问题描述
我使用UIImagePickerController来允许我的用户从资源库中选择一个视频。
I'm using UIImagePickerController to allow my user to select a video from the asset library.
当用户在第二个屏幕上选择选择按钮时，视图显示进度条和压缩视频...消息。
When the user selects the "Choose" button on the second screen, the view displays a progress bar and a "Compressing Video..." message.
为什么会发生这种情况？
Why is this happening?
有没有办法我可以避免这种压缩操作？
Is there some way I can avoid this compression operation?
推荐答案
答案：目前没有办法控制UIImagePickerController如何压缩所选视频。
Answer: There is currently no way to control how UIImagePickerController compresses the picked video.
我只是做了一些快速测试。使用我创建的测试应用程序，我选择了相同的视频两次 - 一次与 videoQuality 属性设置为 UIImagePickerControllerQualityTypeHigh 并且一次设置为 UIImagePickerControllerQualityTypeLow 。复制的结果文件大小完全相同，15.1MB，帧大小为360x480。原来是72.5MB，帧大小为480x640。显然这个属性不会影响所使用的压缩。
I just did some quick tests. Using a test app I created, I picked the same video two times -- once with the videoQuality property set to UIImagePickerControllerQualityTypeHigh and once with it set to UIImagePickerControllerQualityTypeLow. The resulting files that were copied over are exactly the same size, 15.1MB with a frame size of 360x480. The original was 72.5MB with a frame size of 480x640. Apparently this property doesn't affect the compression used at all.
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