图片无法在VIPlayer播放 about cabbage HOT 4 CLOSED

timeline.videoChannel.enumerated().forEach({ (offset, provider) in
            for index in 0..<provider.numberOfVideoTracks() {
                let trackID: Int32 = getVideoTrackID(for: index) + Int32((offset % 2 + 1) * 1000)
                if let compositionTrack = provider.videoCompositionTrack(for: composition, at: index, preferredTrackID: trackID) {
                    let info = mainVideoTrackInfo.first(where: { $0.track == compositionTrack })
                    if let info = info {
                        info.info.append(provider)
                    } else {
                        let info = TrackInfo.init(track: compositionTrack, info: [provider])
                        mainVideoTrackInfo.append(info)
                    }
                }
            }

 private static let emptyAsset: AVAsset? = {
        let bundle = Bundle(for: ImageResource.self)
        /// 这里添加的3行代码解决了上述问题
        if let videoURL = bundle.url(forResource: "black_empty", withExtension: "mp4") {
            return AVAsset(url: videoURL)
        }
        if let bundleURL = bundle.resourceURL?.appendingPathComponent("Cabbage.bundle") {
            let resourceBundle = Bundle.init(url: bundleURL)
            if let videoURL = resourceBundle?.url(forResource: "black_empty", withExtension: "mp4") {
                return AVAsset(url: videoURL)
            }
        }
        
        if let url = Bundle.main.url(forResource: "black_empty", withExtension: "mp4") {
            let asset = AVAsset(url: url)
            return asset
        }
        
        return nil
    }()