Process ffmpeg = new Process();
ffmpeg.StartInfo.FileName = "ffmpeg.exe";
ffmpeg.StartInfo.Arguments = "-y -i " + fileName + " -vf fps=" + frameRate + ",scale=240:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse -loop 0 -ss 00:00:00 -t " + duration + " " + outputFilePath;
ffmpeg.StartInfo.UseShellExecute = false;
ffmpeg.StartInfo.RedirectStandardOutput = true;
ffmpeg.StartInfo.CreateNoWindow = true; // 隐藏命令提示符窗口
ffmpeg.StartInfo.WindowStyle = ProcessWindowStyle.Hidden; // 隐藏命令提示符窗口
ffmpeg.Start();
// 等待转换完成
ffmpeg.WaitForExit();
"-y -i "+ escapedInputFilePath + " -vf fps=" 其中-vf前面一定要有一个空格,找了两天,这点小问题都没发现