上传文件到OBS时，对图片进行压缩后再上传

lib/data/repositories/message/upload_file.dart

@@ -7,6 +7,7 @@ import 'package:appframe/config/locator.dart';
 import 'package:appframe/services/api_service.dart';
 import 'package:appframe/services/api_service.dart';
 import 'package:appframe/services/dispatcher.dart';
 import 'package:appframe/services/dispatcher.dart';
 import 'package:appframe/utils/file_type_util.dart';
 import 'package:appframe/utils/file_type_util.dart';
+import 'package:appframe/utils/image_util.dart';
 import 'package:appframe/utils/video_util.dart';
 import 'package:appframe/utils/video_util.dart';
 import 'package:dio/dio.dart';
 import 'package:dio/dio.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/foundation.dart';
@@ -77,7 +78,7 @@ class UploadFileHandler extends MessageHandler {
     /// 非 mp4 格式的视频文件需先转码
     /// 非 mp4 格式的视频文件需先转码
     ///
     ///
     String? mimeType = await FileTypeUtil.getMimeType(file);
     String? mimeType = await FileTypeUtil.getMimeType(file);
-    if (mimeType?.startsWith('video/') ?? false) {
+    if (mimeType?.toLowerCase().startsWith('video/') ?? false) {
       final inputPath = filePath;
       final inputPath = filePath;
       final tempDir = await getTemporaryDirectory();
       final tempDir = await getTemporaryDirectory();
       final outputPath = '${tempDir.path}/${Uuid().v4()}.mp4';
       final outputPath = '${tempDir.path}/${Uuid().v4()}.mp4';
@@ -93,6 +94,22 @@ class UploadFileHandler extends MessageHandler {
 
 
       file = File(outputPath);
       file = File(outputPath);
       fileSize = file.lengthSync();
       fileSize = file.lengthSync();
+    } else if (mimeType?.toLowerCase().startsWith('image/') ?? false) { // 对于图片文件，进行压缩
+      // 对于图片文件，进行压缩
+      final inputPath = filePath;
+      final tempDir = await getTemporaryDirectory();
+      final outputPath = '${tempDir.path}/${Uuid().v4()}.jpg';
+
+      var startTime = DateTime.now();
+      final success = await ImageUtil.compressImage(inputPath, outputPath, maxWidth: 1920, quality: 18);
+      var endTime = DateTime.now();
+      print('====================>图片压缩耗时：${endTime.millisecondsSinceEpoch - startTime.millisecondsSinceEpoch} 毫秒');
+
+      if (success) {
+        file = File(outputPath);
+        fileSize = file.lengthSync();
+        print('====================>图片压缩后大小：$fileSize 字节');
+      }
     }
     }
 
 
     /// 2
     /// 2

lib/utils/file_type_util.dart

@@ -5,12 +5,12 @@ import 'package:mime/mime.dart';
 class FileTypeUtil {
 class FileTypeUtil {
   static Future<bool> isImage(File file) async {
   static Future<bool> isImage(File file) async {
     var mimeType = await getMimeType(file);
     var mimeType = await getMimeType(file);
-    return mimeType?.startsWith('image/') ?? false;
+    return mimeType?.toLowerCase().startsWith('image/') ?? false;
   }
   }
 
 
   static Future<bool> isVideo(File file) async {
   static Future<bool> isVideo(File file) async {
     var mimeType = await getMimeType(file);
     var mimeType = await getMimeType(file);
-    return mimeType?.startsWith('video/') ?? false;
+    return mimeType?.toLowerCase().startsWith('video/') ?? false;
   }
   }
 
 
   static Future<String?> getMimeType(File file) async {
   static Future<String?> getMimeType(File file) async {

lib/utils/image_util.dart

@@ -49,4 +49,44 @@ class ImageUtil {
       return null;
       return null;
     }
     }
   }
   }
+
+  /// 使用 FFmpeg 压缩图片
+  ///
+  /// [inputPath] 原始图片路径
+  /// [outputPath] 压缩后图片输出路径
+  /// [maxWidth] 最大宽度，超过此宽度将等比缩放，默认1920
+  /// [quality] JPEG 输出质量 (1-31，数值越小质量越高)，默认18
+  /// 返回是否压缩成功
+  static Future<bool> compressImage(String inputPath, String outputPath, {int maxWidth = 1920, int quality = 18}) async {
+    try {
+      // 检查源文件是否存在
+      final imageFile = File(inputPath);
+      if (!await imageFile.exists()) {
+        print('源图片文件不存在: $inputPath');
+        return false;
+      }
+
+      // 构建 FFmpeg 命令行参数
+      String cmd = '-i "$inputPath" ' // 指定输入文件路径
+          '-vf "scale=min($maxWidth\\,iw):-1:flags=lanczos" ' // 等比缩放，宽度不超过maxWidth，使用Lanczos算法
+          '-q:v $quality ' // 设置JPEG输出质量
+          '-y ' // 覆盖已存在的输出文件
+          '"$outputPath"'; // 指定输出文件路径
+
+      // 执行 FFmpeg 命令
+      final session = await FFmpegKit.execute(cmd);
+      final returnCode = await session.getReturnCode();
+
+      // 检查执行结果
+      if (ReturnCode.isSuccess(returnCode)) {
+        return true;
+      } else {
+        print('图片压缩失败: ${await session.getFailStackTrace()}');
+        return false;
+      }
+    } catch (e) {
+      print('图片压缩出错: $e');
+      return false;
+    }
+  }
 }
 }