Question

如何将video转换为LivePhoto？

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {

}

谢谢。

Answer 1

/// Requests a Live Photo from the given resource URLs. The result handler will be called multiple times to deliver new PHLivePhoto instances with increasingly more content. If a placeholder image is provided, the result handler will first be invoked synchronously to deliver a live photo containing only the placeholder image. Subsequent invocations of the result handler will occur on the main queue.
//  The targetSize and contentMode parameters are used to resize the live photo content if needed. If targetSize is equal to CGRectZero, content will not be resized.
//  When using this method to provide content for a PHLivePhotoView, each live photo instance delivered via the result handler should be passed to -[PHLivePhotoView setLivePhoto:].
+ (PHLivePhotoRequestID)requestLivePhotoWithResourceFileURLs:(NSArray<NSURL *> *)fileURLs placeholderImage:(UIImage *__nullable)image targetSize:(CGSize)targetSize contentMode:(PHImageContentMode)contentMode resultHandler:(void(^)(PHLivePhoto *__nullable livePhoto, NSDictionary *info))resultHandler;

Answer 2

使用PHLivePhoto类方法，您可以创建任何MOV视频到实时照片

+(PHLivePhotoRequestID)requestLivePhotoWithResourceFileURLs:(NSArray<NSURL *> *)fileURLs placeholderImage:(UIImage *__nullable)image targetSize:(CGSize)targetSize contentMode:(PHImageContentMode)contentMode
 resultHandler:(void(^)(PHLivePhoto *__nullable livePhoto, NSDictionary *info))resultHandler;

Answer 3

转换视频是一项有点棘手的任务。流程如下

制作现场照片需要第一个 imageUrl 和一个 videoUrl
向该图像文件添加一个元数据，即内容标识符
向视频文件添加相同的内容标识符元数据
向视频添加另一个元数据，即图像的帧时间戳，该图像将显示为缩略图（第一步中使用的图像）

在图片和视频文件中添加元数据后使用下面的api

PHLivePhoto.request(withResourceFileURLs fileURLs: [URL], placeholderImage image: UIImage?, targetSize: CGSize, contentMode: PHImageContentMode, resultHandler: @escaping (PHLivePhoto?, [AnyHashable : Any]) -> Void) -> PHLivePhotoRequestID

请查看 this answer，其中对制作实时照片对象所需的元数据进行了精美的解释。

您可以查看 following GitHub project 以获取代码参考。

Answer 4

在最新的iOS SDK中无法将其他文件转换为Live Photo，但某些工具应用程序可以执行此操作，例如Live Studio。并且可能有一些在线教程解释如何从其他文件中创建Live Photo，您可以学习。也许你可以通过iOS激发一种方式。

祝你好运！

[iOS]如何将视频转换为LivePhoto？

4 个答案: