合并后合并多个视频时，我看到一些视频会自动将自己的方向（例如人像）更改为横向，所以我希望所有视频都具有自己的原始格式而不旋转。如何解决这个问题。
我的代码：
func mergeVideos(arrayVideos:[AVAsset])
{
var atTimeM: CMTime = CMTimeMake(0, 0)
var layerInstructionsArray = [AVVideoCompositionLayerInstruction]()
var completeTrackDuration: CMTime = CMTimeMake(0, 1)
var videoSize: CGSize = CGSize(width: 0.0, height: 0.0)
var totalTime : CMTime = CMTimeMake(0, 0)
let mixComposition = AVMutableComposition.init()
for videoAsset in arrayVideos{
let videoTrack = mixComposition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID: Int32(kCMPersistentTrackID_Invalid))
do {
if videoAsset == arrayVideos.first {
atTimeM = kCMTimeZero
} else {
atTimeM = totalTime // <-- Use the total time for all the videos seen so far.
}
try videoTrack?.insertTimeRange(CMTimeRangeMake(kCMTimeZero, videoAsset.duration),
of: videoAsset.tracks(withMediaType: AVMediaType.video)[0],
at: completeTrackDuration)
videoSize = (videoTrack?.naturalSize)!
} catch let error as NSError {
print("error: \(error)")
}
totalTime = CMTimeAdd(totalTime, videoAsset.duration)
let exporter = AVAssetExportSession(asset: mixComposition, presetName: AVAssetExportPresetHighestQuality)............
............
.......countinue