iOS視頻錄制（或選擇）壓縮及上傳功能（整理）

發布時間：2020-09-01 18:58:02 來源：腳本之家閱讀：374 作者：VKOOY 欄目：移動開發

最新做的一個功能涉及到了視頻的錄制、壓縮及上傳。根據網上諸多大神的經驗，終于算是調通了，但也發現了一些問題，所以把我的經驗分享一下。

首先，肯定是調用一下系統的相機或相冊

代碼很基本：

//選擇本地視頻 
- (void)choosevideo 
{ 
 UIImagePickerController *ipc = [[UIImagePickerController alloc] init]; 
 ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//sourcetype有三種分別是camera，photoLibrary和photoAlbum 
 NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有兩個分別是@"public.image",@"public.movie" 
 ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//設置媒體類型為public.movie 
 [self presentViewController:ipc animated:YES completion:nil]; 
 ipc.delegate = self;//設置委托 
} 
//錄制視頻 
- (void)startvideo 
{ 
 UIImagePickerController *ipc = [[UIImagePickerController alloc] init]; 
 ipc.sourceType = UIImagePickerControllerSourceTypeCamera;//sourcetype有三種分別是camera，photoLibrary和photoAlbum 
 NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有兩個分別是@"public.image",@"public.movie" 
 ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//設置媒體類型為public.movie 
 [self presentViewController:ipc animated:YES completion:nil]; 
 ipc.videoMaximumDuration = 30.0f;//30秒 
 ipc.delegate = self;//設置委托 
}

iOS錄制的視頻格式是mov的，在Android和Pc上都不太好支持，所以要轉換為MP4格式的，而且壓縮一下，畢竟我們上傳的都是小視頻，不用特別清楚

為了反饋的清楚，先放兩個小代碼來獲取視頻的時長和大小，也是在網上找的，稍微改了一下。

- (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];//獲取文件的屬性 
  unsigned long long size = [[fileDic objectForKey:NSFileSize] longLongValue]; 
  filesize = 1.0*size/1024; 
 }else{ 
  NSLog(@"找不到文件"); 
 } 
 return filesize; 
}//此方法可以獲取文件的大小，返回的是單位是KB。 
- (CGFloat) getVideoLength:(NSURL *)URL 
{ 
 AVURLAsset *avUrl = [AVURLAsset assetWithURL:URL]; 
 CMTime time = [avUrl duration]; 
 int second = ceil(time.value/time.timescale); 
 return second; 
}//此方法可以獲取視頻文件的時長。

接收并壓縮

//完成視頻錄制，并壓縮后顯示大小、時長 
- (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];//用時間給文件全名，以免重復，在測試的時候其實可以判斷文件是否存在若存在，則刪除，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]]]] ;//這個是保存在app自己的沙盒路徑里，后面可以選擇是否在上傳后刪除掉。我建議刪除掉，免得占空間。 
 [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);//這個是保存到手機相冊 
      [self alertUploadVideo:outputURL]; 
      break; 
     case AVAssetExportSessionStatusFailed: 
      NSLog(@"AVAssetExportSessionStatusFailed"); 
      break; 
    } 
   }]; 
}

我這里用了一個提醒，因為我的服務器比較弱，不能傳太大的文件

-(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:@"視頻%@，大于2MB會有點慢，確定上傳嗎？", 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];//取消之后就刪除，以免占用手機硬盤空間（沙盒） 
  }]]; 
  [alertController addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { 
   [self uploadVideo:URL]; 
  }]]; 
  [self presentViewController:alertController animated:YES completion:nil]; 
 }else if(sizemb>5){ 
  message = [NSString stringWithFormat:@"視頻%@，超過5MB，不能上傳，抱歉。", sizeString]; 
  UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil 
                     message: message 
                   preferredStyle:UIAlertControllerStyleAlert]; 
  [alertController addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { 
   [[NSNotificationCenter defaultCenter] postNotificationName:@"refreshwebpages" object:nil userInfo:nil]; 
   [[NSFileManager defaultManager] removeItemAtPath:[URL path] error:nil];//取消之后就刪除，以免占用手機硬盤空間 
  }]]; 
  [self presentViewController:alertController animated:YES completion:nil]; 
 } 
}

最后上上傳的代碼，這個是根據服務器來的，而且還是用的MKNetworking，據說已經過時了，放上來大家參考一下吧，AFNet也差不多，就是把NSData傳上去。

-(void)uploadVideo:(NSURL*)URL{ 
 //[MyTools showTipsWithNoDisappear:nil message:@"正在上傳..."]; 
 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];//上傳之后就刪除，以免占用手機硬盤空間; 
  }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]; 
}

以上所述是小編給大家介紹的iOS視頻錄制（或選擇）壓縮及上傳功能（整理），希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對億速云網站的支持！

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