windows-phone-7 - 播放时出现问题，WP7 中录制的音频

Question

嗨开发人员，

如果我们将录制的声音保存为 mp3 文件。我们在打开文件时收到错误消息，因为 Windows Media Player 无法播放该文件。播放机可能不支持该文件类型或可能不支持用于压缩文件的编解码器。

请给出解决此问题的解决方案......

这是我的源代码

namespace Windows_Phone_Audio_Recorder
{
    public partial class MainPage : PhoneApplicationPage
    {
        MemoryStream m_msAudio = new MemoryStream();
        Microphone m_micDevice = Microphone.Default;
        byte[] m_baBuffer;
        SoundEffect m_sePlayBack;
        ViewModel vm = new ViewModel();
        long m_lDuration = 0;
        bool m_bStart = false;
        bool m_bPlay = false;
        private DispatcherTimer m_dispatcherTimer;

        public MainPage()
        {
            InitializeComponent();

            SupportedOrientations = SupportedPageOrientation.Portrait | SupportedPageOrientation.Landscape;            
            DataContext = vm;
            m_dispatcherTimer = new DispatcherTimer();

            m_dispatcherTimer.Interval = TimeSpan.FromTicks(10000);

            m_dispatcherTimer.Tick += frameworkDispatcherTimer_Tick;
            m_dispatcherTimer.Start();
            FrameworkDispatcher.Update();        
            //icBar.ItemsSource = vm.AudioData;
        }

        void frameworkDispatcherTimer_Tick(object sender, EventArgs e)
        {
            FrameworkDispatcher.Update();
        }        

        private void btnStart_Click(object sender, RoutedEventArgs e)
        {
            m_bStart = true;
            tbData.Text = "00:00:00";
            m_lDuration = 0;
            m_micDevice.BufferDuration = TimeSpan.FromMilliseconds(1000);
            m_baBuffer = new byte[m_micDevice.GetSampleSizeInBytes(m_micDevice.BufferDuration)];
            //m_micDevice.BufferReady += new EventHandler(m_Microphone_BufferReady);
            m_micDevice.BufferReady += new EventHandler<EventArgs>(m_Microphone_BufferReady);
            m_micDevice.Start();
        }

        void m_Microphone_BufferReady(object sender, EventArgs e)
        {
            m_micDevice.GetData(m_baBuffer);
              Dispatcher.BeginInvoke(()=>
              {
                    vm.LoadAudioData(m_baBuffer);
                    m_lDuration++;
                    TimeSpan tsTemp = new TimeSpan(m_lDuration * 10000000); 
                   tbData.Text = tsTemp.Hours.ToString().PadLeft(2, '0') + ":" + tsTemp.Minutes.ToString().PadLeft(2, '0') + ":" + tsTemp.Seconds.ToString().PadLeft(2, '0');
               }
                );
            //this.Dispatcher.BeginInvoke(new Action(() => vm.LoadAudioData(m_baBuffer))); 
            //this.Dispatcher.BeginInvoke(new Action(() => tbData.Text = m_baBuffer[0].ToString() + m_baBuffer[1].ToString() + m_baBuffer[2].ToString() + m_baBuffer[3].ToString()));
            m_msAudio.Write(m_baBuffer,0, m_baBuffer.Length);
        }

        private void btnStop_Click(object sender, RoutedEventArgs e)
        {
            if (m_bStart)
            {
                m_bStart = false;
                m_micDevice.Stop();
                ProgressPopup.IsOpen = true;
            }

            if (m_bPlay)
            {
                m_bPlay = false;
                m_sePlayBack.Dispose();
            }
        }

        private void btnPlay_Click(object sender, RoutedEventArgs e)
        {
            m_bPlay = true;
            m_sePlayBack = new SoundEffect(m_msAudio.ToArray(), m_micDevice.SampleRate, AudioChannels.Mono);
            m_sePlayBack.Play();
        }

        private void btnSave_Click(object sender, RoutedEventArgs e)
        {
            if (txtAudio.Text != "")
            {
                IsolatedStorageFile isfData = IsolatedStorageFile.GetUserStoreForApplication();
                string strSource = txtAudio.Text + ".wav";
                int nIndex = 0;
                while (isfData.FileExists(txtAudio.Text))
                {
                    strSource = txtAudio.Text + nIndex.ToString().PadLeft(2, '0') + ".wav";
                }

                IsolatedStorageFileStream isfStream = new IsolatedStorageFileStream(strSource, FileMode.Create, IsolatedStorageFile.GetUserStoreForApplication());
                isfStream.Write(m_msAudio.ToArray(), 0, m_msAudio.ToArray().Length);
                isfStream.Close();
            }
            this.Dispatcher.BeginInvoke(new Action(() => ProgressPopup.IsOpen = false));           
        }
    }
}

DotNet Weblineindia

我用于将音频上传到 PHP 服务器的源代码:

public void UploadAudio()
    {
        try
        {
            if (m_msAudio != null)
            {
                var fileUploadUrl = "uploadurl";

                var client = new HttpClient();
                m_msAudio.Position = 0;
                MultipartFormDataContent content = new MultipartFormDataContent();

                content.Add(new StreamContent(m_msAudio), "uploaded_file", strFileName);

                // upload the file sending the form info and ensure a result.it will throw an exception if the service doesn't return a valid successful status code

                client.PostAsync(fileUploadUrl, content)

               .ContinueWith((postTask) =>
               {
                   try
                   {
                       postTask.Result.EnsureSuccessStatusCode();
                       var respo = postTask.Result.Content.ReadAsStringAsync();
                       string[] splitChar = respo.Result.Split('"');
                       FilePath = splitChar[3].ToString();
                       Dispatcher.BeginInvoke(() => NavigationService.Navigate(new Uri("/VoiceSlider.xaml?FName=" + strFileName, UriKind.Relative)));                          
                   }
                   catch (Exception ex)
                   {
                      // Logger.Log.WriteToLogger(ex.Message);
                       MessageBox.Show("voice not uploaded" + ex.Message);
                   }

               });
            }
        }
        catch (Exception ex)
        {
            //Logger.Log.WriteToLogger(ex.Message + "Error occured while uploading image to server");
        }
    }

Answer 1

首先，Windows Phone 不允许录制 .mp3 文件。因此，您保存的 .mp3 文件将不会被 Windows Phone 播放器播放。

看看this.该演示适用于录制 .wav 文件。

如果您希望保存其他格式，如 .aac、.amr 则用户 AudioVideoCaptureDevice类(class)。