我创建了一个 WinForm 应用程序，其中包含一个 AxWMPLib.AxMediaPlayer，我在其中播放一些视频。我还必须在不同的线程中播放一些其他自定义声音。为此，我使用了 System.Media.SoundPlayer.PlaySync()。该线程循环播放几个声音文件。问题是当我暂停/停止视频时，按钮事件声音播放正常。但视频运行时，有时会跳过一些声音文件。而且它是随机发生的。 谁能解释一下这个问题以及如何解决它。我的意思是我怎样才能并行播放声音和视频。
视频在 UI 线程中播放，其他声音在不同线程中播放。请查看以下代码:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using ElectroQ;
using ElectroQServer1.Entities;
using WMPLib;
using System.Media;
using System.Windows.Media;
namespace ElectroQServer1
{
public partial class Form1 : Form
{
Thread dbListenerThread;
IWMPPlaylist playlist;
//string[] tokenNumber = { "A001", "B002", "C003", "D004","E005", "F006", "G007","HAMB" };
//string[] counterNumber = { "01", "02", "03", "04", "05", "06", "07", "MB" };
public Form1()
{
InitializeComponent();
//ResizeRedraw = true;
this.SetStyle(System.Windows.Forms.ControlStyles.DoubleBuffer, true);
this.WindowState = FormWindowState.Maximized;
//this.FormBorderStyle = FormBorderStyle.None;
//this.TopMost = true;
dbListenerThread = new Thread(RefreshQueueBoard);
dbListenerThread.Start();
}
/// <summary>
/// This method is used to prevent the flickering of the window.
/// </summary>
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x02000000; // Turn on WS_EX_COMPOSITED
return cp;
}
}
public void RefreshQueueBoard()
{
//Thread.Sleep(000);
while (true)
{
List<QueueData> lstQData = DA.GetAllQueueData(" where service_status_id = 2 ");
printToken(lstQData);
printCounter(lstQData);
playSound(lstQData);
Thread.Sleep(1000);
}
}
public void playSound(List<QueueData> lstQData)
{
foreach (QueueData qData in lstQData)
{
if (!qData.SoundPlayed)
{
string strSoundFile;
PlaySoundFIle(@"Sounds/TN.WAV");
foreach (char c in qData.ServiceQueueSerial)
{
strSoundFile = string.Format(@"Sounds/{0}.WAV", c);
PlaySoundFIle(strSoundFile);
}
PlaySoundFIle(@"Sounds/CN.WAV");
foreach (char c in qData.ServiceCounterID)
{
strSoundFile = string.Format(@"Sounds/{0}.WAV", c);
PlaySoundFIle(strSoundFile);
}
string strUpdateQuery = string.Format("UPDATE electro_queue SET sound_played = 1 WHERE service_queue_serial = '{0}'", qData.ServiceQueueSerial);
DA.UpdateQueueData(strUpdateQuery);
}
}
}
public void PlaySoundFIle(string strFile)
{
//string[] files = new string[4] { @"Sounds/TN.WAV", @"Sounds/CN.WAV", @"Sounds/TN.WAV", @"Sounds/CN.WAV"};
//WaveIO wa = new WaveIO();
//wa.Merge(files, @"tempfile.wav");
//MediaPlayer wowSound = new MediaPlayer(); //Initialize a new instance of MediaPlayer of name wowSound
//wowSound.Open(new Uri(@"tempfile.wav", UriKind.Relative)); //Open the file for a media playback
//wowSound.Play();
using (var soundPlayer = new SoundPlayer(strFile))
{
soundPlayer.PlaySync(); // can also use soundPlayer.Play() but it misses some sound file.
}
}
private void printToken(List<QueueData> lstQData)
{
if (InvokeRequired)
{
this.Invoke(new MethodInvoker(delegate
{
pnlQStat.Controls.Clear();
string dir;
//int xpos = 55;
//int ypos = 207;
int xpos = 10;
int ypos = 00;
//int k=0;
for (int i = 0; i < lstQData.Count; i++)
{
/* if (i == 4 || i == 8)
{
ypos = ypos - 360;
xpos = 675;
}*/
foreach (char c in lstQData[i].ServiceQueueSerial)
{
if (i == 0)
{
dir = "Resources/_" + c + ".bmp";
}
else
{
dir = "Resources/" + c + ".bmp";
}
createPicBox(dir, "pBox" + i, xpos, ypos);
xpos = xpos + 43;
}
ypos = ypos + 50;
xpos = 10;
}
}));
return;
}
}
private void printCounter(List<QueueData> lstQData)
{
if (InvokeRequired)
{
this.Invoke(new MethodInvoker(delegate
{
//int xpos = 415;
//int ypos = 207;
//int xpos = 292;
int xpos = 220;
int ypos = 00;
//int k=0;
for (int i = 0; i < lstQData.Count; i++)
{
/*if (i == 4 || i == 8)
{
ypos = ypos - 360;
xpos = 1035;
}
*/
foreach (char c in lstQData[i].ServiceCounterID)
{
string dir;
if (i == 0)
{
dir = "Resources/_" + c + ".bmp";
}
else
{
dir = "Resources/" + c + ".bmp";
}
//string dir = "Resources/" + c + ".bmp";
createPicBox(dir, "pBox" + i, xpos, ypos);
xpos = xpos + 63;
}
ypos = ypos + 50;
xpos = xpos - 63;
}
}));
return;
}
}
private void createPicBox(string directory, string name, int xposition, int yposition)
{
PictureBox picBox = new System.Windows.Forms.PictureBox();
picBox.Name = name;
picBox.Location = new System.Drawing.Point(xposition, yposition);
picBox.Size = new System.Drawing.Size(40, 50);
picBox.BackgroundImage = Image.FromFile(directory);
picBox.BackgroundImageLayout = ImageLayout.Stretch;
pnlQStat.Controls.Add(picBox);
}
private void Form1_Load(object sender, EventArgs e)
{
createPlayList();
//dbListenerThread.Abort(); // this line of code should be placed in onClosing Event.
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
dbListenerThread.Abort();
player.playlistCollection.remove(playlist);
}
private void createPlayList()
{
playlist = player.playlistCollection.newPlaylist("mpl");
playlist.appendItem(player.newMedia(@"E:\SONGS\teri-meri-promo-Muskurahat.Com.wmv"));
playlist.appendItem(player.newMedia(@"E:\MOVZZZ\English\The Kid\THE KID FILM_1_0001.avi"));
player.currentPlaylist = playlist;
}
private void btnPlay_Click(object sender, EventArgs e)
{
// player.URL = @"E:\MOVZZZ\English\The Kid\THE KID FILM_1_0001.avi";
player.Ctlcontrols.play();
}
private void btnStop_Click(object sender, EventArgs e)
{
player.Ctlcontrols.stop();
}
}
}
我的目标是顺序播放循环的声音文件，同时并行播放视频。
最佳答案
您不应将 SoundPlayer 用于此目的； SoundPlayer 是一个轻量级、方便的类，用于在应用程序中偶尔播放偶然的声音。如果音频子系统中发生其他事情(例如播放视频)，它偶尔会跳过声音。这是a good sample that shows how to use the low-level waveOutOpen API for playing sounds .
关于winforms - 使用 System.Media.SoundPlayer.PlaySync() 和 AxWindowsMediaPlayer 并行播放声音，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15876760/