c# - Wav 到 MP3 最后缺少 20% 的音频

Question

我已经构建了一个控制台应用程序，可以读取两种语言（英语和俄语）的文本文件，这样我就可以制作自己的音频课程。

一切正常，除了现在我已经修改它以使用 Naudio 将 Wav 音频流转换为 MP3，最后我丢失了大约 20% 的录音。

我已经运行代码来跟踪每次话语后内存流的容量，果然，它最后丢失了数据。

我怀疑它与在 Wav 流中创建的 RIFF 标头有关。

我会发布代码，如果我能弄清楚怎么做！

using System;
using System.Text;
using System.Speech.Synthesis;
using System.Speech.AudioFormat;
using System.IO;
using NAudio.Wave;
using NAudio.Lame;
using NAudio;
using System.Threading.Tasks;


namespace Immercia
{

    class Program
    {



    public static void ConvertWavStreamToMp3File(ref MemoryStream ms, string savetofilename)
    {
        //rewind to beginning of stream
        ms.Seek(0, SeekOrigin.Begin);

        using (var rdr = new WaveFileReader(ms))
        using (var wtr = new LameMP3FileWriter(savetofilename, rdr.WaveFormat, 128/* LAMEPreset.VBR_90*/))

        {
            rdr.CopyTo(wtr);

        }
    }


    public static void Main(string[] args)
    {
        Console.Title = "Immercia";

        MemoryStream ms = new MemoryStream();


        //Create two instances of speech Synthesizer, set voices, and volume -rate is set in the function below
        SpeechSynthesizer synthE = new SpeechSynthesizer();
        SpeechSynthesizer synthR = new SpeechSynthesizer();
        synthE.SelectVoice("Microsoft Anna");
        synthR.SelectVoice("IVONA 2 Tatyana OEM");
        //new SpeechAudioFormatInfo(22000, AudioBitsPerSample.Sixteen, AudioChannel.Mono);



        synthE.Volume = 100;
        synthR.Volume = 85;
        synthE.Rate = -4;
        synthE.SetOutputToWaveStream(ms);
        synthR.SetOutputToWaveStream(ms);



        //  Set up the input text file to be read, and the output .wav file to be created
        Console.WriteLine("Enter exact lesson name to be read (case sensitive), " +
                                                "do not include path or file extention");
        string LessonName = Console.ReadLine();

        //Console.WriteLine("Enter unique Wav File name to be created (case sensitive), " +
        //                                        "do not include path or file extention ");
        string WavFileName = LessonName;

        //The output mp3 file of the recorded audio
        string savetofilename = @"C:\RussianLessons\" + WavFileName + ".mp3";

        Console.OutputEncoding = Encoding.UTF8;

        /*Source file for text to speech. must be created with an asterix before the english, 
        and a 4 digit "pause time" entry before the russian in milliseconds i.e."1400"
        Creation note: file mus be saved as a txt file in unicode  UFT8 or UFT 16 to support cryllic.*/

        string[] lesson = File.ReadAllLines(@"C:\RussianLessons\" + LessonName + ".txt");

        //this fixes the problem of the MP3 not recording the first word/phrase of the lesson,but doesn't actually get recorded???? weird stuff.
        synthR.Speak("Здравствуйте");

        try
        {


            // Loop over strings.
            foreach (string word in lesson)
            {
                //Trim off english indicator asterix and create new string "english" for speaking. 
                if (word.Contains("*") == true)
                {
                    char trim = '*';
                    string english = word.Trim(trim);

                    //write english word to console
                    Console.WriteLine(english);

                    //speak english word

                    synthE.Speak(english);

                    //Test for debug of end file loss
                    Console.WriteLine(
                   "Capacity = {0}, Length = {1}, Position = {2}\n",
                    ms.Capacity.ToString(),
                    ms.Length.ToString(),
                    ms.Position.ToString());

                }
                if (word.Contains("#") == true)
                {

                    //Trim off pause time instructions to leave crylllic to be written to console
                    char[] charsToTrim = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '#' };
                    string TrimmedRussian = word.TrimStart(charsToTrim);

                    //extract pause time entry from the begining of the russian word string
                    string milli = word.Substring(0, 4);
                    string pause = string.Concat('"' + milli + "ms\"");

                    //create SSML string to allow for "pause time" to be read automatically by the speech synthesizer
                    string russian;
                    russian = "<speak version=\"1.0\"";
                    russian += " xmlns=\"http://www.w3.org/2001/10/synthesis \"";
                    russian += " xml:lang=\"ru-RU\">";
                    russian += TrimmedRussian;
                    russian += "<break time= ";
                    russian += pause;
                    russian += " />";
                    russian += "</speak>";

                    //Write russian word to console
                    Console.WriteLine(TrimmedRussian);

                    //speak russian word
                    synthR.Rate = -6;

                    synthR.SpeakSsml(russian);
                    //Test for debug of end file loss
                    Console.WriteLine(
                    "Capacity = {0}, Length = {1}, Position = {2}\n",
                     ms.Capacity.ToString(),
                     ms.Length.ToString(),
                     ms.Position.ToString());

                    synthR.Rate = -4;
                    // repeat russian word
                    synthR.SpeakSsml(russian);

                    //Test for debug of end file loss
                    Console.WriteLine(
                    "Capacity = {0}, Length = {1}, Position = {2}\n",
                     ms.Capacity.ToString(),
                     ms.Length.ToString(),
                     ms.Position.ToString());

                }
                /* if (word.Contains("end of file") == true)
                 {

                 synthR.Speak("До свидания, До свидания, До свидания");

                 }*/

            }

            //This is not being spoken???? Trying to fix the loss of 20% of the bytes from the end of the MP3.
            //Having synthR speak before the foreach fixed the loss of the first 20%....

            //synthR.Speak("Здравствуйте");

        }

        catch (FileNotFoundException)
        {
            // Write error.
            Console.WriteLine("Lesson file not found or spelt incorrectly, " +
               "please restart program and check the file name and remember it is case sensitive.");
        }



        //Test for debug of end file loss
        Console.WriteLine(
        "Capacity = {0}, Length = {1}, Position = {2}\n",
        ms.Capacity.ToString(),
        ms.Length.ToString(),
        ms.Position.ToString());



        ConvertWavStreamToMp3File(ref ms, savetofilename);

        ms.Close();

        //Stop fucking around with C# and learn Russian, NOW....
        Console.WriteLine("\n That is all, press any key to exit");
        Console.ReadKey();


    }

}

}

标签： c#mp3wavnaudio

Answer 1

我最终在 foreach 函数中添加了另一个语音事件。这不是我所希望的，但出于某种原因它起作用了。我确实记得读过有关“if”语句无法循环的内容，但我仍然怀疑它是 Wav 流中的 RIFF 标头。这是另一天的谜。–

if (word.Contains("end") == true)
                {
                    string millis = "1000";
                    string pauses = string.Concat('"' + millis + "ms\"");
                    //create SSML string to be read automatically by the 
speech synthesizer
                    string endfile;
                    endfile = "<speak version=\"1.0\"";
                    endfile += " xmlns=\"http://www.w3.org/2001/10/synthesis \"";
                    endfile += " xml:lang=\"ru-RU\">";
                    endfile += "до свидания";
                    endfile += "<break time= ";
                    endfile += pauses;
                    endfile += " />";
                    endfile += "</speak>";

                    //Write russian word to console
                    Console.WriteLine(endfile);

                    //speak russian word
                    synthR.Rate = -6;

                    synthR.SpeakSsml(endfile);

                    //Test for debug of end file loss
                    Console.WriteLine(
                    "Capacity = {0}, Length = {1}, Position = {2}\n",
                     ms.Capacity.ToString(),
                     ms.Length.ToString(),
                     ms.Position.ToString());

                    synthR.Rate = -4;
                    // repeat russian word
                    synthR.SpeakSsml(endfile);

                    //Test for debug of end file loss
                    Console.WriteLine(
                    "Capacity = {0}, Length = {1}, Position = {2}\n",
                     ms.Capacity.ToString(),
                     ms.Length.ToString(),
                     ms.Position.ToString());

                }