如何在swift中实现AVAssetImageGenerator.copyCGImageAtTime
发布时间:2020-12-14 05:23:18 所属栏目:百科 来源:网络整理
导读:到目前为止,我有以下几点 let assetUrl = NSURL.URLWithString(self.targetVideoString) let asset: AVAsset = AVAsset.assetWithURL(assetUrl) as AVAsset let imageGenerator = AVAssetImageGenerator(asset: asset); let time : CMTime = CMTimeMakeWithS
到目前为止,我有以下几点
let assetUrl = NSURL.URLWithString(self.targetVideoString) let asset: AVAsset = AVAsset.assetWithURL(assetUrl) as AVAsset let imageGenerator = AVAssetImageGenerator(asset: asset); let time : CMTime = CMTimeMakeWithSeconds(1.0,1) let actualTime : CMTime let myImage: CGImage =imageGenerator.copyCGImageAtTime(requestedTime: time,actualTime:actualTime,error: <#NSErrorPointer#>) 最后一行是我迷路的地方……我只是想在1.0秒时抓到一张图片
该函数声明为
func copyCGImageAtTime(requestedTime: CMTime,actualTime: UnsafeMutablePointer<CMTime>,error outError: NSErrorPointer) -> CGImage! 你必须传递(初始化)CMTime和NSError?变量为“in-out expression”与& ;: let assetUrl = NSURL(string: ...) let asset: AVAsset = AVAsset.assetWithURL(assetUrl) as AVAsset let imageGenerator = AVAssetImageGenerator(asset: asset); let time = CMTimeMakeWithSeconds(1.0,1) var actualTime : CMTime = CMTimeMake(0,0) var error : NSError? let myImage = imageGenerator.copyCGImageAtTime(time,actualTime: &actualTime,error: &error) 还要注意你的第一行 let assetUrl = NSURL.URLWithString(self.targetVideoString) 使用当前的Xcode 6.1不再编译. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |