用QuartzTypeLib.dll做过视频的朋友请进来帮忙看一下，winform程序。
用QuartzTypeLib.dll做视频如何获取该视频的时长呢，还有我用ProgressBar做视频的进度条，如何使他与视频同步，当视频缓冲时，他就停止。我是新手。
程序代码： public partial class mediaplayer : Form
{
private components;
private const int WM_APP = 0x8000;
private const int WM_GRAPHNOTIFY = WM_APP + 1;
private const int EC_COMPLETE = 0x01;
private const int WS_CHILD = 0x40000000;
private const int WS_CLIPCHILDREN = 0x2000000;
private FilgraphManager m_objFilterGraph = null;
private IBasicAudio m_objBasicAudio = null;
private IVideoWindow m_objVideoWindow = null;
private IMediaEvent m_objMediaEvent = null;
private IMediaEventEx m_objMediaEventEx = null;
private IMediaPosition m_objMediaPosition = null;
private IMediaControl m_objMediaControl = null;
enum MediaStatus { None, Stopped, Paused, Running };
private MediaStatus m_CurrentStatus = MediaStatus.None;
OpenFileDialog openFileDialog;
private int second = 0;
private int minute = 0;
//private int hour = 0;
private bool flag = false;
public mediaplayer()
{
InitializeComponent();
this.tsbt_open.Enabled = true;
this.tsbt_play.Enabled = false;
this.tsbt_stop.Enabled = false;
this.tsbt_pause.Enabled = false;
}
private Boolean Play = false;
private void PlayOrPause()
{
if (m_objMediaControl != null)
{
if (Play)
{
m_objMediaControl.Run();
m_CurrentStatus = MediaStatus.Running;
this.tsbt_play.Enabled = false;
this.tsbt_stop.Enabled = true;
this.tsbt_pause.Enabled = true;
this.flag = true;
Play = !Play;
this.toolStripButton1.Image = this.imageList1.Images[2];
}
else
{
m_objMediaControl.Pause();
m_CurrentStatus = MediaStatus.Paused;
this.tsbt_play.Enabled = true;
this.tsbt_stop.Enabled = true;
this.tsbt_pause.Enabled = false;
this.flag = false;
Play = !Play;
this.toolStripButton1.Image = this.imageList1.Images[4];
}
}
}
//播放
private void tsbt_play_Click(object sender, EventArgs e)
{
PlayOrPause();
}
//暂停文件
private void tsbt_pause_Click(object sender, EventArgs e)
{
PlayOrPause();
}
//停止播放
private void tsbt_close_Click(object sender, EventArgs e)
{
if (m_objMediaControl != null)
{
m_objMediaControl.Stop();
m_objMediaPosition.CurrentPosition = 0;
m_CurrentStatus = MediaStatus.Stopped;
CleanUp();
this.tsbt_play.Enabled = false;
this.tsbt_stop.Enabled = false;
this.tsbt_pause.Enabled = false;
this.toolStripButton1.Image = this.imageList1.Images[4];
this.flag = false;
this.lb_player2.Text = "播放时间：00:00";
this.trackBar1.Value = 0;
//this.Close();
}
}
private void tsbt_stop_Click(object sender, EventArgs e)
{
//m_objMediaControl.Stop();
//m_objMediaPosition.CurrentPosition = 0;
//m_CurrentStatus = MediaStatus.Stopped;
//CleanUp();
//this.tsbt_play.Enabled = false;
//this.tsbt_stop.Enabled = false;
//this.tsbt_pause.Enabled = false;
//this.flag = false;
}
//关闭
private void CleanUp()
{
if (m_objMediaControl != null)
m_objMediaControl.Stop();
m_CurrentStatus = MediaStatus.Stopped;
if (m_objMediaEventEx != null)
m_objMediaEventEx.SetNotifyWindow(0, 0, 0);
if (m_objVideoWindow != null)
{
m_objVideoWindow.Visible = 0;
m_objVideoWindow.Owner = 0;
}
if (m_objMediaControl != null) m_objMediaControl = null;
if (m_objMediaPosition != null) m_objMediaPosition = null;
if (m_objMediaEventEx != null) m_objMediaEventEx = null;
if (m_objMediaEvent != null) m_objMediaEvent = null;
if (m_objVideoWindow != null) m_objVideoWindow = null;
if (m_objBasicAudio != null) m_objBasicAudio = null;
if (m_objFilterGraph != null) m_objFilterGraph = null;
}
//清除临时图像
private void tsbt_open_Click(object sender, EventArgs e)
{
openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "Media Files|*.mkv;*.mpg;*.avi;*.wma;*.mov;*.wav;*.mp2;*.mp3|All Files|*.*";
if (DialogResult.OK == openFileDialog.ShowDialog())
{
CleanUp();
m_objFilterGraph = new FilgraphManager();
try
{
m_objFilterGraph.RenderFile(openFileDialog.FileName);
m_objBasicAudio = m_objFilterGraph as IBasicAudio;
m_objVideoWindow = m_objFilterGraph as IVideoWindow;
m_objVideoWindow.Owner = (int)pl_play.Handle;
m_objVideoWindow.WindowStyle = WS_CHILD | WS_CLIPCHILDREN;
m_objVideoWindow.SetWindowPosition(pl_play.ClientRectangle.Left,
pl_play.ClientRectangle.Top,
pl_play.ClientRectangle.Width,
pl_play.ClientRectangle.Height);
}
catch (Exception ex)
{
MessageBox.Show("该文件不能视频");
m_objVideoWindow = null;
}
m_objMediaEvent = m_objFilterGraph as IMediaEvent;
m_objMediaEventEx = m_objFilterGraph as IMediaEventEx;
m_objMediaEventEx.SetNotifyWindow((int)this.Handle, WM_GRAPHNOTIFY, 0);
m_objMediaPosition = m_objFilterGraph as IMediaPosition;
m_objMediaControl = m_objFilterGraph as IMediaControl;
//播放歌曲名称
this.Text = "DirectShow - [" + openFileDialog.FileName + "]";
//开始播放
m_objMediaControl.Run();
this.toolStripButton1.Image = this.imageList1.Images[2];
waveOutSetVolume(0, (System.UInt32)((double)0xffff * (double)this.tb_player1.Value / (double)(this.tb_player1.Maximum - this.tb_player1.Minimum)));
this.trackBar1.Maximum = 160;
//设置播放状态
m_CurrentStatus = MediaStatus.Running;
this.tsbt_play.Enabled = false;
this.tsbt_stop.Enabled = true;
this.tsbt_pause.Enabled = true;
flag = true;
// this.hour = 0;
this.second = 0;
this.minute = 0;
}