HarmonyOS 鸿蒙Next OpenHarmony-SIG/fluttertpc_video_thumbnail 获取本地视频的 cover，返回异常

HarmonyOS 鸿蒙Next OpenHarmony-SIG/fluttertpc_video_thumbnail 获取本地视频的 cover，返回异常 三方库版本：https://gitee.com/openharmony-sig/fluttertpc_video_thumbnail.git 最新提交

相册选择视频或者相机拍摄视频，获取到视频文件的 path，使用 File 操作复制文件到DocumentDirectory目录，之后使用fluttertpc_video_thumbnail这个三方库读取这个文件的封面，但是什么都没返回，查看DevEco 的 log 也没有任何输出

int nowTime = DateTime.now().millisecondsSinceEpoch;
File videoFile = File(path);
String fileExtension = p.extension(path);
debugPrint("fileExtension:$fileExtension");
String targetVideoPath = "${Constant.ohosCacheDirectory}/${nowTime}_hotspot_video_temp_original$fileExtension";
String targetVideoPathThumbnail = "${Constant.ohosDocumentDirectory}/${nowTime}_hotspot_video_thumbnail_temp_original.png";
// 复制图片到到持久化文件夹下
videoFile.copy(targetVideoPath);
debugPrint("添加的热点视频复制到持久化目录: targetImagePath:$targetVideoPath");
int timestampMillis = DateTime.now().millisecondsSinceEpoch;

final String? videoCoverPath = await VideoThumbnail.thumbnailFile(
  video: targetVideoPath,
  thumbnailPath: targetVideoPathThumbnail,
  imageFormat: ImageFormat.PNG,
  maxHeight: 100,
  maxWidth: 100,
);
//说明，执行这个VideoThumbnail.thumbnailFile异步方法之后，下面代码就不跑了，没有任何输出
if (videoCoverPath == null) {
  if (mounted) {
    CommonUtils.showHUDDialog(ShowHUDDialogType.error, "获取视频封面失败", context);
  }
  return;
}
debugPrint("general videoCoverPath is:$videoCoverPath");

更多关于HarmonyOS 鸿蒙Next OpenHarmony-SIG/fluttertpc_video_thumbnail 获取本地视频的 cover，返回异常的实战教程也可以访问 https://www.itying.com/category-92-b0.html

2 回复 
import camera from '@ohos.multimedia.camera';
import common from '@ohos.app.ability.common';
import { BusinessError } from '@ohos.base';
import fileuri from '@ohos.file.fileuri';
import fs from '@ohos.file.fs';
import photoAccessHelper from '@ohos.file.photoAccessHelper';
import { picker } from '@kit.CoreFileKit';
import { dataSharePredicates } from '@kit.ArkData';

let context = getContext(this) as common.Context;

class CameraPosition {
  cameraPosition: camera.CameraPosition
  saveUri: string

  constructor(cameraPosition: camera.CameraPosition, saveUri: string) {
    this.cameraPosition = cameraPosition
    this.saveUri = saveUri
  }
}

let pathDir = getContext().filesDir;
//沙箱路径地址
console.log('保存路径为' + pathDir)
let filePath = pathDir + '/test.mp4'
fs.createRandomAccessFileSync(filePath, fs.OpenMode.CREATE);
let uri = fileuri.getUriFromPath(filePath);

async function picture() {
  let PhotoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
  PhotoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
  PhotoSelectOptions.maxSelectNumber = 1;
  let photoPicker = new photoAccessHelper.PhotoViewPicker();
  photoPicker.select().then((PhotoSelectResult: photoAccessHelper.PhotoSelectResult) => {
    let photouri: Array<string> = PhotoSelectResult.photoUris
    let file = fs.openSync(photouri[0], fs.OpenMode.READ_ONLY)
    let file2 = fs.openSync(pathDir+'/test.mp4', fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)
    fs.copyFileSync(file.fd, file2.fd)
    fs.closeSync(file);
    fs.closeSync(file2);
  })
}

@Entry
@Component
export struct Index {
  @State message: string = 'Hello World';
  private appContext: common.Context = getContext(this);

  saveFile(){
    try {
      let documentSaveOptions = new picker.DocumentSaveOptions();
      documentSaveOptions.newFileNames = ['test.mp4'];
      let documentPicker = new picker.DocumentViewPicker();
      documentPicker.save(documentSaveOptions).then((documentSaveResult: Array<string>) => {
        let uri = documentSaveResult[0];
        let sanFile = fs.openSync(filePath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)
        let pubFile = fs.openSync(uri, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)
        fs.copyFileSync(sanFile.fd, pubFile.fd)
        fs.close(sanFile)
        fs.close(pubFile)
        console.info('DocumentViewPicker.save successfully, documentSaveResult uri: ' + JSON.stringify(documentSaveResult));
      }).catch((err: BusinessError) => {
        console.error('DocumentViewPicker.save failed with err: ' + JSON.stringify(err));
      });
    } catch (error) {
      let err: BusinessError = error as BusinessError;
      console.error('DocumentViewPicker failed with err: ' + JSON.stringify(err));
    }
  }
  build() {
    Column() {
      Button('选择并保存').onClick(() => {
        picture()
      })
      Button('保存documents')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
        .onClick(()=>{
          this.saveFile();
        })
    }
  }
}

更多关于HarmonyOS 鸿蒙Next OpenHarmony-SIG/fluttertpc_video_thumbnail 获取本地视频的 cover，返回异常的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


针对帖子标题中提到的问题“HarmonyOS 鸿蒙Next OpenHarmony-SIG/fluttertpc_video_thumbnail 获取本地视频的 cover，返回异常”，以下是根据要求提供的专业回答：

在HarmonyOS鸿蒙系统中，若使用OpenHarmony的SIG（Special Interest Group）组件fluttertpc_video_thumbnail时遇到获取本地视频封面返回异常的情况，可能的原因及解决方案包括：

  1. 权限问题：确保应用已正确申请并获取了访问本地存储的权限。检查AndroidManifest.xml或config.json中的权限声明。

  2. 路径问题：验证视频文件的路径是否正确，确保文件存在且应用有权限访问该路径。

  3. 组件兼容性：检查fluttertpc_video_thumbnail组件是否与当前使用的HarmonyOS版本兼容。可查阅相关文档或更新组件至最新版本。

  4. 异常处理：在代码中添加异常捕获逻辑，打印或记录异常信息，以便更准确地定位问题。

  5. 资源限制：检查系统资源是否充足，如内存、存储空间等，避免因资源不足导致处理失败。

如果问题依旧没法解决请联系官网客服，官网地址是：https://www.itying.com/category-93-b0.html，

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