Question

我目前正在使用UIImagePickerController录制视频并保存。我使用1080p质量，因此短视频仍然很大。在我的应用中，用户可以通过电子邮件发送他们录制的视频，因此拥有大型视频并不合适。有什么方法可以保存2个版本的视频（高质量和低质量），一个保存在〜/ app-folder / video-name.mov，然后另一个保存在〜/ app-folder / video-name-SD .mov格式？或者保存高清视频，但不知何故有SD版本？欢迎所有解决方案，而不仅仅是保存SD版本。这就是我正在做的事情：

  - (BOOL)startCameraControllerFromViewController:(UIViewController *)controller
                                      usingDelegate:(id)delegate {

//setup for video recording
//imagePickerWithout is a subclass of UIImagePicker

        imagePickerWithout *cameraUI = [[imagePickerWithout alloc] init];
        cameraUI.videoQuality = UIImagePickerControllerQualityTypeHigh;

        [controller presentViewController:cameraUI animated:YES completion:nil];
        return YES;
    }

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

//setup video

        NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
        NSData *videoData = [NSData dataWithContentsOfURL:videoURL];

            //pseudocode :(
            NSData *lowQualData = [NSData LOW_QUALITY_VERSION_OF_URL:videoURL];

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        int random = arc4random() % 80085;

        NSString *tempPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@_%@_%@_%d.mov", self.person.first, self.person.last, self.person.age, random]];

NSString *sdPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@_%@_%@_%dLOWQUAL.mov", self.person.first, self.person.last, self.person.age, random]];

        NSFileManager *fileManager = [NSFileManager defaultManager];

        BOOL success = [videoData writeToFile:tempPath atomically:YES];
            BOOL success = [lowQualData writeToFile:sdPath atomically:YES];

        NSError *error = nil;
        [_managedObjectContext save:&error]
}
[self dismissViewControllerAnimated:YES completion:nil];
}

Answer 1

首先以高质量录制视频，然后使用AVAssetWriter或AVAssetExportSession制作质量较低的副本，如下所述：

iPhone:Programmatically compressing recorded video to share?

录制高清视频，保存低质量视频

1 个答案: