ffmpeg 转成MP3采样率8000

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.Diagnostics;
using System.IO;
using System.Threading;

namespace Win
{
public partial class Form1 : Form
{
public static string url="";
public Form1()
{
InitializeComponent();
}
static FileSystemWatcher watcher = new FileSystemWatcher();
/// <summary>
/// 初始化监听
/// </summary>
/// <param name="StrWarcherPath">需要监听的目录</param>
/// <param name="FilterType">需要监听的文件类型(筛选器字符串)</param>
/// <param name="IsEnableRaising">是否启用监听</param>
/// <param name="IsInclude">是否监听子目录</param>
private static void WatcherStrat(string StrWarcherPath, string FilterType, bool IsEnableRaising, bool IsInclude)
{
//初始化监听
watcher.BeginInit();
//设置监听文件类型
watcher.Filter = FilterType;
//设置是否监听子目录
watcher.IncludeSubdirectories = IsInclude;
//设置是否启用监听?
watcher.EnableRaisingEvents = IsEnableRaising;
//设置需要监听的更改类型(如:文件或者文件夹的属性,文件或者文件夹的创建时间;NotifyFilters枚举的内容)
watcher.NotifyFilter = NotifyFilters.Attributes | NotifyFilters.CreationTime | NotifyFilters.DirectoryName | NotifyFilters.FileName | NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.Security | NotifyFilters.Size;
//设置监听的路径
watcher.Path = StrWarcherPath;
//注册创建文件或目录时的监听事件
watcher.Created += new FileSystemEventHandler(watch_created);
//注册当指定目录的文件或者目录发生改变的时候的监听事件
watcher.Changed += new FileSystemEventHandler(watch_changed);
//注册当删除目录的文件或者目录的时候的监听事件
watcher.Deleted += new FileSystemEventHandler(watch_deleted);
//当指定目录的文件或者目录发生重命名的时候的监听事件
watcher.Renamed += new RenamedEventHandler(watch_renamed);
//结束初始化
watcher.EndInit();
}

/// <summary>
/// 创建文件或者目录时的监听事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void watch_created(object sender, FileSystemEventArgs e)
{
//事件内容
string fileName = e.FullPath;
string targetFileName = "";
WavConvertAmr.ConvertToMP3 toamr = new WavConvertAmr.ConvertToMP3();
try
{
if (!System.IO.Path.GetExtension(fileName).Equals(".mp3", StringComparison.CurrentCultureIgnoreCase))
{
targetFileName = e.FullPath.Substring(0, e.FullPath.LastIndexOf(".")) + ".mp3";
toamr.ConvertToAmr(System.Windows.Forms.Application.StartupPath, fileName, targetFileName);
}
//转换采样率
targetFileName = e.FullPath.Substring(0, e.FullPath.LastIndexOf(".")) + ".wav";
toamr.ConvertToAmr(System.Windows.Forms.Application.StartupPath, fileName, targetFileName);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
/// <summary>
/// 当指定目录的文件或者目录发生改变的时候的监听事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void watch_changed(object sender, FileSystemEventArgs e)
{
//事件内容
//MessageBox.Show("发生改变");
}
/// <summary>
/// 当删除目录的文件或者目录的时候的监听事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void watch_deleted(object sender, FileSystemEventArgs e)
{
//事件内容
}
/// <summary>
/// 当指定目录的文件或者目录发生重命名的时候的事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void watch_renamed(object sender, RenamedEventArgs e)
{
//事件内容
}
/// <summary>
/// 启动或者停止监听
/// </summary>
/// <param name="IsEnableRaising">True:启用监听,False:关闭监听</param>
private void WatchStartOrSopt(bool IsEnableRaising)
{
watcher.EnableRaisingEvents = IsEnableRaising;
}

private void button2_Click(object sender, EventArgs e)
{
Record re = new Record();
re.Show();
}
private void button1_Click_1(object sender, EventArgs e)
{
//url = System.AppDomain.CurrentDomain.BaseDirectory.Replace("WavConvertAmr\\Win\\bin\\Debug\\", "") + textBox1.Text;
try
{
url = System.AppDomain.CurrentDomain.BaseDirectory.Replace("Debug\\", "") + textBox1.Text;
WatcherStrat(url, "*", true, false);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
this.panel1.Visible = true;
MessageBox.Show("启动成功！");
}

private void button2_Click_1(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
if (open.ShowDialog() == DialogResult.OK)
{
string fileName = open.FileName;
string targetFileName = open.FileName.Substring(0, open.FileName.LastIndexOf(".")) + ".wav";
WavConvertAmr.ConvertToMP3 toamr = new WavConvertAmr.ConvertToMP3();
toamr.ConvertToAmr(System.Windows.Forms.Application.StartupPath, fileName, targetFileName);
MessageBox.Show("转换成功");

}
}

private void panel1_Paint(object sender, PaintEventArgs e)
{

}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace WavConvertAmr
{
public class ConvertToMP3
{

/// <summary>
/// 将Wav音频转成Amr手机音频
/// </summary>
/// <param name="applicationPath">ffmeg.exe文件路径</param>
/// <param name="fileName">WAV文件的路径(带文件名)</param>
/// <param name="targetFilName">生成目前amr文件路径（带文件名）</param>
public void ConvertToAmr(string applicationPath, string fileName, string targetFilName)
{
//string c = applicationPath + @"\ffmpeg.exe -y -i " + fileName + " -ar 8000 -ab 128 -ac 1 " + targetFilName;
string c = "\"" + applicationPath + @"\ffmpeg.exe" + "\"" + " -i  " + "\"" + fileName + "\"" + " -ar 8000  -y  " + "\"" + targetFilName + "\"";
Cmd(c);
}

/// <summary>
/// 执行Cmd命令
/// </summary>
private void Cmd(string c)
{
try
{
System.Diagnostics.Process process = new System.Diagnostics.Process();
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardInput = true;
process.Start();

process.StandardInput.WriteLine(c);
process.StandardInput.AutoFlush = true;
process.StandardInput.WriteLine("exit");
StreamReader reader = process.StandardOutput;//截取输出流
//process.WaitForExit();
}
catch
{ }
}
}
}