public async Task <WavStream> ConvertAsync(Stream stream)
{
var section = configuration.GetSection("AudioToTextService.Core.WavAudioConverter");
var ffmpegPath = section["ffmpeg"];
using (var inputFile = await TempFileInfo.GenTempFileAsync(stream))
{
var outputFile = Path.ChangeExtension(Path.GetTempFileName(), ".wav");
var cmd = String.Format(ToWavCmdLine, inputFile.FileName, outputFile);
ProcessStartInfo psi = new ProcessStartInfo(ffmpegPath, cmd)
{
UseShellExecute = false,
CreateNoWindow = true,
WorkingDirectory = Directory.GetCurrentDirectory(),
RedirectStandardOutput = true,
RedirectStandardError = true
};
using (Process p = Process.Start(psi))
{
//* Read the output (or the error)
string ffmpegOutput = p.StandardOutput.ReadToEnd();
string ffmpegErrOutput = p.StandardError.ReadToEnd();
p.WaitForExit();
if (p.ExitCode != 0)
{
throw new Exception(ffmpegOutput + ffmpegErrOutput);
}
TimeSpan ts = ParseTimeFromFFMpegOutput(ffmpegErrOutput);
return(new WavStream(outputFile, FileMode.Open, FileAccess.Read, ts));
}
}
}
