在ios中获取视频的FPS

import AVFoundation

func getVideoFPS(url: URL) -> Float {
    let asset = AVAsset(url: url)
    guard let videoTrack = asset.tracks(withMediaType: .video).first else {
        return 0.0
    }
    
    let formatDescriptions = videoTrack.formatDescriptions as! [CMFormatDescription]
    for formatDescription in formatDescriptions {
        let extensions = CMFormatDescriptionGetExtensions(formatDescription) as NSDictionary?
        if let frameRate = extensions?[kCMFormatDescriptionExtension_Framerate] as? NSNumber {
            return frameRate.floatValue
        }
    }
    
    return 0.0
}

// 使用示例
let videoURL = URL(fileURLWithPath: "path_to_your_video")
let fps = getVideoFPS(url: videoURL)
print("视频的帧率为：\(fps)")