C# windows media player 双窗口同步播放视频

需要用windows media player播放视频，两个摄像头从不同位置录像的视频，要一起播放，从某个给定时间段开始播放，速度为0.1

先上代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using WMPLib;namespace videotest
{public partial class Form1 : Form{bool flag2 = true;public double cp;//视频开始时间public string url = "";public string url2 = "";public double changdu;//需要显示的一个业务变量public string no;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){axWindowsMediaPlayer1.URL = url;axWindowsMediaPlayer1.Ctlcontrols.currentPosition = 0d;axWindowsMediaPlayer1.uiMode = "none";axWindowsMediaPlayer1.settings.autoStart = false;axWindowsMediaPlayer1.Ctlcontrols.play();axWindowsMediaPlayer2.URL = url2;axWindowsMediaPlayer2.Ctlcontrols.currentPosition = 0d;axWindowsMediaPlayer2.uiMode = "none";axWindowsMediaPlayer2.settings.autoStart = false;axWindowsMediaPlayer2.Ctlcontrols.play();timer1.Interval = 100;timer1.Enabled = true;label3.Text = cp.ToString();label4.Text = changdu.ToString();}private void button1_Click(object sender, EventArgs e){if (axWindowsMediaPlayer1.playState == WMPPlayState.wmppsPlaying && axWindowsMediaPlayer2.playState == WMPPlayState.wmppsPlaying){axWindowsMediaPlayer1.Ctlcontrols.pause();axWindowsMediaPlayer2.Ctlcontrols.pause();button1.Text = "播放";}else{axWindowsMediaPlayer1.Ctlcontrols.play();axWindowsMediaPlayer2.Ctlcontrols.play();button1.Text = "暂停";}}private void trackBar1_Scroll(object sender, EventArgs e){if (axWindowsMediaPlayer1.playState == WMPPlayState.wmppsPlaying && axWindowsMediaPlayer2.playState == WMPPlayState.wmppsPlaying){axWindowsMediaPlayer1.Ctlcontrols.currentPosition = trackBar1.Value/1000d;axWindowsMediaPlayer2.Ctlcontrols.currentPosition = trackBar1.Value/1000d;}}private void timer1_Tick(object sender, EventArgs e){if (axWindowsMediaPlayer1.playState == WMPPlayState.wmppsPlaying){trackBar1.Maximum = (int)(axWindowsMediaPlayer1.currentMedia.duration)*1000-1000;trackBar1.Minimum = 0;trackBar1.Value = (int)(axWindowsMediaPlayer1.Ctlcontrols.currentPosition)*1000;}if (axWindowsMediaPlayer1.playState == WMPPlayState.wmppsMediaEnded){trackBar1.Value = 0;button1.Text = "播放";}if (flag2&& axWindowsMediaPlayer1.playState == WMPPlayState.wmppsPlaying&& axWindowsMediaPlayer2.playState == WMPPlayState.wmppsPlaying){axWindowsMediaPlayer1.Ctlcontrols.currentPosition = cp;axWindowsMediaPlayer2.Ctlcontrols.currentPosition = cp;trackBar1.Value = (int)(cp*1000);axWindowsMediaPlayer1.Ctlcontrols.pause();axWindowsMediaPlayer2.Ctlcontrols.pause();axWindowsMediaPlayer1.settings.rate = 0.1;axWindowsMediaPlayer2.settings.rate = 0.1;button1.Text = "播放";flag2 = false;}label1.Text = axWindowsMediaPlayer1.currentMedia.durationString;label2.Text = TimeChange(axWindowsMediaPlayer1.Ctlcontrols.currentPosition);}private string TimeChange(double t){string res = "";int m = (int)Math.Floor(t / 60d);int s = (int)(t - m * 60d);res = m.ToString().PadLeft(2, '0')+":"+s.ToString().PadLeft(2, '0')+"."+ Math.Round(((t - m * 60d)-s),3)*1000;return res;}private void trackBar1_MouseUp(object sender, MouseEventArgs e){timer1.Enabled = true;}private void trackBar1_MouseDown(object sender, MouseEventArgs e){timer1.Enabled = false;}private void button3_Click(object sender, EventArgs e){axWindowsMediaPlayer1.Ctlcontrols.currentPosition += 3;axWindowsMediaPlayer2.Ctlcontrols.currentPosition += 3;}private void button4_Click(object sender, EventArgs e){axWindowsMediaPlayer1.Ctlcontrols.currentPosition -= 3;axWindowsMediaPlayer2.Ctlcontrols.currentPosition -= 3;}private void button2_Click(object sender, EventArgs e){axWindowsMediaPlayer1.Ctlcontrols.stop();axWindowsMediaPlayer2.Ctlcontrols.stop();trackBar1.Value = 0;}private void button5_Click(object sender, EventArgs e){axWindowsMediaPlayer1.settings.rate = 0.1;axWindowsMediaPlayer2.settings.rate = 0.1;}private void button6_Click(object sender, EventArgs e){axWindowsMediaPlayer1.settings.rate = 0.2;axWindowsMediaPlayer2.settings.rate = 0.2;}/// <param name="VideoName">视频文件pic/guiyu.mov</param>/// <param name="WidthAndHeight">图片的尺寸如:240*180</param>/// <param name="CutTimeFrame">开始截取的时间如:"1"</param>#region 从视频画面中截取一帧画面为图片public string GetPicFromVideo(string VideoName, string WidthAndHeight, string CutTimeFrame){string ffmpeg = @"ffmpeg.exe";string PicName = @"F:/"+no+".jpg";    //Server.MapPath(Guid.NewGuid().ToString().Replace("-", "") + ".jpg");System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;startInfo.Arguments = " -i " + VideoName + " -y -f image2 -ss " + CutTimeFrame + " -t 0.001 -s " + WidthAndHeight + " " + PicName;  //設定程式執行參數try{System.Diagnostics.Process.Start(startInfo);return PicName;}catch (Exception err){return err.Message;}}#endregionprivate void button7_Click(object sender, EventArgs e){GetPicFromVideo(url,"1024*768", cp.ToString());}}
}

后面还用 ffmpeg.exe来做了截图功能，ffmpeg文件三件套下载在我的其他链接里

ffmpeg三件套

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