视频方向UIImagePickerController [英] video orientation UIImagePickerController

问题描述

我使用UIImagePickerController选择视频，然后使用ASIHTTPRequest将视频上传到Web服务器。但是，使用iPhone拍摄的视频在横向或纵向中颠倒倒置在Web服务器上。当这些上传的视频在iPhone上观看时，它们也会在75％左右垂直缩放，以便它们看起来被压扁。

I am choosing videos using UIImagePickerController, then uploading the video to a web server using ASIHTTPRequest. However, videos that were shot with the iPhone held upside-down in landscape or portrait are inverted on the web server. When those uploaded videos are viewed on an iPhone, they are also scaled thy 75% or so vertically so that they appear squished.

有没有办法确定视频方向使用UIImagePickerController选择的视频（包括它是否被颠倒）？

Is there a way to determine the video orientation (including whether it was shot upside-down) of a video chosen using UIImagePickerController?

另外，有没有办法在上传之前更改视频的方向？

Also, is there a way to change the orientation of the video before uploading?

我也是喜欢不允许上传以纵向拍摄的视频。

I'd also like to not allow uploads of video shot in portrait orientation.

谢谢

推荐答案

在另一篇文章中找到答案。 AVAsset为您提供了两个属性，[avAsset naturalSize]和[avAsset preferredTransform]，可让您确定视频方向。

Found the answer in anther post. AVAsset gives you two properties, [avAsset naturalSize] and [avAsset preferredTransform], that allow you to determine the video orientation.

以下是相关帖子：

如果以纵向或横向录制视频文件，如何检测（iPhone SDK）。

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