[英]How convert audio aiff to MP3 using Memory stream, NAudio and LameMP3
我尝试将 aiff 音频文件从 IFormFile 转换为 MP3 并将其上传到 Azure 存储。 我不明白 NAudio 的内存流是如何工作的……我不想在临时文件中复制文件,而只想使用流。 是否可以 ?
using (var retMs = new MemoryStream())
{
file.CopyTo(retMs);
var fileBytes = retMs.ToArray();
string s = Convert.ToBase64String(fileBytes);
using (var ms = new MemoryStream(fileBytes))
using (var reader = new AiffFileReader(ms))
using (var writer = new LameMP3FileWriter(retMs, reader.WaveFormat, 128))
{
reader.CopyTo(writer);
var result = await _blobService.UploadFileBlobAsync(
reader,
"audio/mpeg3",
"fr2.mp3");
toReturn = result.AbsoluteUri;
}
}
我认为下面的演示代码可能对您有所帮助。
using Azure.Storage.Blobs;
using NAudio.Lame;
using NAudio.Wave;
using System;
using System.IO;
namespace blobUpload
{
class Program
{
static void Main(string[] args)
{
string containerName = "<container name>";
string blobName = "test.mp3";
string storageConnStr = "<storage account conn str>";
var blobServiceClient = new BlobServiceClient(storageConnStr);
var blobClient = blobServiceClient.GetBlobContainerClient(containerName).GetBlobClient(blobName);
using (var retMs = new MemoryStream())
{
FileStream inputfileStream = new FileStream(@"<aiff file path>", FileMode.Open, FileAccess.Read);
inputfileStream.CopyTo(retMs);
var fileBytes = retMs.ToArray();
var bytes = ConvertWavToMp3(fileBytes);
blobClient.UploadAsync(new MemoryStream(bytes)).GetAwaiter().GetResult();
}
}
public static byte[] ConvertWavToMp3(byte[] wavFile)
{
using (var retMs = new MemoryStream())
using (var ms = new MemoryStream(wavFile))
using (var rdr = new AiffFileReader(ms))
using (var wtr = new LameMP3FileWriter(retMs, rdr.WaveFormat, 128))
{
rdr.CopyTo(wtr);
return retMs.ToArray();
}
}
}
我已经在我这边测试过,这个 .MP3 文件可以完美播放。
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