iOS：在不播放视频的情况下获取视频时长和缩略图

iOS：在不播放视频的情况下获取视频时长和缩略图

swift
import AVFoundation
func getVideoDuration(url: URL) -> Double? {
    let asset = AVURLAsset(url: url)
    let duration = asset.duration
    let durationInSeconds = CMTimeGetSeconds(duration)
    return durationInSeconds
}
// 调用示例
let videoURL = URL(fileURLWithPath: "path_to_video_file")
if let duration = getVideoDuration(url: videoURL) {
    print("视频时长为：\(duration)秒")
} else {
    print("无法获取视频时长")
}

swift
import AVFoundation
import UIKit
func getVideoThumbnail(url: URL) -> UIImage? {
    let asset = AVURLAsset(url: url)
    let generator = AVAssetImageGenerator(asset: asset)
    
    generator.appliesPreferredTrackTransform = true
    let time = CMTimeMake(value: 0, timescale: 1)
    
    var thumbnail: UIImage?
    
    do {
        let imageRef = try generator.copyCGImage(at: time, actualTime: nil)
        thumbnail = UIImage(cgImage: imageRef)
    } catch let error as NSError {
        print("无法获取视频缩略图：\(error)")
    }
    
    return thumbnail
}
// 调用示例
let videoURL = URL(fileURLWithPath: "path_to_video_file")
if let thumbnail = getVideoThumbnail(url: videoURL) {
    // 在这里可以使用缩略图，比如显示在UIImageView上
    imageView.image = thumbnail
} else {
    print("无法获取视频缩略图")
}