diff --git a/s/index.tpl.html b/s/index.tpl.html
index a6db6a5..83a6f45 100644
--- a/s/index.tpl.html
+++ b/s/index.tpl.html
@@ -8,7 +8,7 @@
 <body>
   <div class="navbar"><a href="/">f0ck.me</a> | <a href="/how">how to</a> | <a href="/contact">Contact</a></div>
   <ul id="posts" data-last="{{ last }}">
-    {% for item in items %}<li class="post"><a href="//f0ck.me/{{ item.id }}" title="{{ item.mime }}"><img class="thumb" src="//f0ck.me/t/{{ item.id }}.png" /></a></li>
+    {% for item in items %}<li class="post"><a href="./{{ item.id }}" title="{{ item.mime }}"><img class="thumb" src="./t/{{ item.id }}.png" /></a></li>
     {% endfor %}
   </ul>
   <script src="./s/jquery-3.1.0.min.js"></script>
@@ -22,7 +22,7 @@
           var html = "";
           for(var i = 0; i < msg.items.length; i++)
             if(msg.items[i].id)
-              html += "<li class=\"post\"><a href=\"//f0ck.me/"+msg.items[i].id+"\" title=\""+msg.items[i].mime+"\"><img class=\"thumb\" src=\"//f0ck.me/t/"+msg.items[i].id+".png\" /></a></li>\n";
+              html += "<li class=\"post\"><a href=\"./"+msg.items[i].id+"\" title=\""+msg.items[i].mime+"\"><img class=\"thumb\" src=\"./t/"+msg.items[i].id+".png\" /></a></li>\n";
           $('#posts').append(html);
           $('#posts').data('last', msg.last);
           load = false;
diff --git a/src/lib.js b/src/lib.js
index 215e712..dbcd9dd 100644
--- a/src/lib.js
+++ b/src/lib.js
@@ -98,6 +98,38 @@ Lib.prototype.getCheckSum = (file, cbcs) => {
   });
 };
 Lib.prototype.generateThumbs = () => {
+  var outdir = './t';
+  Lib.prototype.sql.query("select * from `f0ck`.`items`", (err, rows, fields) => {
+    rows.forEach((e,i,a) => {
+      var thumbnail = outdir+'/'+e.id+'.png';
+      if(!fs.existsSync(thumbnail)) {
+        var cmd;
+        switch(e.mime) {
+          case "video/mp4":
+          case "video/webm":
+          case "audio/mpeg":
+          case "audio/ogg":
+          case "image/gif":
+            cmd = 'ffmpeg -i '+e.dest+' -vframes 1 -filter "scale=-1:256,crop=128:128" '+thumbnail;
+            break;
+          case "image/png":
+          case "image/jpeg":
+            cmd = 'convert -thumbnail 256x256 '+e.dest+' -gravity center -crop 128x128+0+0 +repage '+thumbnail;
+            break;
+        }
+        exec(cmd, (error) => {
+          if(error) {
+            Lib.prototype.log('failed thumbnail for '+e.id+' ('+e.mime+') '+JSON.stringify(error));
+            fs.copySync('./s/mp3.png', thumbnail); // copy standardthumbnail
+          }
+          else
+            Lib.prototype.log("generated thumbnail for "+e.id+" ("+e.mime+")");
+        });
+      }
+    });
+  });
+};
+/*Lib.prototype.generateThumbs = () => {
   var outdir = './t/';
   Lib.prototype.sql.query("select * from `f0ck`.`items`", (err, rows, fields) => {
     rows.forEach((e,i,a) => {
@@ -120,7 +152,7 @@ Lib.prototype.generateThumbs = () => {
       }
     });
   });
-};
+};*/
 Lib.prototype.log = (msg) => {
   if(Lib.prototype.debug)
     bot.send(Lib.prototype.cfg.debugchannel, msg, 'n0xy');
diff --git a/src/trigger/thumb.js b/src/trigger/thumb.js
index 5724483..c347459 100644
--- a/src/trigger/thumb.js
+++ b/src/trigger/thumb.js
@@ -3,19 +3,25 @@
 module.exports = (bot, lib) => {
   lib.trigger.add({
     name: 'thumbnailer',
-    call: /^\!thumb (\d+)$/i,
+    call: /^\!thumb(.*\d+)?$/i,
     level: 100,
     active: 1,
     func: (e) => {
-      var id = e.message.split(' ')[1];
-      if(Number.isInteger(parseInt(id))) {
-        fs.unlink('./t/'+id+'.png', () => {
-          //e.reply('debug: Thumbnail gelöscht');
-          lib.generateThumbs();
-          //e.reply('debug: sollte Thumbnail generiert haben');
-        });
+      var id;
+      if(id = e.message.split(' ')[1]) {
+        if(Number.isInteger(parseInt(id)))
+          fs.unlink('./t/'+id+'.png', () => lib.generateThumbs() );
+      }
+      else {
+        deleteFolderRecursive('./t');
+        lib.generateThumbs();
       }
     },
-    desc: 'regenerate thumbnail'
+    desc: 'generate thumbnail'
   });
+};
+
+var deleteFolderRecursive = (path) => {
+  if(fs.existsSync(path))
+    fs.readdirSync(path).forEach((file,index) => (fs.lstatSync(path+"/"+file).isDirectory())?deleteFolderRecursive(path+"/"+file):fs.unlinkSync(path+"/"+file) );
 };
\ No newline at end of file
