音频采样率转换问题

2010-11-01 09:57:13 730 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

python 音频文件采样率转换音频处理中经常会遇到各种采样率的文件，一般需要经过采样率的转换才能得到自己需要的采样率音频文件，下面提供一种音频转换方法，具体程序如下： def resample_rate(path,new_sample_rate = 16000): signal, sr = librosa.load(path, sr=None) wavfile = path.split('/')[-1] wavfile = wavfile.split('.')[0] file_name = wavfil 阅读详情

在程序里用acm进行音频转换，例如22050-》44100，44100-》22050
代码如下:



LPWAVEFORMATEX sourceFormat = (LPWAVEFORMATEX) new char [maxSize];

LPWAVEFORMATEX destFormat = (LPWAVEFORMATEX) new char [maxSize];

memset(sourceFormat, 0, maxSize);

memset(destFormat, 0, maxSize);

sourceFormat->wFormatTag = WAVE_FORMAT_PCM;

sourceFormat->nChannels = 2;

sourceFormat->nSamplesPerSec = 22050;

sourceFormat->wBitsPerSample = 16;

sourceFormat->cbSize = 0;

sourceFormat->nBlockAlign = 4;

sourceFormat->nAvgBytesPerSec = 22050* 4;



destFormat->wFormatTag = WAVE_FORMAT_PCM;

destFormat->nChannels = 2;

destFormat->nSamplesPerSec = 44100;

destFormat->wBitsPerSample = 16;

destFormat->cbSize = 0;

destFormat->nBlockAlign = 4;

destFormat->nAvgBytesPerSec = 44100* 4; 

HACMSTREAM hstr1;

		mmr = acmStreamOpen(&hstr1,

			NULL, // driver handle

			sourceFormat, // source format

			m_destFormat, // destination format

			NULL, // no filter

			NULL, // no callback

			0, // instance data (not used)

			ACM_STREAMOPENF_NONREALTIME);

					DWORD suggestedDestSize;

					suggestedDestSize = 0; 

					hr = acmStreamSize(hstr1, numFramesAvailable*pwfx->nBlockAlign, &suggestedDestSize, ACM_STREAMSIZEF_DESTINATION);



					BYTE* pDstData = new BYTE [dwDstBytes];

					ACMSTREAMHEADER shdr;

					memset(&shdr, 0, sizeof(shdr));

					shdr.cbStruct = sizeof(shdr);

					shdr.pbSrc = pData; //

					shdr.cbSrcLength = numFramesAvailable*pwfx->nBlockAlign;

					shdr.pbDst = pDstData; //

					shdr.cbDstLength = suggestedDestSize;



					mmr = acmStreamPrepareHeader(hstr1, &shdr, 0);

					mmr = acmStreamConvert(hstr1, &shdr, 0);



					......



					mmr = acmStreamUnprepareHeader(hstr1, &shdr, 0);



.....

现在的问题是从44100-》22050正常，但是从22050-》44100严重失真