IOS 上传视频并压缩MP4格式

#import 
#import 





//上传附件
- (void)btnUploadClick
{
    UIActionSheet *as=[[UIActionSheet alloc]initWithTitle:@"上传附件" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"马上照一张或录一段视频" otherButtonTitles:@"从相册中选择照片或视频", nil ];
    as.actionSheetStyle=2;
    [as showInView:[[[UIApplication sharedApplication] delegate] window]];
}




//MARK:用户头像上传的方法
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    DLog(@"%ld",buttonIndex);
    switch (buttonIndex) {
        case 0:
        {
            UIImagePickerController *imgPicker=[[UIImagePickerController alloc]init];
            [imgPicker setSourceType:UIImagePickerControllerSourceTypeCamera];
            imgPicker.delegate = self;
            [imgPicker setAllowsEditing:YES];
            imgPicker.navigationBar.barTintColor = [UIColor MyNavigationbarColorSelection];imgPicker.navigationBar.barTintColor = [UIColor MyNavigationbarColorSelection];
            NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有两个分别是@"public.image",@"public.movie"
//            imgPicker.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//设置媒体类型为public.movie
            imgPicker.mediaTypes = availableMedia;
            [self presentViewController:imgPicker animated:YES completion:^{
            }];
        }
            //照一张
            break;
        case 1:
            //搞一张
        {
            UIImagePickerController *imgPicker=[[UIImagePickerController alloc]init];
            [imgPicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
            [imgPicker setDelegate:self];
            [imgPicker setAllowsEditing:YES];
            imgPicker.navigationBar.barTintColor = [UIColor MyNavigationbarColorSelection];
             NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有两个分别是@"public.image",@"public.movie"
//            imgPicker.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//设置媒体类型为public.movie
            imgPicker.mediaTypes = availableMedia;
            imgPicker.videoMaximumDuration = 60.0f;//60秒
            [self presentViewController:imgPicker animated:YES completion:^{
            }];
            break;
        }
        default:
            break;
    }
}

#pragma mark UIImagePickerControllerDelegate
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    DLog(@"点击了取消");
    [picker dismissViewControllerAnimated:YES completion:nil];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    DLog(@"------>%@",info);
    //模态消失
    [picker dismissViewControllerAnimated:YES completion:nil];
    
    if ([[NSString stringWithFormat:@"%@",[info objectForKey:@"UIImagePickerControllerMediaType"]] isEqualToString:@"public.image"]) {//图片
        UIImage *image;
        if (picker.allowsEditing)
        {
            image = [info objectForKey:UIImagePickerControllerEditedImage];
            
        }else
        {
            image = [info objectForKey:UIImagePickerControllerOriginalImage];
        }
        //    NSString *aPath = [NSString stringWithFormat:@"%@/Documents/%@.jpg",NSHomeDirectory(),@"test"];//生成路径
        NSData *imgData = UIImageJPEGRepresentation(image, 0.1);// 压缩图片 参数0-1 1最大 0无限接近 最小15k左右
        //    [imgData writeToFile:aPath atomically:YES];
        
        [SVProgressHUD showWithStatus:@"上传图片中"];
        [Manage requestToUploadAttachmentsDataWith:^(NSDictionary *base) {
            if ([base[@"errno"] intValue] == 200) {
                [SVProgressHUD showInfoWithStatus:[base objectForKey:@"err"]];
            }else{
                [SVProgressHUD showInfoWithStatus:[base objectForKey:@"err"]];
            }
        } taskId:@"" fileImg:imgData URL:nil enclosureType:@"demand" fileVideo:nil];
        
    }else if ([[NSString stringWithFormat:@"%@",[info objectForKey:@"UIImagePickerControllerMediaType"]] isEqualToString:@"public.movie"]){//视频
        
        
        NSURL *sourceURL = [info objectForKey:UIImagePickerControllerMediaURL];
        DLog(@"%@",[NSString stringWithFormat:@"%f s", [self getVideoLength:sourceURL]]);
        DLog(@"%@", [NSString stringWithFormat:@"%.2f kb", [self getFileSize:[sourceURL path]]]);
        NSURL *newVideoUrl ; //一般.mp4
        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]]]] ;//这个是保存在app自己的沙盒路径里，后面可以选择是否在上传后删除掉。我建议删除掉，免得占空间。
        [picker dismissViewControllerAnimated:YES completion:nil];
        [self convertVideoQuailtyWithInputURL:sourceURL outputURL:newVideoUrl completeHandler:nil];
    
    }
}

//此方法可以获取文件的大小，返回的是单位是KB。
- (CGFloat) getFileSize:(NSString *)path
{
    NSLog(@"%@",path);
    NSFileManager *fileManager = [NSFileManager defaultManager];
    float filesize = -1.0;
    if ([fileManager fileExistsAtPath:path]) {
        NSDictionary *fileDic = [fileManager attributesOfItemAtPath:path error:nil];//获取文件的属性
        unsigned long long size = [[fileDic objectForKey:NSFileSize] longLongValue];
        filesize = 1.0*size/1024;
    }else{
        DLog(@"找不到文件");
    }
    return filesize;
}

//此方法可以获取视频文件的时长。
- (CGFloat) getVideoLength:(NSURL *)URL
{
    
    AVURLAsset *avUrl = [AVURLAsset assetWithURL:URL];
    CMTime time = [avUrl duration];
    int second = ceil(time.value/time.timescale);
    return second;
}

- (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];
    //  NSLog(resultPath);
    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");
                 NSLog(@"%@",[NSString stringWithFormat:@"%f s", [self getVideoLength:outputURL]]);
                 NSLog(@"%@", [NSString stringWithFormat:@"%.2f kb", [self getFileSize:[outputURL path]]]);
                 
                 //UISaveVideoAtPathToSavedPhotosAlbum([outputURL path], self, nil, NULL);//这个是保存到手机相册
                 
                 [self alertUploadVideo:outputURL];
                 break;
             case AVAssetExportSessionStatusFailed:
                 NSLog(@"AVAssetExportSessionStatusFailed");
                 break;
         }
         
     }];
}


-(void)alertUploadVideo:(NSURL*)URL{
    CGFloat size = [self getFileSize:[URL path]];
    NSString *message;
    NSString *sizeString;
    CGFloat sizemb= size/1024;
    if(size<=1024){
        sizeString = [NSString stringWithFormat:@"%.2fKB",size];
    }else{
        sizeString = [NSString stringWithFormat:@"%.2fMB",sizemb];
    }
    
    if(sizemb<2){
        [self uploadVideo:URL];
    }
    else if(sizemb<=5){
        message = [NSString stringWithFormat:@"视频%@，大于2MB会有点慢，确定上传吗？", sizeString];
        UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil
                                                                                  message: message
                                                                           preferredStyle:UIAlertControllerStyleAlert];
        
        
        [alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
            [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//取消之后就删除，以免占用手机硬盘空间（沙盒）
        }]];
        [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
            [self uploadVideo:URL];
        }]];
        [self presentViewController:alertController animated:YES completion:nil];
        
        
    }/*else if(sizemb>5){
        message = [NSString stringWithFormat:@"视频%@，超过5MB，不能上传，抱歉。", sizeString];
        UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil
                                                                                  message: message
                                                                           preferredStyle:UIAlertControllerStyleAlert];
        
        [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
            [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//取消之后就删除，以免占用手机硬盘空间
            
        }]];
        [self presentViewController:alertController animated:YES completion:nil];
        
    }
    */
    
}

-(void)uploadVideo:(NSURL*)URL{
    
    
    NSData *data = [NSData dataWithContentsOfURL:URL];
    
    [SVProgressHUD showWithStatus:@"上传视频中"];
    [Manage requestToUploadAttachmentsDataWith:^(NSDictionary *base) {
        if ([base[@"errno"] intValue] == 200) {
            [SVProgressHUD showInfoWithStatus:[base objectForKey:@"err"]];
        }else{
            [SVProgressHUD showInfoWithStatus:[base objectForKey:@"err"]];
        }
    } taskId:self.taskId fileImg:nil URL:URL enclosureType:self.taskId fileVideo:data];
}