从ALAsset url iOS获取视频NSData

问题描述

我无法从从ALAsset获取的URL中检索NSData

I am not able to retrieve NSData from the url that I get from ALAsset

下面是我试过的代码： - 我总是得到NSData为nil。 p>

Below is the code I tried:- I always get NSData as nil.

 NSData *webData = [NSData dataWithContentsOfURL:[asset defaultRepresentation].url];

我也尝试过这样

 NSData *webData1 = [NSData dataWithContentsOfURL:[[asset valueForProperty:ALAssetPropertyURLs] valueForKey:[[[asset valueForProperty:ALAssetPropertyURLs] allKeys] objectAtIndex:0]]];

我从ALAsset获得的网址： -

The url that I get from the ALAsset:-

assets-library：//asset/asset.MOV？id = 1000000116& ext = MOV

assets-library://asset/asset.MOV?id=1000000116&ext=MOV

我试过这个下面的链接，但我需要不必要的写入临时位置，这是非常耗时的。

I have tried this below link which works but I need to unnecessary write to a temp location which is very time consuming.

非常感谢任何向正确方向的提示。

Any hint in right direction would be highly appreciated.

等待您的回复

推荐答案

请尝试以下代码： -

try this code:-

ALAssetRepresentation *rep = [asset defaultRepresentation];
Byte *buffer = (Byte*)malloc((NSUInteger)rep.size);
NSUInteger buffered = [rep getBytes:buffer fromOffset:0.0 length:(NSUInteger)rep.size error:nil];
NSData *data = [NSData dataWithBytesNoCopy:buffer length:buffered freeWhenDone:YES];

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