iOS学习之向服务器上传视频的实践

在最近的项目中，涉及到视频上传，在网上找了下资料，这里整理下来希望对大家有帮助，这里简短谈下整个流程；

1. 创建保存该视频的文件夹

- (void)createVideoFolderIfNotExist{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *path = [paths objectAtIndex:0];
    NSString *folderPath = [path stringByAppendingPathComponent:videoFolders];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL isDir = NO;
    BOOL isDirExist = [fileManager fileExistsAtPath:folderPath isDirectory:&isDir];
    if(!(isDirExist && isDir)) {
        BOOL create = [fileManager createDirectoryAtPath:folderPath withIntermediateDirectories:YES attributes:nil error:nil];
        if(!create){
            NSLog(@"创建保存视频文件夹失败");
        }
    }
}

2. 视频录制完以后保存的视频

- (NSString *)getVideoSaveFilePathString{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *path = [paths objectAtIndex:0];
    path = [path stringByAppendingPathComponent:videoFolders];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    formatter.dateFormat = @"yyyyMMddHHmmss";
    NSString *nowTimeStr = [formatter stringFromDate:[NSDate dateWithTimeIntervalSinceNow:0]];
    NSString *fileName = [[path stringByAppendingPathComponent:nowTimeStr] stringByAppendingString:@".mov"];
    return fileName;
}

3. 根据以上两个方法,最后合成为 mp4

- (NSString *)getVideoMergeFilePathString{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *path = [paths objectAtIndex:0];
    path = [path stringByAppendingPathComponent:videoFolders];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    formatter.dateFormat = @"yyyyMMddHHmmss";
    NSString *nowTimeStr = [formatter stringFromDate:[NSDate dateWithTimeIntervalSinceNow:0]];
    NSString *fileName = [[path stringByAppendingPathComponent:nowTimeStr] stringByAppendingString:@"merge.mp4"];
    return fileName;
}

主要的代码

    //根据设备输出获得连接
    AVCaptureConnection *captureConnection=[self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeVideo];
    
    //根据连接取得设备输出的数据
    if (![self.captureMovieFileOutput isRecording]) {
//        shootBt.backgroundColor = UIColorFromRGB(0xfa5f66);
        //预览图层和视频方向保持一致
        captureConnection.videoOrientation=[self.captureVideoPreviewLayer connection].videoOrientation;
        [self.captureMovieFileOutput startRecordingToOutputFileURL:[NSURL fileURLWithPath:[self getVideoSaveFilePathString]] recordingDelegate:self];


＃视频压缩
 NSString *path = [self getVideoMergeFilePathString];
    NSURL *mergeFileURL = [NSURL fileURLWithPath:path];
    
    AVMutableVideoCompositionInstruction *mainInstruciton = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
    mainInstruciton.timeRange = CMTimeRangeMake(kCMTimeZero, totalDuration);
    mainInstruciton.layerInstructions = layerInstructionArray;
    AVMutableVideoComposition *mainCompositionInst = [AVMutableVideoComposition videoComposition];
    mainCompositionInst.instructions = @[mainInstruciton];
    mainCompositionInst.frameDuration = CMTimeMake(1, 100);
    mainCompositionInst.renderSize = CGSizeMake(renderW, renderW*preLayerHWRate);
    
    AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetMediumQuality];
    exporter.videoComposition = mainCompositionInst;
    exporter.outputURL = mergeFileURL;
    exporter.outputFileType = AVFileTypeMPEG4; //mp4
    exporter.shouldOptimizeForNetworkUse = YES;
 
    [exporter exportAsynchronouslyWithCompletionHandler:^{
        if ([exporter status] == AVAssetExportSessionStatusCompleted) {
            dispatch_async(dispatch_get_main_queue(), ^{

＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃  这里的二进制就是上传的东西了＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃               
                NSData *data = [NSData dataWithContentsOfURL:exporter.outputURL];
    }];

上传的方法

    NSString *imageStr = @"公司接口";
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    manager.requestSerializer = [AFHTTPRequestSerializer serializer];
    
    NSMutableDictionary *param = [NSMutableDictionary dictionary];
 
    [manager POST:imageStr parameters:param constructingBodyWithBlock:^(id formData) {
            /*
           此方法参数
           1. 要上传的[二进制数据]
           2. 对应网站上[upload.php中]处理文件的[字段"file"]
           3. 要保存在服务器上的[文件名]
           4. 上传文件的[mimeType]
            */
        
        [formData appendPartWithFileData:datas name:@"video" fileName:@"videosNames" mimeType:@"video/mp4"];
//        [formData appendPartWithFormData:datas name:@"video"];
        
        } success:^(AFHTTPRequestOperation *operation, id responseObject) {
         NSDictionary *cashDic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableLeaves error:nil];
 
            NSLog(@"%@",cashDic[@"remark"]);
            
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
            NSLog(@"faile ----->%@",error);
            
        }];

感谢：https://blog.csdn.net/whjay520/article/details/53440369