Exploring possible modern APIs for something like AVAssetExportSession

VFAExportSession.swift

// Old way
let session = VFAExportSession(asset: asset)
session.timeRange = CMTimeRange(start: .seconds(1), duration: .seconds(3))
session.audioMix = audioMix
session.audioOutputConfiguration = [
    AVFormatIDKey: kAudioFormatMPEG4AAC,
    AVNumberOfChannelsKey: NSNumber(value: 2),
    AVSampleRateKey: NSNumber(value: 44_100.0),
]
session.videoComposition = videoComposition
session.videoOutputConfiguration = [
    AVVideoCodecKey: AVVideoCodecType.h264.rawValue,
    AVVideoWidthKey: NSNumber(value: Int(size.width)),
    AVVideoHeightKey: NSNumber(value: Int(size.height)),
    AVVideoCompressionPropertiesKey: [
        AVVideoAverageBitRateKey: NSNumber(value: videoBitrate),
        AVVideoProfileLevelKey: AVVideoProfileLevelH264HighAutoLevel as String,
    ] as [String: Any],
    // Strip out HDR since Mastodon doesn't support it
    AVVideoColorPropertiesKey: [
        AVVideoColorPrimariesKey: AVVideoColorPrimaries_ITU_R_709_2,
        AVVideoTransferFunctionKey: AVVideoTransferFunction_ITU_R_709_2,
        AVVideoYCbCrMatrixKey: AVVideoYCbCrMatrix_ITU_R_709_2,
    ],
]
session.optimizeForNetworkUse = true

// New way?
let session = VFAExportSession(asset: asset)
    .timeRange(CMTimeRange(start: .seconds(1), duration: .seconds(3)))
    .audio(mix: audioMix, output: .format(.m4a).channels(2).sampleRate(44_100))
    .video(
        composition: videoComposition,
        output: .format(.h264(profile: .highAuto))
            .dimensions(width: 1920, height: 1080)
            .bitrate(5_000_000)
            .color(.ITU_R_709)
    )
    .optimizeForNetworkUse()