase())
console.log(‘md5’,md5.toLowerCase())
})
}
}).catch((err:BusinessError) => {
    })
  }
  console.log(<span class="hljs-string">'photoSelectResult'</span>,<span class="hljs-built_in">JSON</span>.stringify(photoSelectResult))
}).catch((err: BusinessError) =&gt; {

})
}
build() {
RelativeContainer() {
Column(){
Button(‘选择视频压缩’)
.onClick(()=>{
this.selectVideo()
})
ForEach(this.md5Array, (item: string, index: number) => {
Text(第${index+<span class="hljs-number">1</span>}次:${item})
})
}
.alignItems(HorizontalAlign.Center)
.justifyContent(FlexAlign.Center)
.height(‘100%’)
.width(‘100%’)
}
.height(‘100%’)
.width(‘100%’)
}
}