iOS UIImagePickerController拍摄、压缩、上传视频

一、使用UIImagePickerController进行拍摄设置

  // 一般情况下用这个判断 该设备支不支持拍照
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        [MBProgressHUD showError:@"该设备不支持拍照"];
        return ;
    }
    //实现摄像
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    //指定使用模式
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    //设置相机支持的类型，拍照和录像
    picker.mediaTypes =  [[NSArray alloc] initWithObjects:(NSString*)kUTTypeMovie,nil];
    //能否编辑
    picker.allowsEditing = NO;
    //设置闪光灯模式
    picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
    // 视频的最大录制时长
    picker.videoMaximumDuration = 30.f;
    // 设置视频的质量
    picker.videoQuality = UIImagePickerControllerQualityTypeMedium;
    //相机的模式 拍照/摄像
    picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
    //协议
    picker.delegate = self;
    [self presentViewController:picker animated:YES completion:nil];
    

二、获取拍摄完成后的视频

//视频完成后方法
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    // 拿到视频地址
    NSURL *sourceURL = [info objectForKey:UIImagePickerControllerMediaURL];
    // 配置输出的视频文件,保存在app自己的沙盒路径里，在上传后删除掉。
    NSURL *newVideoUrl;
    NSDateFormatter *formater = [[NSDateFormatter alloc] init];
   
    //用时间给文件全名，以免重复，在测试的时候其实可以判断文件是否存在若存在，则删除，重新生成文件即可
    [formater setDateFormat:@"yyyy-MM-dd-HH:mm:ss"];
    newVideoUrl = [NSURL fileURLWithPath:[NSHomeDirectory() stringByAppendingFormat:@"/Documents/output-%@.mp4", [formater stringFromDate:[NSDate date]]]] ;
    [picker dismissViewControllerAnimated:YES completion:nil];
    
    // 处理视频 压缩视频
    [self convertVideoQuailtyWithInputURL:sourceURL outputURL:newVideoUrl completeHandler:nil];
    
    
}

三、压缩视频

// 视频压缩转码处理
- (void)convertVideoQuailtyWithInputURL:(NSURL*)inputURL
                              outputURL:(NSURL*)outputURL
                        completeHandler:(void (^)(AVAssetExportSession*))handler {
                        
    AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:inputURL options:nil];
    AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality];
    exportSession.outputURL = outputURL;
    exportSession.outputFileType = AVFileTypeMPEG4;
    exportSession.shouldOptimizeForNetworkUse= YES;
    [exportSession exportAsynchronouslyWithCompletionHandler:^(void) {
        switch (exportSession.status) {
            case AVAssetExportSessionStatusCancelled:
                NSLog(@"AVAssetExportSessionStatusCancelled");
                break;
            case AVAssetExportSessionStatusUnknown:
                NSLog(@"AVAssetExportSessionStatusUnknown");
                break;
            case AVAssetExportSessionStatusWaiting:
                NSLog(@"AVAssetExportSessionStatusWaiting");
                break;
            case AVAssetExportSessionStatusExporting:
                NSLog(@"AVAssetExportSessionStatusExporting");
                break;
            case AVAssetExportSessionStatusCompleted:
                NSLog(@"AVAssetExportSessionStatusCompleted");
                // 导出完成后再赋值
                NSLog(@"压缩成功");
                //视频路径
                self.outputURL = outputURL;
                //上传视频逻辑
                
                break;
            case AVAssetExportSessionStatusFailed:
                NSLog(@"AVAssetExportSessionStatusFailed");
                break;
        }
    }];
}

//获取视频缩略图
- (UIImage *)get_videoThumbImage:(NSURL *)videoURL
{
    NSDictionary *opts = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO] forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
    AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:videoURL options:opts];
    AVAssetImageGenerator *generator = [AVAssetImageGenerator assetImageGeneratorWithAsset:urlAsset];
    generator.appliesPreferredTrackTransform = YES;
    CMTime actualTime;
    NSError *error = nil;
    CGImageRef img = [generator copyCGImageAtTime:CMTimeMake(0, 600) actualTime:&actualTime error:&error];
    if (error) {
        return nil;
    }
    return [UIImage imageWithCGImage:img];
}

四、封装AFNetwoeking上传视频

+ (void)uploadingVideWithUrl:(NSString *)url filePath:(NSString *)filePath params:(NSDictionary *)params Success:(void(^)(NSDictionary *respDic))success failure:(void(^)(NSString *error))failure;
{
    AFHTTPSessionManager *manager = [[AFHTTPSessionManager manager]initWithBaseURL:[NSURL URLWithString:url]];
    
    //1.发送一个请求
    [manager POST:url parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        
        NSDateFormatter *formater = [[NSDateFormatter alloc] init];
        [formater setDateFormat:@"yyyy-MM-dd-HH:mm:ss"];
        //日期
        NSString * str = [formater stringFromDate:[NSDate date]];
        //文件名
        NSString * fileName = [NSString stringWithFormat:@"%@.mp4",str];
        //data
        NSData * fileData = [NSData dataWithContentsOfFile:filePath];
        //multipartFile 和后台定的名称
        [formData appendPartWithFileData:fileData name:@"multipartFile" fileName:fileName mimeType:@"video/quicktime"];
        
    
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        
        NSLog(@"%@",responseObject);
        
        if (success) {
            success (responseObject);
        }
        
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        //错误信息
        NSLog(@"%@",error);
        if (failure) {
            failure (error.localizedDescription);
        }
    }];
    
}