ios录制视频并上传

在网上摘录的片段整理

//选择本地视频 
- (void)chooseLocalVideo 
{ 
 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)startTranscribeVideo 
{ 
 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 
}

获取视频的大小和时长

- (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。

视频的转码和压缩

//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 
{ 
//presetName 几种格式
//AVAssetExportPresetLowQuality,
//AVAssetExportPreset960x540,
//AVAssetExportPreset640x480,
//AVAssetExportPresetMediumQuality,
//AVAssetExportPreset1920x1080,
//AVAssetExportPreset1280x720,
//AVAssetExportPresetHighestQuality,
//AVAssetExportPresetAppleM4A
 AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:inputURL options:nil]; 
  AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality]; 
  // NSLog(resultPath); 
  exportSession.outputURL = outputURL; 
  exportSession.outputFileType = AVFileTypeMPEG4; //转换的格式
  exportSession.shouldOptimizeForNetworkUse= YES; 
  [exportSession exportAsynchronouslyWithCompletionHandler:^(void) 
   { 
    switch (exportSession.status) { 
     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 
      NSLog(@"这地方写你的上传视频或者再次判断视频的大小等等"); 
      break; 
     case AVAssetExportSessionStatusFailed: 
      NSLog(@"AVAssetExportSessionStatusFailed"); 
      break; 
    } 
   }]; 
}