public async Task Transcode(CancellationToken ct, IWaveStreamProvider stream, Stream targetStream)
{
using (var fileWriter = new NAudio.Wave.WaveFileWriter(targetStream, stream.WaveFormat))
{
await stream.Stream.CopyToAsync(fileWriter);
}
}
public static async Task TranscodeInternal(CancellationToken ct, IWaveStreamProvider stream, Stream targetStream)
{
using (var mp3Writer = new NAudio.Lame.LameMP3FileWriter(targetStream, stream.WaveFormat, NAudio.Lame.LAMEPreset.VBR_90))
{
await stream.Stream.CopyToAsync(mp3Writer, 81920, ct);
}
}
public async Task TranscodeInternal(CancellationToken ct, IWaveStreamProvider stream, Stream targetStream)
{
var tempFilename = Path.Combine(Path.GetTempPath(), GetTranscodedFileName(Guid.NewGuid().ToString() + ".extension"));
MediaFoundationEncoder.EncodeToMp3(stream, tempFilename, 320000);
using (var tempStream = new FileStream(tempFilename, FileMode.Open, FileAccess.Read))
{
await tempStream.CopyToAsync(targetStream, 81920, ct);
}
File.Delete(tempFilename);
}
public Task Transcode(CancellationToken ct, IWaveStreamProvider stream, Stream targetStream)
{
if (stream == null) throw new ArgumentNullException(nameof(stream));
if (targetStream == null) throw new ArgumentNullException(nameof(targetStream));
return TranscodeInternal(ct, stream, targetStream);
}
