Flutter开发Mac桌面应用实现自动提取生成视频字幕文件

# Mac M1/M2 Arm 架构 CPU
CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go build -o video-srt-arm64 main.go
# Mac Amd 架构 CPU
CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o video-srt-amd64 main.go

// 目录名称
const String VIDEO_SRT = "video-srt";
class ZipRepository{
  static Future<void> unzip(String zipFile, String targetDir) async{
    final inputStream = InputFileStream(zipFile);
    final archive = ZipDecoder().decodeBuffer(inputStream);
    extractArchiveToDisk(archive, targetDir);
    return;
  }
  static Future<void> unzipVideoSrt() async{
    var workDirPath = await PathUtils.getWorkDirPath();
    // 创建工作目录下的 video-srt 目录
    var videoSrtFile = Directory("$workDirPath/$VIDEO_SRT");
    // 如果已经存在则不重复解压
    if(await videoSrtFile.exists()){
      return;
    }
    // 解压
    await unzip(VIDEO_SRT_ZIP_PATH, "$workDirPath");
    return;
  }
}

// 工作目录名称
const String WORK_DIR_NAME = "videoSrt";
class PathUtils{
  static String? workDirPath;
  static Future<String> getWorkDirPath() async{
    if(workDirPath != null){
      return workDirPath!;
    }
    // 获取 library 目录
    Directory tempDir = await getLibraryDirectory();
    var workDir = "${tempDir.path}/$WORK_DIR_NAME";
    var dir = Directory(workDir);
    if(! (await dir.exists())){
      await dir.create();
    }
    workDirPath = workDir;
    return workDir;
  }
}

#字幕相关设置
[srt]
#智能分段处理：true（开启） false（关闭）
intelligent_block=true
#阿里云Oss对象服务配置
#文档：https://help.aliyun.com/document_detail/31827.html?spm=a2c4g.11186623.6.582.4e7858a85Dr5pA
[aliyunOss]
# OSS 对外服务的访问域名
endpoint=
# 存储空间（Bucket）名称
bucketName=
# 存储空间（Bucket 域名）地址
bucketDomain=
accessKeyId=
accessKeySecret=
#阿里云语音识别配置
#文档：
[aliyunClound]
# 在管控台中创建的项目Appkey，项目的唯一标识
appKey=
accessKeyId=
accessKeySecret=

// 读取配置数据
static Future<ConfigModel> readIniData() async{
  var workDir = await PathUtils.getWorkDirPath();
  var iniPath = "$workDir/$VIDEO_SRT/$CONFIG_NAME";
  Completer<ConfigModel> completer = Completer();
  File(iniPath).readAsLines()
      .then((lines) => Config.fromStrings(lines))
      .then((Config config){
        var iniModel = ConfigModel();
        iniModel.intelligent_block = (config.get("srt", "intelligent_block") ?? "true").toLowerCase() == "true";
        iniModel.oss_endpoint = config.get("aliyunOss", "endpoint");
        iniModel.oss_bucketName = config.get("aliyunOss", "bucketName") ;
        iniModel.oss_bucketDomain = config.get("aliyunOss", "bucketDomain") ;
        iniModel.oss_accessKeyId = config.get("aliyunOss", "accessKeyId") ;
        iniModel.oss_accessKeySecret = config.get("aliyunOss", "accessKeySecret") ;
        iniModel.voice_appKey = config.get("aliyunClound", "appKey") ;
        iniModel.voice_accessKeyId = config.get("aliyunClound", "accessKeyId") ;
        iniModel.voice_accessKeySecret = config.get("aliyunClound", "accessKeySecret") ;
        iniModel.go_path = config.get("go", "goPath") ;
        completer.complete(iniModel);
  });
  return completer.future;
}
// 写配置数据
static Future<void> writeIniData(ConfigModel iniModel) async{
  Config config = Config();
  config.addSection("srt");
  config.set("srt", "intelligent_block", iniModel.intelligent_block.toString());
  config.addSection("aliyunOss");
  config.set("aliyunOss", "endpoint", iniModel.oss_endpoint ?? "");
  config.set("aliyunOss", "bucketName", iniModel.oss_bucketName ?? "");
  config.set("aliyunOss", "bucketDomain", iniModel.oss_bucketDomain ?? "");
  config.set("aliyunOss", "accessKeyId", iniModel.oss_accessKeyId ?? "");
  config.set("aliyunOss", "accessKeySecret", iniModel.oss_accessKeySecret ?? "");
  config.addSection("aliyunClound");
  config.set("aliyunClound", "appKey", iniModel.voice_appKey ?? "");
  config.set("aliyunClound", "accessKeyId", iniModel.voice_accessKeyId ?? "");
  config.set("aliyunClound", "accessKeySecret", iniModel.voice_accessKeySecret ?? "");
  config.addSection("go");
  config.set("go", "goPath", iniModel.go_path ?? "");
  var workDir = await PathUtils.getWorkDirPath();
  var iniPath = "$workDir/$VIDEO_SRT/$CONFIG_NAME";
  await File(iniPath).writeAsString(config.toString());
  return;
}

static Future<void> runVideoSrt(String targetFilePath, Function(String) callback) async{
  if(targetFilePath.isEmpty){
    return;
  }
  // 获取工作目录
  var workDir = await PathUtils.getWorkDirPath();
  var controller = ShellLinesController();
  var shell = Shell(stdout: controller.sink, verbose: false);
  // 切换路径到工作目录下的 video-srt 下
  shell = shell.pushd("$workDir/$VIDEO_SRT");
  try {
    // 给 ffmpeg 添加执行权限
    await shell.run("chmod +x ffmpeg");
    // 给 video-srt 添加执行权限
    await shell.run("chmod +x video-srt");
  } on ShellException catch (_) {
    // We might get a shell exception
  }
  // 监听执行结果
  controller.stream.listen((event) {
    callback(event);
  });
  try {
    // 执行视频提取字幕命令
    await shell.run("./video-srt $targetFilePath");
  } on ShellException catch (_) {
    // We might get a shell exception
  }
  shell = shell.popd();
  return;
}

class MainView extends StatefulWidget {
  const MainView({super.key});
  @override
  State<MainView> createState() => _MainViewState();
}
class _MainViewState extends State<MainView> {
  int _pageIndex = 0;
  @override
  Widget build(BuildContext context) {
    return PlatformMenuBar(
      menus: const [
        PlatformMenu(
          label: 'VideoSrtMacos',
          menus: [
            // 状态栏左上角退出按钮
            PlatformProvidedMenuItem(
              type: PlatformProvidedMenuItemType.quit,
            ),
          ],
        ),
      ],
      child:  MacosWindow(
        sidebar: Sidebar(
          minWidth: 200,
          builder: (context, scrollController) => SidebarItems(
            currentIndex: _pageIndex,
            onChanged: (index) {
              setState(() => _pageIndex = index);
            },
            items: const [
              SidebarItem(leading: MacosIcon(CupertinoIcons.home),label: Text('首页'),),
              SidebarItem(leading: MacosIcon(CupertinoIcons.settings),label: Text('配置'),),
              SidebarItem(leading: MacosIcon(CupertinoIcons.helm),label: Text('帮助'),),
              SidebarItem(leading: MacosIcon(CupertinoIcons.info),label: Text('关于'),),
            ],
          ),
        ),
        child: IndexedStack(
          index: _pageIndex,
          children: const [
            // 主页
            HomePage(),
            // 配置页面
            ConfigView(),
            HelpView(),
            AboutView()
          ],
        ),
      ),
    );
  }
}