Trim video always fail when use AVAssetExportPresetPassthrough - swift

Question

My trimming video code:
func trim(createNew: Bool, with name: String?, file: File, startTime: Double, endTime: Double, completion: #escaping ResultCompletion<File>) {
guard checkFreeSpace(with: file) else {
return handleFailure(error: .fullStorage, completion: completion)
}
guard let originUrl = file.localUrl(),
let originName = file.name.components(separatedBy: ".").first,
let originExtension = file.name.components(separatedBy: ".").last else {
return handleFailure(error: .mediaSavingError, completion: completion)
}
let asset = AVAsset(url: originUrl)
let timeZoneOffset = TimeInterval(TimeZone.current.secondsFromGMT())
let newDate = Date().addingTimeInterval(timeZoneOffset)
let temporaryFileId = "\(file.device ?? "Unknown")-\(newDate.milliseconds)-0-\(originName)_trim.\(originExtension)"
let outputUrl = file.buildLocalUrl(id: temporaryFileId)
AVAssetExportSession.determineCompatibility(
ofExportPreset: AVAssetExportPresetPassthrough,
with: asset,
outputFileType: .mp4) { isCompatible in
print("Can Trim MP4: ", isCompatible)
}
guard let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetPassthrough) else {
return handleFailure(error: .mediaSavingError, completion: completion)
}
exportSession.outputURL = outputUrl
exportSession.outputFileType = .mp4
let timeRange = CMTimeRange(start: CMTime(seconds: startTime, preferredTimescale: 900),
end: CMTime(seconds: endTime, preferredTimescale: 900))
exportSession.timeRange = timeRange
exportSession.exportAsynchronously { [weak self] in
guard let self = self else {
return
}
exportProgressTimer.invalidate()
switch exportSession.status {
case .completed:
completion(.success(file))
case .failed:
self.handleFailure(error: .mediaSavingError, completion: completion)
case .cancelled:
completion(.failure(FileError.mediaExportCanceled))
default:
break
}
}
}
determineCompatibility return true
When use another preset like that contained in AVAssetExportSession.exportPresets(compatibleWith: item.asset), all do makes awesome
Maybe someone can explain what goes wrong and how I can fixed it? i need resolution the same like at original video
Or how I can convert with AVAssetWriter and AVAssetReader ?

Answer 1

I wrote anwer in another question, they have the same problem, but it different way. That's how I solved the problem
https://stackoverflow.com/a/70294032/7217629