C# ファイル検索+指定秒数でサムネイル作成(FFmpeg)

以前､fenrir(B@r09u3 Style Op.2)の代替として自分用に作成した検索ソフトにサムネイル機能を追加｡

※追記(ファイル添付)

Release20241118

使い方
･解凍後､ffmpeg.exeをフォルダの中に保存｡(サムネイル表示しないなら不要)
･scan.txtの中に検索したいパスを記入｡(複数行可)
･CreateIndex.exeを実行｡
･FileSearch.exeを実行｡
･複数検索はバーティカルバー(|)で区切る｡AND検索｡
･検索結果のリストボックス上：ファイル名をダブルクリックで直接開く｡Ctrl+ダブルクリックでフォルダを開く｡
･テキストボックス上：Ctrl+Enterで､動画ファイルのサムネイル表示｡(数字入力のダイアログは何秒目のサムネイルにするか指定)
･サムネイル上：サムネイルをダブルクリックで直接開く｡Ctrl+ダブルクリックでフォルダを開く｡

C# ファイル検索(インクリメンタルサーチ)

C# 指定秒数でサムネイル作成②

指定フォルダ以下のファイルをインデックスしておき、インクリメンタルサーチの一覧をもとにFFmpegでサムネイルを作成する。

CreateThumbnail1()はUIの部分だけ固まらないようにしているが、サムネイルの作成は並列化していない。CreateThumbnail2()はサムネイルの作成まで並列化している。

using System;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using System.Xml.Serialization;

namespace FileSearch
{
    public partial class Form1 : Form
    {
        string RemoteIndexPath = Application.StartupPath + @"\remote_index_path.txt";
        string IndexPath = Application.StartupPath + @"\index.dat";

        List<string> RawItems = new List<string>();
        System.Collections.Concurrent.ConcurrentBag<string> FilterItems = new System.Collections.Concurrent.ConcurrentBag<string>();

        List<SubForm> Children = new List<SubForm>();

        int VisibleCount = 1000;
        int RawItemCount = 0;
        string WriteTime = "";
        string Needle = "";

        object LockObject = new object();
        bool IsExit = true;

        public Form1()
        {
            InitializeComponent();

            if (!IndexLoad()) return;

            LoadPosition();

            var delayExecute = new DelayExecute();
            delayExecute.Execute += (s, e) => SetupDatasource();

            textBox1.TextChanged += (s, e) =>
            {
                lock (LockObject)
                {
                    IsExit = false;
                }
                Needle = textBox1.Text;
                delayExecute.ReserveExecute();
            };

            textBox1.KeyDown += (s, e) => OpenSubForm(s, e);
            listBox1.MouseDoubleClick += (s, e) => OpenFile(s, e);
            
            this.SizeChanged += (s, e) =>
            {
                if (this.WindowState == FormWindowState.Minimized || this.WindowState == FormWindowState.Maximized) return;
                SavePosition();
            };

            this.FormClosing += (s, e) =>
            {
                if (Children.Count > 0)
                {
                    MessageBox.Show("フォームを全て閉じてください。");
                    e.Cancel = true;
                    return;
                }

                lock (LockObject)
                {
                    if (!IsExit) e.Cancel = true;
                }
            };
        }

        private void OpenSubForm(object sender, KeyEventArgs e)
        {
            lock (LockObject)
            {
                if (!IsExit) return;
            }

            if (FilterItems.Count == 0) return;

            if (e.Control && e.KeyCode == Keys.Enter)
            {
                string startTime = "0";

                var input = new InputBox();
                input.StartPosition = FormStartPosition.Manual;
                input.Left = DesktopLocation.X + 10;
                input.Top = DesktopLocation.Y + 10;
                input.ShowDialog();
                
                if (input.IsClick)
                {
                    int.TryParse(input.Value, out int result);
                    startTime = result.ToString();
                }

                var f = new SubForm(textBox1.Text, new List<string>(FilterItems), startTime);

                string handle = Guid.NewGuid().ToString("N");
                f.Id = handle;

                f.FormClosed += (ss, ee) =>
                {
                    Children = new List<SubForm>(Children.Where(x => x.Id != handle));
                };

                Children.Add(f);
                f.Show();
            }
        }

        private bool IndexLoad()
        {
            string remoteIndexPath = "";
            if (File.Exists(RemoteIndexPath)) 
            {
                remoteIndexPath = File.ReadAllText(RemoteIndexPath);
            }

            if (!File.Exists(IndexPath) && !File.Exists(remoteIndexPath)) // ローカル、リモートにない場合
            {
                MessageBox.Show("インデックスファイルが見つかりませんでした。");
                return false;
            }
            else if (File.Exists(IndexPath) && !File.Exists(remoteIndexPath)) // ローカルにあって、リモートにない場合
            {
                RawItems = File.ReadAllLines(IndexPath).ToList();
                RawItemCount = RawItems.Count();
                WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");
            }
            else if (!File.Exists(IndexPath) && File.Exists(remoteIndexPath)) // ローカルになくて、リモートにある場合
            {
                File.Copy(remoteIndexPath, IndexPath);
                RawItems = File.ReadAllLines(IndexPath).ToList();
                RawItemCount = RawItems.Count();
                WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");
            }
            else if (File.Exists(IndexPath) && File.Exists(remoteIndexPath)) // ローカル、リモートにある場合
            {
                if (File.GetLastWriteTime(IndexPath) < File.GetLastWriteTime(remoteIndexPath)) // リモートの方が最新の場合
                { 
                    if (DialogResult.Yes == MessageBox.Show("最新のインデックスファイルが存在します。更新しますか？","", MessageBoxButtons.YesNo))
                    {
                        File.Copy(remoteIndexPath, IndexPath, true);
                    }
                    RawItems = File.ReadAllLines(IndexPath).ToList();
                    RawItemCount = RawItems.Count();
                    WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");
                }
                else // ローカルの方が最新の場合
                {
                    RawItems = File.ReadAllLines(IndexPath).ToList();
                    RawItemCount = RawItems.Count();
                    WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");
                }
            }
            return true;
        }

        private void SetupDatasource()
        {
            var stopwatch = new Stopwatch();
            stopwatch.Start();

            IEnumerable<string> items = new List<string>();
            
            if (Needle == "")
            {
                items = RawItems.Take(VisibleCount);
            }
            else
            {
                List<string> tmpList = new List<string>(RawItems);

                foreach (string tmpString in Needle.Split('|'))
                {
                    tmpList = tmpList.AsParallel().Where(x => x.ToLower().Contains(tmpString.ToLower())).ToList();
                }
                items = tmpList.Take(VisibleCount);
            }

            var itemClassList = new System.Collections.Concurrent.ConcurrentBag<ItemClass>();
            FilterItems = new System.Collections.Concurrent.ConcurrentBag<string>();

            System.Threading.Tasks.Parallel.ForEach(items, item =>
            {
                itemClassList.Add(new ItemClass()
                {
                    DisplayItemPath = Path.GetFileName(item) + " . . . ■" + Path.GetDirectoryName(item),
                    ItemPath = item
                });
                FilterItems.Add(item);
            });

            stopwatch.Stop();

            Invoke(new Action(() => {
                listBox1.DataSource = itemClassList.ToList();
                listBox1.DisplayMember = "DisplayItemPath";
                Text = items.Count() + "/" + RawItemCount + "件表示 (" + stopwatch.ElapsedMilliseconds.ToString() + "ms)：" + WriteTime + "インデックス";
            }));

            lock (LockObject)
            {
                IsExit = true;
            }
        }

        private void OpenFile(object sender, MouseEventArgs e)
        {
            if (listBox1.SelectedItem == null) return;

            var itemPath = ((ItemClass)listBox1.SelectedItem).ItemPath;

            if (!File.Exists(itemPath))
            {
                MessageBox.Show("ファイルを開くことができませんでした。");
                return;
            } 

            if (ModifierKeys == Keys.Control)
            {
                var info = new ProcessStartInfo("explorer.exe");
                info.Arguments = $"/select, \"{itemPath}\"";
                Process.Start(info);
            }
            else
            {
                Process.Start(itemPath);
            }
        }

        private void LoadPosition()
        {
            if (!File.Exists(Application.StartupPath + @"\dat.xml")) return;

            this.StartPosition = FormStartPosition.Manual;

            XmlSerializer xs = new XmlSerializer(typeof(List<int>));
            using (StreamReader sr = new StreamReader(Application.StartupPath + @"\dat.xml", Encoding.UTF8))
            {
                try
                {
                    List<int> items = (List<int>)xs.Deserialize(sr);
                    
                    if (0 > (int)items[2])
                    {
                        this.StartPosition = FormStartPosition.WindowsDefaultLocation;
                        return;
                    }

                    this.Width = (int)items[0];
                    this.Height = (int)items[1];
                    this.Top = (int)items[2];
                    this.Left = (int)items[3];
                }
                catch
                {
                    this.StartPosition = FormStartPosition.WindowsDefaultLocation;
                }
            }
        }

        private void SavePosition()
        {
            if (this.WindowState == FormWindowState.Maximized) return;

            XmlSerializer xs = new XmlSerializer(typeof(List<int>));
            using (StreamWriter sw = new StreamWriter(Application.StartupPath + @"\dat.xml", false, Encoding.UTF8))
            {
                List<int> items = new List<int>();

                items.Add(this.Width);
                items.Add(this.Height);
                items.Add(this.Top);
                items.Add(this.Left);

                xs.Serialize(sw, items);
            }
        }
    }

    struct ItemClass
    {
        public string DisplayItemPath { set; get; }
        public string ItemPath { set; get; }
    }

    class DelayExecute
    {
        public event EventHandler Execute; // SetupDatasource()を登録
        private int DelayTime = 500;

        System.Threading.Timer Timer;

        public DelayExecute()
        {
            Timer = new System.Threading.Timer(x => {
                Execute(this, EventArgs.Empty);
            });
        }

        public void ReserveExecute() // TextChangeで発火
        {
            Timer.Change(DelayTime, Timeout.Infinite); // Timeout.Infiniteは一度だけ呼ぶ
        }
    }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

using System;

using System.Collections.Generic;

using System.Data;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading;

using System.Windows.Forms;

using System.Xml.Serialization;

namespace FileSearch

{

public partial class Form1 : Form

{

string RemoteIndexPath = Application.StartupPath + @"\remote_index_path.txt";

string IndexPath = Application.StartupPath + @"\index.dat";

List<string> RawItems = new List<string>();

System.Collections.Concurrent.ConcurrentBag<string> FilterItems = new System.Collections.Concurrent.ConcurrentBag<string>();

List<SubForm> Children = new List<SubForm>();

int VisibleCount = 1000;

int RawItemCount = 0;

string WriteTime = "";

string Needle = "";

object LockObject = new object();

bool IsExit = true;

public Form1()

{

InitializeComponent();

if (!IndexLoad()) return;

LoadPosition();

var delayExecute = new DelayExecute();

delayExecute.Execute += (s, e) => SetupDatasource();

textBox1.TextChanged += (s, e) =>

{

lock (LockObject)

{

IsExit = false;

}

Needle = textBox1.Text;

delayExecute.ReserveExecute();

};

textBox1.KeyDown += (s, e) => OpenSubForm(s, e);

listBox1.MouseDoubleClick += (s, e) => OpenFile(s, e);

this.SizeChanged += (s, e) =>

{

if (this.WindowState == FormWindowState.Minimized || this.WindowState == FormWindowState.Maximized) return;

SavePosition();

};

this.FormClosing += (s, e) =>

{

if (Children.Count > 0)

{

MessageBox.Show("フォームを全て閉じてください。");

e.Cancel = true;

return;

}

lock (LockObject)

{

if (!IsExit) e.Cancel = true;

}

};

}

private void OpenSubForm(object sender, KeyEventArgs e)

{

lock (LockObject)

{

if (!IsExit) return;

}

if (FilterItems.Count == 0) return;

if (e.Control && e.KeyCode == Keys.Enter)

{

string startTime = "0";

var input = new InputBox();

input.StartPosition = FormStartPosition.Manual;

input.Left = DesktopLocation.X + 10;

input.Top = DesktopLocation.Y + 10;

input.ShowDialog();

if (input.IsClick)

{

int.TryParse(input.Value, out int result);

startTime = result.ToString();

}

var f = new SubForm(textBox1.Text, new List<string>(FilterItems), startTime);

string handle = Guid.NewGuid().ToString("N");

f.Id = handle;

f.FormClosed += (ss, ee) =>

{

Children = new List<SubForm>(Children.Where(x => x.Id != handle));

};

Children.Add(f);

f.Show();

}

private bool IndexLoad()

{

string remoteIndexPath = "";

if (File.Exists(RemoteIndexPath))

{

remoteIndexPath = File.ReadAllText(RemoteIndexPath);

}

if (!File.Exists(IndexPath) && !File.Exists(remoteIndexPath)) // ローカル、リモートにない場合

{

MessageBox.Show("インデックスファイルが見つかりませんでした。");

return false;

}

else if (File.Exists(IndexPath) && !File.Exists(remoteIndexPath)) // ローカルにあって、リモートにない場合

{

RawItems = File.ReadAllLines(IndexPath).ToList();

RawItemCount = RawItems.Count();

WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");

}

else if (!File.Exists(IndexPath) && File.Exists(remoteIndexPath)) // ローカルになくて、リモートにある場合

{

File.Copy(remoteIndexPath, IndexPath);

RawItems = File.ReadAllLines(IndexPath).ToList();

RawItemCount = RawItems.Count();

WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");

}

else if (File.Exists(IndexPath) && File.Exists(remoteIndexPath)) // ローカル、リモートにある場合

{

if (File.GetLastWriteTime(IndexPath) < File.GetLastWriteTime(remoteIndexPath)) // リモートの方が最新の場合

{

if (DialogResult.Yes == MessageBox.Show("最新のインデックスファイルが存在します。更新しますか？","", MessageBoxButtons.YesNo))

{

File.Copy(remoteIndexPath, IndexPath, true);

}

RawItems = File.ReadAllLines(IndexPath).ToList();

RawItemCount = RawItems.Count();

WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");

}

else // ローカルの方が最新の場合

{

RawItems = File.ReadAllLines(IndexPath).ToList();

RawItemCount = RawItems.Count();

WriteTime = File.GetLastWriteTime(IndexPath).ToString("yyyy/MM/dd HH:mm:ss");

}

return true;

}

private void SetupDatasource()

{

var stopwatch = new Stopwatch();

stopwatch.Start();

IEnumerable<string> items = new List<string>();

if (Needle == "")

{

items = RawItems.Take(VisibleCount);

}

else

{

List<string> tmpList = new List<string>(RawItems);

foreach (string tmpString in Needle.Split('|'))

{

tmpList = tmpList.AsParallel().Where(x => x.ToLower().Contains(tmpString.ToLower())).ToList();

}

items = tmpList.Take(VisibleCount);

}

var itemClassList = new System.Collections.Concurrent.ConcurrentBag<ItemClass>();

FilterItems = new System.Collections.Concurrent.ConcurrentBag<string>();

System.Threading.Tasks.Parallel.ForEach(items, item =>

{

itemClassList.Add(new ItemClass()

{

DisplayItemPath = Path.GetFileName(item) + " . . . ■" + Path.GetDirectoryName(item),

ItemPath = item

});

FilterItems.Add(item);

});

stopwatch.Stop();

Invoke(new Action(() => {

listBox1.DataSource = itemClassList.ToList();

listBox1.DisplayMember = "DisplayItemPath";

Text = items.Count() + "/" + RawItemCount + "件表示 (" + stopwatch.ElapsedMilliseconds.ToString() + "ms)：" + WriteTime + "インデックス";

}));

lock (LockObject)

{

IsExit = true;

}

private void OpenFile(object sender, MouseEventArgs e)

{

if (listBox1.SelectedItem == null) return;

var itemPath = ((ItemClass)listBox1.SelectedItem).ItemPath;

if (!File.Exists(itemPath))

{

MessageBox.Show("ファイルを開くことができませんでした。");

return;

}

if (ModifierKeys == Keys.Control)

{

var info = new ProcessStartInfo("explorer.exe");

info.Arguments = $"/select, \"{itemPath}\"";

Process.Start(info);

}

else

{

Process.Start(itemPath);

}

private void LoadPosition()

{

if (!File.Exists(Application.StartupPath + @"\dat.xml")) return;

this.StartPosition = FormStartPosition.Manual;

XmlSerializer xs = new XmlSerializer(typeof(List<int>));

using (StreamReader sr = new StreamReader(Application.StartupPath + @"\dat.xml", Encoding.UTF8))

{

try

{

List<int> items = (List<int>)xs.Deserialize(sr);

if (0 > (int)items[2])

{

this.StartPosition = FormStartPosition.WindowsDefaultLocation;

return;

}

this.Width = (int)items[0];

this.Height = (int)items[1];

this.Top = (int)items[2];

this.Left = (int)items[3];

}

catch

{

this.StartPosition = FormStartPosition.WindowsDefaultLocation;

}

private void SavePosition()

{

if (this.WindowState == FormWindowState.Maximized) return;

XmlSerializer xs = new XmlSerializer(typeof(List<int>));

using (StreamWriter sw = new StreamWriter(Application.StartupPath + @"\dat.xml", false, Encoding.UTF8))

{

List<int> items = new List<int>();

items.Add(this.Width);

items.Add(this.Height);

items.Add(this.Top);

items.Add(this.Left);

xs.Serialize(sw, items);

}

struct ItemClass

{

public string DisplayItemPath { set; get; }

public string ItemPath { set; get; }

}

class DelayExecute

{

public event EventHandler Execute; // SetupDatasource()を登録

private int DelayTime = 500;

System.Threading.Timer Timer;

public DelayExecute()

{

Timer = new System.Threading.Timer(x => {

Execute(this, EventArgs.Empty);

});

}

public void ReserveExecute() // TextChangeで発火

{

Timer.Change(DelayTime, Timeout.Infinite); // Timeout.Infiniteは一度だけ呼ぶ

}

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Linq;

namespace FileSearch
{
    public partial class SubForm : Form
    {
        public string Id { set; get; }

        object LockObject = new object();
        bool IsExit = false;

        public SubForm(string needle, List<string> filterItems, string startTime)
        {
            InitializeComponent();

            var tokenSource = new CancellationTokenSource();
            var token = tokenSource.Token;

            listView1.MultiSelect = false;
            
            listView1.MouseDoubleClick += (s, e) =>
            {
                string itemPath = listView1.SelectedItems[0].SubItems[1].Text;

                if (ModifierKeys == Keys.Control)
                {
                    var info = new ProcessStartInfo("explorer.exe");
                    info.Arguments = $"/select, \"{itemPath}\"";
                    Process.Start(info);
                }
                else
                {
                    Process.Start(itemPath);
                }
            };

            this.FormClosing += (s, e) =>
            {
                lock (LockObject)
                {
                    if (!IsExit)
                    {
                        tokenSource.Cancel();
                        e.Cancel = true;
                    }
                }
            };
            CreateThumbnail2(needle, filterItems, startTime, token);
        }

        private async void CreateThumbnail2(string needle, List<string> filterItems, string startTime, CancellationToken token)
        {
            ImageList il = new ImageList();
            il.ImageSize = new Size(200, 200);
            il.ColorDepth = ColorDepth.Depth32Bit;
            listView1.LargeImageList = il;

            var listItems = new System.Collections.Concurrent.ConcurrentBag<ListViewItem>();

            var tasks = new List<Task>();

            foreach (string f in filterItems)
            {
                if (!File.Exists(f)) continue;
                if (Path.GetExtension(f) != ".mp4" && Path.GetExtension(f) != ".mkv" && Path.GetExtension(f) != ".flv") continue;

                var t = Task.Run(() =>
                {
                    if (token.IsCancellationRequested) return;
                    while (!IsHandleCreated) { }

                    int itemCount = 0;

                    string option = " -ss " + startTime + " -i \"" + f + "\" -vframes 1 -f image2 pipe:1";
                    ProcessStartInfo ps = new ProcessStartInfo(Application.StartupPath + @"\ffmpeg.exe", option);
                    ps.RedirectStandardOutput = true;
                    ps.CreateNoWindow = true;
                    ps.UseShellExecute = false;
                    
                    using (Process p = new Process())
                    {
                        try
                        {
                            p.StartInfo = ps;
                            if (!p.Start()) throw new Exception();

                            using (Image img = Image.FromStream(Stream.Synchronized(p.StandardOutput.BaseStream)))
                            {
                                Image thumb = img.GetThumbnailImage(200, 200, null, IntPtr.Zero);
                                Invoke(new Action(() =>
                                {
                                    il.Images.Add(thumb);
                                    itemCount = il.Images.Count;
                                    
                                }));
                            }
                        }
                        catch (Exception)
                        {
                            Image img = new Bitmap(200, 200);
                            Invoke(new Action(() =>
                            {
                                il.Images.Add(img);
                                itemCount = il.Images.Count;
                            }));
                        }
                    }

                    string fileName = FileNameComp(Path.GetFileName(f), FileSizeUnit(new FileInfo(f).Length));

                    var item = new ListViewItem(fileName, itemCount-1);
                    item.SubItems.Add(f);
                    listItems.Add(item);

                    Invoke((Action)(() =>
                    {
                        Text = "集計 (" + itemCount.ToString() + "件) : " + startTime +  "秒 : " + needle;
                    }));

                }, token);

                tasks.Add(t);
            }

            try
            {
                await Task.WhenAll(tasks.ToArray());
            }
            catch { }

            listView1.Items.AddRange(listItems.ToArray());
            Text = "完了 (" + il.Images.Count.ToString() + "件) : " + startTime + "秒 : "+ needle;

            lock (LockObject)
            {
                IsExit = true;
            }
        }

        private async void CreateThumbnail1(string needle, List<string> filterItems, CancellationToken token)
        {
            ImageList il = new ImageList();
            il.ImageSize = new Size(200, 200);
            il.ColorDepth = ColorDepth.Depth32Bit;
            listView1.LargeImageList = il;

            int itemIndex = 0;

            await Task.Run(() => {

                while (!IsHandleCreated) { }
                
                foreach (string f in filterItems)
                {
                    if (token.IsCancellationRequested) break;
                    if (!File.Exists(f)) continue;
                    if (Path.GetExtension(f) != ".mp4" && Path.GetExtension(f) != ".mkv" && Path.GetExtension(f) != ".flv") continue;

                    string ss = "60";
                    string option = " -ss " + ss + " -i \"" + f + "\" -vframes 1 -f image2 pipe:1";

                    ProcessStartInfo ps = new ProcessStartInfo(Application.StartupPath + @"\ffmpeg.exe", option);
                    ps.RedirectStandardOutput = true;
                    ps.CreateNoWindow = true;
                    ps.UseShellExecute = false;

                    using (Process p = new Process())
                    {
                        try
                        {
                            p.StartInfo = ps;
                            if (!p.Start()) throw new Exception();

                            using (Image img = Image.FromStream(p.StandardOutput.BaseStream))
                            {
                                Image thumb = img.GetThumbnailImage(200, 200, null, IntPtr.Zero);
                                Invoke(new Action(() => {
                                    il.Images.Add(thumb);
                                }));
                            }
                        }
                        catch (Exception)
                        {
                            Image img = new Bitmap(200, 200);
                            Invoke(new Action(() => {
                                il.Images.Add(img);
                            }));
                        }
                    }

                    string fileName = FileNameComp(Path.GetFileName(f), FileSizeUnit(new FileInfo(f).Length));
                    var item = new ListViewItem(fileName , itemIndex);
                    item.SubItems.Add(f);

                    itemIndex++;

                    Invoke((Action)(() => {
                        Text = "集計 (" + itemIndex.ToString() + "件) : " + needle;
                        listView1.Items.Add(item);
                    }));
                }

                Invoke(new Action(() =>
                {
                    Text = "完了 (" + (itemIndex).ToString() + "件) : " + needle;
                }));

            }, token);

            lock (LockObject)
            {
                IsExit = true;
            }
        }

        private string FileSizeUnit(long b)
        {
            float k = b / 1024;
            float m = k / 1024;
            float g = m / 1024;
            float t = g / 1024;

            if (t >= 1) return "(" + t.ToString("0.00") + "TB)";
            if (g >= 1) return "(" + g.ToString("0.00") + "GB)";
            if (m >= 1) return "(" + m.ToString("0.00") + "MB)";
            if (k >= 1) return "(" + k.ToString("0.00") + "KB)";

            return "";
        }

        private string FileNameComp(string rawFileName, string fileSize)
        {
            string fileName = rawFileName;
            while (TextRenderer.MeasureText(fileName + fileSize, new Font("メイリオ", 9)).Width > 200)
            {
                fileName = fileName.Substring(0, fileName.Length - 1);
            }
            return fileName + fileSize;
        }
    }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Drawing;

using System.IO;

using System.Threading;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.Linq;

namespace FileSearch

{

public partial class SubForm : Form

{

public string Id { set; get; }

object LockObject = new object();

bool IsExit = false;

public SubForm(string needle, List<string> filterItems, string startTime)

{

InitializeComponent();

var tokenSource = new CancellationTokenSource();

var token = tokenSource.Token;

listView1.MultiSelect = false;

listView1.MouseDoubleClick += (s, e) =>

{

string itemPath = listView1.SelectedItems[0].SubItems[1].Text;

if (ModifierKeys == Keys.Control)

{

var info = new ProcessStartInfo("explorer.exe");

info.Arguments = $"/select, \"{itemPath}\"";

Process.Start(info);

}

else

{

Process.Start(itemPath);

}

};

this.FormClosing += (s, e) =>

{

lock (LockObject)

{

if (!IsExit)

{

tokenSource.Cancel();

e.Cancel = true;

}

};

CreateThumbnail2(needle, filterItems, startTime, token);

}

private async void CreateThumbnail2(string needle, List<string> filterItems, string startTime, CancellationToken token)

{

ImageList il = new ImageList();

il.ImageSize = new Size(200, 200);

il.ColorDepth = ColorDepth.Depth32Bit;

listView1.LargeImageList = il;

var listItems = new System.Collections.Concurrent.ConcurrentBag<ListViewItem>();

var tasks = new List<Task>();

foreach (string f in filterItems)

{

if (!File.Exists(f)) continue;

if (Path.GetExtension(f) != ".mp4" && Path.GetExtension(f) != ".mkv" && Path.GetExtension(f) != ".flv") continue;

var t = Task.Run(() =>

{

if (token.IsCancellationRequested) return;

while (!IsHandleCreated) { }

int itemCount = 0;

string option = " -ss " + startTime + " -i \"" + f + "\" -vframes 1 -f image2 pipe:1";

ProcessStartInfo ps = new ProcessStartInfo(Application.StartupPath + @"\ffmpeg.exe", option);

ps.RedirectStandardOutput = true;

ps.CreateNoWindow = true;

ps.UseShellExecute = false;

using (Process p = new Process())

{

try

{

p.StartInfo = ps;

if (!p.Start()) throw new Exception();

using (Image img = Image.FromStream(Stream.Synchronized(p.StandardOutput.BaseStream)))

{

Image thumb = img.GetThumbnailImage(200, 200, null, IntPtr.Zero);

Invoke(new Action(() =>

{

il.Images.Add(thumb);

itemCount = il.Images.Count;

}));

}

catch (Exception)

{

Image img = new Bitmap(200, 200);

Invoke(new Action(() =>

{

il.Images.Add(img);

itemCount = il.Images.Count;

}));

}

string fileName = FileNameComp(Path.GetFileName(f), FileSizeUnit(new FileInfo(f).Length));

var item = new ListViewItem(fileName, itemCount-1);

item.SubItems.Add(f);

listItems.Add(item);

Invoke((Action)(() =>

{

Text = "集計 (" + itemCount.ToString() + "件) : " + startTime + "秒 : " + needle;

}));

}, token);

tasks.Add(t);

}

try

{

await Task.WhenAll(tasks.ToArray());

}

catch { }

listView1.Items.AddRange(listItems.ToArray());

Text = "完了 (" + il.Images.Count.ToString() + "件) : " + startTime + "秒 : "+ needle;

lock (LockObject)

{

IsExit = true;

}

private async void CreateThumbnail1(string needle, List<string> filterItems, CancellationToken token)

{

ImageList il = new ImageList();

il.ImageSize = new Size(200, 200);

il.ColorDepth = ColorDepth.Depth32Bit;

listView1.LargeImageList = il;

int itemIndex = 0;

await Task.Run(() => {

while (!IsHandleCreated) { }

foreach (string f in filterItems)

{

if (token.IsCancellationRequested) break;

if (!File.Exists(f)) continue;

if (Path.GetExtension(f) != ".mp4" && Path.GetExtension(f) != ".mkv" && Path.GetExtension(f) != ".flv") continue;

string ss = "60";

string option = " -ss " + ss + " -i \"" + f + "\" -vframes 1 -f image2 pipe:1";

ProcessStartInfo ps = new ProcessStartInfo(Application.StartupPath + @"\ffmpeg.exe", option);

ps.RedirectStandardOutput = true;

ps.CreateNoWindow = true;

ps.UseShellExecute = false;

using (Process p = new Process())

{

try

{

p.StartInfo = ps;

if (!p.Start()) throw new Exception();

using (Image img = Image.FromStream(p.StandardOutput.BaseStream))

{

Image thumb = img.GetThumbnailImage(200, 200, null, IntPtr.Zero);

Invoke(new Action(() => {

il.Images.Add(thumb);

}));

}

catch (Exception)

{

Image img = new Bitmap(200, 200);

Invoke(new Action(() => {

il.Images.Add(img);

}));

}

string fileName = FileNameComp(Path.GetFileName(f), FileSizeUnit(new FileInfo(f).Length));

var item = new ListViewItem(fileName , itemIndex);

item.SubItems.Add(f);

itemIndex++;

Invoke((Action)(() => {

Text = "集計 (" + itemIndex.ToString() + "件) : " + needle;

listView1.Items.Add(item);

}));

}

Invoke(new Action(() =>

{

Text = "完了 (" + (itemIndex).ToString() + "件) : " + needle;

}));

}, token);

lock (LockObject)

{

IsExit = true;

}

private string FileSizeUnit(long b)

{

float k = b / 1024;

float m = k / 1024;

float g = m / 1024;

float t = g / 1024;

if (t >= 1) return "(" + t.ToString("0.00") + "TB)";

if (g >= 1) return "(" + g.ToString("0.00") + "GB)";

if (m >= 1) return "(" + m.ToString("0.00") + "MB)";

if (k >= 1) return "(" + k.ToString("0.00") + "KB)";

return "";

}

private string FileNameComp(string rawFileName, string fileSize)

{

string fileName = rawFileName;

while (TextRenderer.MeasureText(fileName + fileSize, new Font("メイリオ", 9)).Width > 200)

{

fileName = fileName.Substring(0, fileName.Length - 1);

}

return fileName + fileSize;

}