轉碼音訊

轉碼格式

您可以使用對應的函式，將音訊從一種 RAW 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
	}));

將浮點數陣列轉換為位元組

您可以將浮點數陣列（例如，32位元浮點PCM數據）轉換為位元組陣列。當您的音頻數據需要以位元組形式存在時（例如用於網路傳輸或某些處理系統），這會非常有用。在使用如 OnGeneratePCMData 或 OnPopulateAudioData 等委派時，通常需要進行此轉換，因為它們輸出的是浮點PCM數據。

藍圖

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
	}));