cscの作法 その401

概要

cscの作法、調べてみた。
練習問題、やってみた。

練習問題

動画ファイルの情報を取得する、ffmpegのフロントエンドを書け。

写真

サンプルコード

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Diagnostics;

class form1: Form {
	form1() {
		Text = "ffmpeg";
		ClientSize = new Size(200, 180);
		Label label = new Label();
		label.Location = new Point(20, 20);
		label.Text = "ファイル情報";
		label.Font = new Font("Geneva", 20, FontStyle.Regular);
		label.BackColor = Color.Azure;
		label.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
		label.AutoSize = true;
		Button btn1 = new Button();
		btn1.Location = new Point(50, 100);
		btn1.Text = "file";
		btn1.Click += btn1_Click;
		Controls.AddRange(new Control[] {
			label,
			btn1
		});
	}
	void btn1_Click(object sender, System.EventArgs e) {
		string fileContent = string.Empty;
		string filePath = string.Empty;
		using (OpenFileDialog openFileDialog = new OpenFileDialog())
		{
			openFileDialog.InitialDirectory = System.IO.Directory.GetCurrentDirectory();
			openFileDialog.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
			openFileDialog.FilterIndex = 2;
			openFileDialog.RestoreDirectory = true;
			if (openFileDialog.ShowDialog() == DialogResult.OK)
			{
				filePath = openFileDialog.FileName;
				//MessageBox.Show(filePath);
				Console.WriteLine(filePath);
				Process p = new Process();
				p.StartInfo.FileName = "ffmpeg.exe";
				p.StartInfo.Arguments = "-hide_banner -i " + filePath;
				p.StartInfo.RedirectStandardInput = true;
				p.StartInfo.RedirectStandardOutput = true;
				p.StartInfo.RedirectStandardError = true;
				p.StartInfo.CreateNoWindow = true;
				p.StartInfo.UseShellExecute = false;
				p.Start();
				string line;
				line = p.StandardOutput.ReadToEnd();
				line = p.StandardError.ReadToEnd();
				Console.WriteLine(line);
				line = line.Replace("At least one output file must be specified", "");
				MessageBox.Show(line);
				p.WaitForExit();
				//Console.WriteLine("ok1");
			}
		}
	}
	[STAThread]
	public static void Main() {
		Application.Run(new form1());
	}
}

以上。