Xcode 从UIImagePickerController获取修剪的视频文件大小

使用

UIImagePickerController

选择视频后，我可以从其

[defaultRepresentation size]

但是，如果启用选择器的修剪选项，

[defaultRepresentation size]

将返回与原始未修剪视频相同的文件大小

有没有人有办法检索经过修剪的视频的文件大小

非常感谢

是的，我应该包括一些代码。我很难过

我试图实现的是让用户选择并修剪现有视频，然后上传修剪后的版本。我想有修剪版本的文件大小，以便在上传过程中填充进度栏。我还想修剪版本的持续时间

调用方法是：

-(IBAction)selectVideoPressed:(id)sender
{

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])

{

    UIImagePickerController *videoPicker = [[UIImagePickerController alloc] init];
    [videoPicker setDelegate: self];
    [videoPicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
    [videoPicker setMediaTypes:[NSArray arrayWithObjects:(NSString *)kUTTypeMovie, nil]];
    [videoPicker setVideoQuality:vvi.videoQuality];
    [videoPicker setAllowsEditing:YES];
    [videoPicker setModalTransitionStyle:gTransitionStyle];

    [self presentViewController:videoPicker animated:YES completion:Nil];

}

}

用户修剪并按下“选择”按钮后激发的委托方法是：

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

[vvi setRawSourceVideoFileURL:[info objectForKey:UIImagePickerControllerMediaURL]];
[vvi setSourceVideoURL:[info objectForKey:UIImagePickerControllerReferenceURL]];

ALAssetsLibrary *assetLibrary = [[ALAssetsLibrary alloc] init];
ALAssetsLibraryAssetForURLResultBlock resultBlock = ^(ALAsset *myAsset)

{

    // Video metrics info.

    [vvi setVideoDuration:[myAsset valueForProperty:ALAssetPropertyDuration]];
    [vvi setVideoOrientation:[myAsset valueForProperty:ALAssetPropertyOrientation]];
    NSDate *videoDate = [myAsset valueForProperty:ALAssetPropertyDate];
    [vvi setVideoDateString:[videoDate descriptionWithLocale:[NSLocale currentLocale]]];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:gShortDateFormat];
    [vvi setShortVideoDateString:[dateFormatter stringFromDate:videoDate]];

    ALAssetRepresentation *myAssetRepresentation = [myAsset defaultRepresentation];
    [vvi setVideoAssetSize:[NSNumber numberWithLongLong:[myAssetRepresentation size]]];

    NSLog(@"Duration:%@", vvi.videoDuration);
    NSLog(@"Size:%@", vvi.videoAssetSize);

};

 ....

vvi

只是我自己的自定义类。 两个NSLog返回原始未剪辑视频的持续时间和大小。使用

[vvi setRawSourceVideoFileURL:[info-objectForKey:UIImagePickerControllerMediaURL]]指向的视频返回正确修剪的视频

非常感谢
 类似的内容应该注意查找从UIImagePickerController返回的选定图像或视频的文件大小

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

        NSURL *videoUrl=(NSURL*)[info objectForKey:UIImagePickerControllerMediaURL];

        //Error Container
        NSError *attributesError;
        NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:[videoUrl path] error:&attributesError];
        NSNumber *fileSizeNumber = [fileAttributes objectForKey:NSFileSize];
        long long fileSize = [fileSizeNumber longLongValue];
}

您为实现此目的而尝试的代码片段是必需的。@hpiOSCoder是的，我想代码会有所帮助……其他地方也曾询问过此问题，但这是最完整的答案！我们能为这个plz提供swift 3版本吗