合并两个音频文件失败

Question

Domain = AVFoundationErrorDomain Code = -11838 \“Operation Stopped \”UserInfo = {NSLocalizedDescription = Operation Stopped，NSLocalizedFailureReason =此媒体不支持该操作。}）“）

{origin：caf lpcm，destination：aiff or wav or caf}}

以下是代码：

        let composition = AVMutableComposition()
        self.prepareToCombineMedia(composition)

        let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetPassthrough)!

        let tmpFilePath = FileUtils.tempFile(ext: "caf")
        exportSession.outputURL = NSURL.fileURL(withPath: tmpFilePath)
        exportSession.outputFileType = AVFileTypeCoreAudioFormat
        exportSession.exportAsynchronously {
            if exportSession.status == .completed {
                print("completed")
                print(tmpFilePath)
                subscriber.onCompleted()
            } else {
                subscriber.onError(LeafError.runtime(message: exportSession.error.debugDescription))
                FileUtils.rm(tmpFilePath)
            }
        }

它只能合并到m4a或mov。我需要caf或wav或aiff文件，帮助......

Answer 1

替换此行：

let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetPassthrough)!

with：

let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetAppleM4A)

希望它能起作用