如何将NSData文件作为Video写入Photolibrary/SavedPhotosAlbum? [英] how can i write a NSData file as Video in to Photolibrary/SavedPhotosAlbum?

问题描述

我有一个Video文件，如NSData.如何将NSData文件作为Video写入Photolibrary/SavedPhotosAlbum?

我通过以下代码使用UIimage完成了此操作.我有一个UiImage作为 myNsData (NSData)

  UIImage * viewImage = [UIImage imageWithData:myNsData];ALAssetsLibrary * library = [[ALAssetsLibrary alloc] init];//请求将图像保存到相机胶卷[图书馆writeImageToSavedPhotosAlbum:[viewImage CGImage]方向:(ALAssetOrientation)[viewImage imageOrientation]完成块:^(NSURL * assetURL，NSError * error){} 

我该如何为视频执行相同的功能.

我在NSData calss中搜索了.

我发现只有两种方法.他们是

 (void)writeVideoAtPathToSavedPhotosAlbum:(NSURL *)videoPathURLcompleteBlock:(ALAssetsLibraryWriteVideoCompletionBlock)completionBlock;-(BOOL)videoAtPathIsCompatibleWithSavedPhotosAlbum:(NSURL *)videoPathURL; 

其中两个正在使用URL.实际上，除了Photolibrary/SavedPhotosAlbum中的任何地方，我都不想写NSData文件.

我需要像保存图像一样直接将NSData文件写入到Photolibrary/SavedPhotosAlbum中.该怎么办?有没有人可以帮助我?

解决方案

您需要使用视频AVAssetWriterInput创建一个AVAssetWriter并将您的数据添加到输入中.

创建AVAssetWriter时，需要指定资产的URL.

在您可以使用ALAssetsLibrary(writeVideoAtPathToSavedPhotosAlbum:completionBlock :)将资产与上面创建的资产的URL写入照片库后.

i have a Video file as NSData.how can i write the NSData file as Video in to Photolibrary/SavedPhotosAlbum?

i done it with UIimage through the following code. i had a UiImage as myNsData(NSData)

UIImage *viewImage = [UIImage imageWithData:myNsData];    

  ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];  
  // Request to save the image to camera roll  
  [library writeImageToSavedPhotosAlbum:[viewImage CGImage] orientation:(ALAssetOrientation)[viewImage imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
}

how can i do it the same functionality for Video.

i searched in NSData calss .

i found only two ways. they are

(void)writeVideoAtPathToSavedPhotosAlbum:(NSURL *)videoPathURL completionBlock:(ALAssetsLibraryWriteVideoCompletionBlock)completionBlock;

- (BOOL)videoAtPathIsCompatibleWithSavedPhotosAlbum:(NSURL *)videoPathURL;

two of them are using URL.actually i didn't want to write the NSData file any where except in Photolibrary/SavedPhotosAlbum.

i need to write the NSData file directly in to the Photolibrary/SavedPhotosAlbum like i saved an image.How can do that?can any one Help me?

解决方案

You need to create an AVAssetWriter with a video AVAssetWriterInput and add your data into the input.

When you create the AVAssetWriter, you need to specify an URL for the asset.

After you can use the ALAssetsLibrary (writeVideoAtPathToSavedPhotosAlbum:completionBlock:) to write the asset to the photo library, with the url of the asset created above.

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