swift - 是否可以像 Netflix 应用程序一样在滚动视频时间线的同时制作预览图像？

Question

是否可以在列出视频时间线的同时制作预览图像，就像在带有 AVPlayer 的 Netflix 应用程序中一样？ exmple here

我发现mp4视频有预览窗口，但m3u8格式没有

func playVideo(cell:  MovieCell) {
    guard let urlVideo = URL(string: cell.movieSrc) else { return }

    // Create an AVPlayer, passing it the HTTP Live Streaming URL.
    let player = AVPlayer(url: urlVideo)

    // Create a new AVPlayerViewController and pass it a reference to the player.
    let controller = AVPlayerViewController()
    controller.player = player

    // Modally present the player and call the player's play() method when complete.
    self.present(controller, animated: true) {
        player.play()
    }
}

Answer 1

这称为“Trick Play”，必须包含在 HLS list 中，以便 AVPlayer 为您处理此问题。

请参阅Trick Play HLS Authoring Specification for Apple Devices 中的部分:

6.1. I-frame playlists (EXT-X-I-FRAME-STREAM-INF) MUST be provided to support scrubbing and scanning UI.