我有一个使用语音合成的通用应用程序。在WP8.1下运行，它工作正常，但是一旦我尝试Win8.1，我开始变得奇怪的行为。实际的声音似乎只说了一次，但是，在第二次运行时（在同一个应用程序中），以下代码挂起：
string toSay = "hello";
System.Diagnostics.Debug.WriteLine("{0}: Speak {1}", DateTime.Now, toSay);
using (SpeechSynthesizer synth = new SpeechSynthesizer())
{
System.Diagnostics.Debug.WriteLine("{0}: After sythesizer instantiated", DateTime.Now);
var voiceStream = await synth.SynthesizeTextToStreamAsync(toSay);
System.Diagnostics.Debug.WriteLine("{0}: After voice stream", DateTime.Now);
调试语句的原因是代码似乎具有不确定性原则。也就是说，当我通过它进行调试时，代码会执行并传递SynthesizeTextToStreamAsync语句。但是，当删除breakpoits时，我只得到它之前的调试语句 - 永远不会是之后的那个。
我能推断出的最好的结果是，在第一次遇到不好的事情时（它确实声称完成并且实际上是第一次说话），然后它会卡住并且不能再玩了。完整代码看起来类似于：
string toSay = "hello";
System.Diagnostics.Debug.WriteLine("{0}: Speak {1}", DateTime.Now, toSay);
using (SpeechSynthesizer synth = new SpeechSynthesizer())
{
System.Diagnostics.Debug.WriteLine("{0}: After sythesizer instantiated", DateTime.Now);
var voiceStream = await synth.SynthesizeTextToStreamAsync(toSay);
System.Diagnostics.Debug.WriteLine("{0}: After voice stream", DateTime.Now);
MediaElement mediaElement;
mediaElement = rootControl.Children.FirstOrDefault(a => a as MediaElement != null) as MediaElement;
if (mediaElement == null)
{
mediaElement = new MediaElement();
rootControl.Children.Add(mediaElement);
}
mediaElement.SetSource(voiceStream, voiceStream.ContentType);
mediaElement.Volume = 1;
mediaElement.IsMuted = false;
var tcs = new TaskCompletionSource<bool>();
mediaElement.MediaEnded += (o, e) => { tcs.TrySetResult(true); };
mediaElement.MediaFailed += (o, e) => { tcs.TrySetResult(true); };
mediaElement.Play();
await tcs.Task;
答案 0 :(得分：0)
好的 - 我想我设法让这个工作......虽然我不确定为什么。
using (SpeechSynthesizer synth = new SpeechSynthesizer())
{
var voiceStream = await synth.SynthesizeTextToStreamAsync(toSay);
MediaElement mediaElement;
mediaElement = rootControl.Children.FirstOrDefault(a => a as MediaElement != null) as MediaElement;
if (mediaElement == null)
{
mediaElement = new MediaElement();
rootControl.Children.Add(mediaElement);
}
mediaElement.SetSource(voiceStream, voiceStream.ContentType);
mediaElement.Volume = 1;
mediaElement.IsMuted = false;
var tcs = new TaskCompletionSource<bool>();
mediaElement.MediaEnded += (o, e) => { tcs.TrySetResult(true); };
mediaElement.Play();
await tcs.Task;
// Removing the control seems to free up whatever is locking
rootControl.Children.Remove(mediaElement);
}
答案 1 :(得分：-3)
我不确定您使用的是哪种程序语言。不过这可能有所帮助。这是在C＃中，所以这可以帮助您引导您朝着正确的方向前进。
namespace Alexis
{
public partial class frmMain : Form
{
SpeechRecognitionEngine _recognizer = new SpeechRecognitionEngine();
SpeechSynthesizer Alexis = new SpeechSynthesizer();
SpeechRecognitionEngine startlistening = new SpeechRecognitionEngine();
DateTime timenow = DateTime.Now;
}
//other coding such as InitializeComponent and others.
//
//
//
//
private void frmMain_Load(object sender, EventArgs e)
{
_recognizer.SetInputToDefaultAudioDevice();
_recognizer.LoadGrammarAsync(new Grammar(new GrammarBuilder(new Choices(File.ReadAllLines(@"Default Commands.txt")))));
_recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(Shell_SpeechRecognized);
_recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(Social_SpeechRecognized);
_recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(Web_SpeechRecognized);
_recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(Default_SpeechRecognized);
_recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(AlarmClock_SpeechRecognized);
_recognizer.LoadGrammarAsync(new Grammar(new GrammarBuilder(new Choices(AlarmAM))));
_recognizer.LoadGrammarAsync(new Grammar(new GrammarBuilder(new Choices(AlarmPM))));
_recognizer.SpeechDetected += new EventHandler<SpeechDetectedEventArgs>(_recognizer_SpeechDetected);
_recognizer.RecognizeAsync(RecognizeMode.Multiple);
startlistening.SetInputToDefaultAudioDevice();
startlistening.LoadGrammarAsync(new Grammar(new GrammarBuilder(new Choices("alexis"))));
startlistening.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(startlistening_SpeechRecognized);
//other stuff here..... Then once you have this then you can generate a method then with your code as follows
//
//
//
private void Default_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
int ranNum;
string speech = e.Result.Text;
switch (speech)
{
#region Greetings
case "hello":
case "hello alexis":
timenow = DateTime.Now;
if (timenow.Hour >= 5 && timenow.Hour < 12)
{ Alexis.SpeakAsync("Goodmorning " + Settings.Default.User); }
if (timenow.Hour >= 12 && timenow.Hour < 18)
{ Alexis.SpeakAsync("Good afternoon " + Settings.Default.User); }
if (timenow.Hour >= 18 && timenow.Hour < 24)
{ Alexis.SpeakAsync("Good evening " + Settings.Default.User); }
if (timenow.Hour < 5)
{ Alexis.SpeakAsync("Hello " + Settings.Default.User + ", it's getting late"); }
break;
case "whats my name":
case "what is my name":
Alexis.SpeakAsync(Settings.Default.User);
break;
case "stop talking":
case "quit talking":
Alexis.SpeakAsyncCancelAll();
ranNum = rnd.Next(1, 2);
if (ranNum == 2)
{ Alexis.Speak("sorry " + Settings.Default.User); }
break;
}
}
而不是使用代码中的命令。我建议您使用文本文档。一旦你有了，那么你可以添加自己的命令，然后将其放入代码中。另请参阅System.Speech。
我希望这有助于让你走上正轨。