如何通过手机

时间:2016-10-13 05:12:01

标签: ios video compression

我正在制作iOS应用程序(即将推出Android),该应用程序涉及用户通过应用程序在手机上录制视频。但我需要该应用程序来减少这些视频的默认大小,以便在将它们上传到我的服务器时使用更少的带宽并且上传速度更快。最好的方法是什么?

1 个答案:

答案 0 :(得分:1)

尝试此代码希望您的任务完成。

- (void)convertVideoToLowQuailty:(NSURL*)inputURL 
                                       outputURL:(NSURL*)outputURL 
                                         handler:(void (^)(AVAssetExportSession*))handler
    {
        [[NSFileManager defaultManager] removeItemAtURL:outputURL error:nil];
        AVURLAsset *asset = [AVURLAsset URLAssetWithURL:inputURL options:nil];
        AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetLowQuality];
        exportSession.outputURL = outputURL;
        exportSession.outputFileType = AVFileTypeQuickTimeMovie;
        [exportSession exportAsynchronouslyWithCompletionHandler:^(void) 
        {
            handler(exportSession);
            [exportSession release];
        }];
    }

    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

    {   
        NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
        NSURL *outputURL = [NSURL fileURLWithPath:@"/Users/Hems/Desktop/output.mov"];
        [self convertVideoToLowQuailty:videoURL outputURL:outputURL handler:^(AVAssetExportSession *exportSession)
         {
             if (exportSession.status == AVAssetExportSessionStatusCompleted)
             {
                 printf("completed\n");
             }
             else
             {
                 printf("error\n");

             }
         }];

    }