C# 调用FFmpeg 合并视频和音频

C#修改环境变量：

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string pathStr = System.Environment.GetEnvironmentVariable("Path", EnvironmentVariableTarget.Machine);             // 修改系统环境变量Path值             System.Environment.SetEnvironmentVariable("Path", pathStr + ";D:\\KK", EnvironmentVariableTarget.Machine);   //D:\\KK 是新加的值

　　

 

C#调用FFmpeg合并视频个音频：

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void Test()         {               string ffmpegPath = @"D:\Soft\ffmpeg\bin\ffmpeg.exe";  // 替换为你的FFmpeg可执行文件路径             string videoFile = @"C:\Users\Administrator\Desktop\work\1\idle.mp4";  // 替换为要合并的视频文件路径             string audioFile = @"D:\dl.mp3";  // 替换为要合并的音频文件路径             string outputFile = @"D:\ok.mp4";  // 替换为输出文件的保存路径和名称               string arguments = $"-i \"{videoFile}\" -i \"{audioFile}\" -c:v copy -c:a aac -map 0:v:0 -map 1:a:0 \"{outputFile}\"";               ProcessStartInfo psi = new ProcessStartInfo(ffmpegPath)             {                 Arguments = arguments,                 RedirectStandardOutput = true,                 RedirectStandardError = true,                 UseShellExecute = false,                 CreateNoWindow = true             };               Process process = new Process();             process.StartInfo = psi;             process.OutputDataReceived += (sender, eventArgs) =>             {                 //Title=("FFmpeg output: " + eventArgs.Data);             };             process.ErrorDataReceived += (sender, eventArgs) =>             {                // Title=("FFmpeg error: " + eventArgs.Data);             };               process.Start();             process.BeginOutputReadLine();             process.BeginErrorReadLine();             process.WaitForExit();               Title=("合并完成");           }