I'm creating a simple audio editing tool to trim and delete from an audio.I implemented the trim function and it is working fine. However I searched and tried to implement the delete function and here is my code:
func deleteExportAsset(_ asset: AVAsset, fileName: String, completeAudioTime: CGFloat) -> URL { print("\(#function)") let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] let trimmedSoundFileURL = documentsDirectory.appendingPathComponent(fileName) print("saving to \(trimmedSoundFileURL.absoluteString)") if FileManager.default.fileExists(atPath: trimmedSoundFileURL.absoluteString) { print("sound exists, removing \(trimmedSoundFileURL.absoluteString)") do { if try trimmedSoundFileURL.checkResourceIsReachable() { print("is reachable") } try FileManager.default.removeItem(atPath: trimmedSoundFileURL.absoluteString) } catch { print("could not remove \(trimmedSoundFileURL)") print(error.localizedDescription) } } print("creating export session for \(asset)") if let exporter = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetAppleM4A) { exporter.outputFileType = AVFileType.m4a exporter.outputURL = trimmedSoundFileURL let timeRange1 = CMTimeRangeFromTimeToTime(CMTime(seconds: 0, preferredTimescale: 100), CMTime(seconds: endTimeOfRange1, preferredTimescale: 100)) let timeRange2 = CMTimeRangeFromTimeToTime(CMTime(seconds: startTimeOfRange2)), preferredTimescale: 100), CMTime(seconds: Double(completeAudioTime), preferredTimescale: 100)) exporter.timeRange = CMTimeRangeGetUnion(timeRange1, timeRange2) // do it exporter.exportAsynchronously(completionHandler: { print("export complete \(exporter.status)") switch exporter.status { case AVAssetExportSessionStatus.failed: if let e = exporter.error { print("export failed \(e)") } case AVAssetExportSessionStatus.cancelled: print("export cancelled \(String(describing: exporter.error))") default: print("export complete") } }) } else { print("cannot create AVAssetExportSession for asset \(asset)") } return trimmedSoundFileURL}what I'm doing here is creating 2 Ranges. Range1 from 0 ->time1 and Range2 from time2->endOfAudio. (I want to delete from time1 -> time2)
then I'm creating the union between 2 ranges. however, nothing is happening to the audio. It is saved exactly like it was before this function.
