iOS视频录制（或选择）压缩及上传功能（整理）

//选择本地视频 - (void)choosevideo {  UIImagePickerController *ipc = [[UIImagePickerController alloc] init];  ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//sourcetype有三种分别是camera，photoLibrary和photoAlbum  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"  ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//设置媒体类型为public.movie  [self presentViewController:ipc animated:YES completion:nil];  ipc.delegate = self;//设置委托 } //录制视频 - (void)startvideo {  UIImagePickerController *ipc = [[UIImagePickerController alloc] init];  ipc.sourceType = UIImagePickerControllerSourceTypeCamera;//sourcetype有三种分别是camera，photoLibrary和photoAlbum  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"  ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//设置媒体类型为public.movie  [self presentViewController:ipc animated:YES completion:nil];  ipc.videoMaximumDuration = 30.0f;//30秒  ipc.delegate = self;//设置委托 } 

- (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{   NSLog(@"找不到文件");  }  return filesize; }//此方法可以获取文件的大小，返回的是单位是KB。 - (CGFloat) getVideoLength:(NSURL *)URL {  AVURLAsset *avUrl = [AVURLAsset assetWithURL:URL];  CMTime time = [avUrl duration];  int second = ceil(time.value/time.timescale);  return second; }//此方法可以获取视频文件的时长。

//完成视频录制，并压缩后显示大小、时长 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {  NSURL *sourceURL = [info objectForKey:UIImagePickerControllerMediaURL];  NSLog(@"%@",[NSString stringWithFormat:@"%f s", [self getVideoLength:sourceURL]]);  NSLog(@"%@", [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]; } - (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) {    [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil];    [[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) {    [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil];    [[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{  //[MyTools showTipsWithNoDisappear:nil message:@"正在上传..."];  NSData *data = [NSData dataWithContentsOfURL:URL];  MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"www.ylhuakai.com" customHeaderFields:nil];  NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];  NSString *updateURL;  updateURL = @"/alflower/Data/sendupdate";  [dic setValue:[NSString stringWithFormat:@"%@",User_id] forKey:@"openid"];  [dic setValue:[NSString stringWithFormat:@"%@",[self.web objectForKey:@"web_id"]] forKey:@"web_id"];  [dic setValue:[NSString stringWithFormat:@"%i",insertnumber] forKey:@"number"];  [dic setValue:[NSString stringWithFormat:@"%i",insertType] forKey:@"type"];  MKNetworkOperation *op = [engine operationWithPath:updateURL params:dic httpMethod:@"POST"];  [op addData:data forKey:@"video" mimeType:@"video/mpeg" fileName:@"aa.mp4"];  [op addCompletionHandler:^(MKNetworkOperation *operation) {   NSLog(@"[operation responseData]-->>%@", [operation responseString]);   NSData *data = [operation responseData];   NSDictionary *resweiboDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];   NSString *status = [[resweiboDict objectForKey:@"status"]stringValue];   NSLog(@"addfriendlist status is %@", status);   NSString *info = [resweiboDict objectForKey:@"info"];   NSLog(@"addfriendlist info is %@", info);   // [MyTools showTipsWithView:nil message:info];   // [SVProgressHUD showErrorWithStatus:info];   if ([status isEqualToString:@"1"])   {    [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil];    [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//上传之后就删除，以免占用手机硬盘空间;   }else   {    //[SVProgressHUD showErrorWithStatus:dic[@"info"]];   }   // [[NSNotificationCenter defaultCenter] postNotificationName:@"StoryData" object:nil userInfo:nil];  }errorHandler:^(MKNetworkOperation *errorOp, NSError* err) {   NSLog(@"MKNetwork request error : %@", [err localizedDescription]);  }];  [engine enqueueOperation:op]; }