音訊轉碼

轉碼格式

您可以使用相應的函數將音頻從一種原始或編碼格式轉碼為另一種格式。

Blueprint

C++

// From encoded file to encoded file
URuntimeAudioTranscoder::TranscodeEncodedDataFromFile(TEXT("C:/Folder/AudioFrom.mp3"), ERuntimeAudioFormat::Auto,
   TEXT("C:/Folder/AudioTo.ogg"), ERuntimeAudioFormat::OggVorbis,
   100, FRuntimeAudioExportOverrideOptions(),
   FOnEncodedDataTranscodeFromFileResultNative::CreateWeakLambda(this, [](bool bSucceeded)
   {
   	// Handle the result	
   }));

// From encoded buffer to encoded buffer
TArray64<uint8> EncodedDataFrom;
URuntimeAudioTranscoder::TranscodeEncodedDataFromBuffer(EncodedDataFrom, ERuntimeAudioFormat::Auto,
   ERuntimeAudioFormat::Wav,
   100, FRuntimeAudioExportOverrideOptions(),
   FOnEncodedDataTranscodeFromBufferResultNative::CreateWeakLambda(this, [](bool bSucceeded, const TArray64<uint8>& EncodedData)
   {
   	// Handle the result
   }));

// From RAW file to RAW file
URuntimeAudioTranscoder::TranscodeRAWDataFromFile(TEXT("C:/Folder/AudioFrom.raw"), ERuntimeRAWAudioFormat::Int16,
   TEXT("C:/Folder/AudioTo.raw"), ERuntimeRAWAudioFormat::Float32,
   FOnRAWDataTranscodeFromFileResultNative::CreateWeakLambda(this, [](bool bSucceeded)
   {
   	// Handle the result
   }));

// From RAW buffer to RAW buffer
TArray64<uint8> RAWDataFrom;
URuntimeAudioTranscoder::TranscodeRAWDataFromBuffer(RAWDataFrom, ERuntimeRAWAudioFormat::Int8,
   ERuntimeRAWAudioFormat::Int32,
   FOnRAWDataTranscodeFromBufferResultNative::CreateWeakLambda(this, [](bool bSucceeded, const TArray64<uint8>& RAWData)
   {
   	// Handle the result
   }));

將 float 陣列轉換為位元組

您可以將浮點數陣列（例如 32 位元浮點 PCM 資料）轉換為位元組陣列。當您的音訊資料需要以位元組形式使用時（例如用於網路傳輸或特定處理系統），這就會很有用。在使用如 OnGeneratePCMData 或 OnPopulateAudioData 等委派時，通常需要進行此轉換，因為它們會輸出浮點 PCM 資料。

Blueprint

C++

// Assuming FloatArray is an array of floats (such as 32-bit float PCM data)
TArray<float> FloatArray;

// Synchronous
TArray<uint8> ByteArray = URuntimeAudioUtilities::ConvertFloatArrayToBytes(FloatArray);

// Asynchronous
URuntimeAudioUtilities::ConvertFloatArrayToBytesAsync(FloatArray,
   FOnConvertFloatArrayToBytesResultNative::CreateWeakLambda(this, [this](const TArray<uint8>& ByteArray)
   {
   	// Handle the result
   }));