转码音频

转码格式

您可以使用相应的功能将音频从一种 RAW 或编码格式转码为另一种格式。

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
	}));

将浮点数组转换为字节数组

您可以将浮点数组（例如，32位浮点PCM数据）转换为字节数组。当您的音频数据需要以字节形式存在时，这非常有用，比如用于网络传输或某些处理系统时。此转换通常在使用像 OnGeneratePCMData 或 OnPopulateAudioData 这样的委托时是必需的，因为它们输出的是浮点PCM数据。

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
	}));