diff --git a/helper.php b/helper.php
index e50a421..7970423 100755
--- a/helper.php
+++ b/helper.php
@@ -16,6 +16,9 @@ $pathname = $argv[3];
 $bpath = $argv[4];
 $mytime = $argv[5];
 
+$tmpdir = "/tmp/yuba/".$mytime;
+if (!is_dir($tmpdir)) { mkdir($tmpdir,0777,true); }
+
 $file = pathinfo($pathname, PATHINFO_BASENAME);
 $ext = pathinfo($pathname, PATHINFO_EXTENSION);
 
@@ -45,7 +48,7 @@ switch ($mode) {
 		break;
 		}
 	
-	$tfile = "/tmp/Yuba/".$mytime."/".substr($fid,0,3)."/".$file.".png";
+	$tfile = $tmpdir."/".substr($fid,0,2)."/".$file.".png";
 	if (!is_dir(dirname($tfile))) { @mkdir(dirname($tfile)); }
 	// workaround for qlmanage naming convention
 
@@ -82,10 +85,11 @@ switch ($mode) {
 		
 		// > code for custom qlgenerator bindings goes here <
 		
-		$cmd = "qlmanage -ti -f ".floor($p['icon_size']/128)." -o ".basename($tfile)." ".$shellpath;
+		//$cmd = "qlmanage -ti -s ".$p['icon_size']." -o ".dirname($tfile)." ".$shellpath;
+		$cmd = "qlmanage -ti -f ".floor($p['icon_size']/128)." -o ".dirname($tfile)." ".$shellpath;	
 			
 		}
-			
+
 	shell_exec($cmd);
 	
 	if (@filesize($tfile)) {
@@ -106,17 +110,18 @@ switch ($mode) {
 				
 			$dfile = $bpath."/icons/".substr($hash, 0, 2)."/".$hash.".png";
 			if (!is_dir(dirname($dfile))) { @mkdir(dirname($dfile)); }
-				
+			
+			echo " ->use";
+			
 			if ($tool == "qltool") {
 			// qltool makes 2x icons for some reason
 				
-				echo " ->use";
-				
 				//shell_exec("sips -z ".$p['icon_size']." ".$p['icon_size']." ".$tfile." --out ".$dfile);
 				shell_exec($bin_convert." ".escapeshellarg($tfile)." -scale 50% -strip -define png:compression-level=9 ".$dfile);
 				
 				} else {
-					
+				
+				//rename($tfile,$dfile);
 				shell_exec($bin_convert." ".escapeshellarg($tfile)." -strip -define png:compression-level=9 ".$dfile);
 					
 				}
@@ -135,6 +140,8 @@ switch ($mode) {
 			
 	$stmt->execute();
 	
+	echo " ->db";
+	
 	break;
 	
 	case "thumbs":
@@ -149,6 +156,105 @@ switch ($mode) {
 						6616,
 						17393	);
 	
+	$tfile = $tmpdir."/".substr($fid,0,2)."/".$fid.".jpg";
+	$tpfile = $tmpdir."/".substr($fid,0,2)."/".$file.".png"; // workaround for qlmanage naming convention
+	if (!is_dir(dirname($tfile))) { @mkdir(dirname($tfile)); }
+	
+	if (in_array($ext, $p['t_skip'])) {
+	// file extension is in the skip list
+		echo " ->t_skip";
+		break;
+		}
+		
+	if ($p['thumbs'] == 1 && file_exists($tfile)) {
+	// if this is not a rebuild, first check for an existing thumb file (faster)
+		echo " ->skip_fast";
+		break;
+		}
+		
+	$rowid = @$dbp->query("SELECT rowid FROM thumbs WHERE fid='".$fid."'")->fetch()['rowid'];
+	// check for existing thumb generation attempt
+	
+	if (!$rowid) {
+	// no prior attempt
+	
+		$stmt = $dbp->prepare("INSERT INTO thumbs VALUES (:fid, :created, :relative_path, :width, :height, :tool)");
+		echo " ->generate";
+		
+		} elseif ($rowid && $p['thumbs'] == 2) {
+		// prior attempt but rebuild mode
+		
+		$stmt = $dbp->prepare("UPDATE thumbs SET fid = :fid, created = :created, relative_path = :relative_path, width = :width, height = :height, tool = :tool WHERE rowid = ".$rowid);
+		echo " ->rebuild";
+		
+		} else {
+		// prior attempt
+		
+		echo " ->skip";
+		break;
+		
+		}
+	
+	$cmd['sips'] = "sips -s format jpeg -s formatOptions 80 --resampleHeightWidthMax ".$p['thumb_size']." ".$shellpath." --out ".$tfile; // add ?? "-d profile --deleteColorManagementProperties"
+	$cmd['vips'] = $bin_vips." ".$shellpath." -o ".$tfile."[Q=90,optimize_coding] --size=".$p['thumb_size'];
+	
+	$cmd['sox'] = $bin_sox." ".$shellpath." -n trim 0 $(".$bin_exiftool." -s -s -s -duration# ".$shellpath." | awk '{print $1/10}') spectrogram -o - | ".$bin_convert." - -crop 800x515+58+30 -scale 515x515! +dither -colors 16 ".$tfile;
+	$cmd['ffmpeg'] = $bin_ffmpeg." -ss $(( $(".$bin_mediainfo." --Inform='Video;%Duration%' ".$shellpath." | cut -d'.' -f1) / 10000 )) -i ".$shellpath." -vframes 1 -filter:v scale='400:-1' -q:v 3 ".$tfile;
+	
+	$cmd['ql-thumbnail'] = $bin_qlthumb." ".$shellpath." ".$tfile." public.jpeg ".$p['thumb_size']." ".$p['thumb_size']." .8";
+	$cmd['qlmanage'] = "qlmanage -t -s ".$p['thumb_size']." -o ".dirname($tpfile)." ".$shellpath."; sips -s format jpeg -s formatOptions 80 ".escapeshellarg($tpfile)." --out ".$tfile;
+	
+	if (in_array($ext, $p['t_files']['sips'])) {
+		$external_tool = "sips";
+		} elseif (in_array($ext, $p['t_files']['ffmpeg'])) {
+		$external_tool = "ffmpeg";
+		} elseif (in_array($ext, $p['t_files']['sox'])) {
+		$external_tool = "sox";
+		} else {
+		$external_tool = null;
+		}
+	switch ($p['thumb_priority']) {
+		// external tool priority
+		case 0: $priority = array($external_tool,"ql-thumbnail","qlmanage"); break;
+		// ql-thumbnail priority
+		case 1: $priority = array("ql-thumbnail","qlmanage",$external_tool); break;
+		// qlmanage priority
+		case 2: $priority = array("qlmanage","ql-thumbnail",$external_tool); break;
+		}
+	
+	$stmt->BindValue(":fid",$fid);
+	$stmt->BindValue(":created",time());
+	
+	$dfile = $bpath."/thumbs/".substr($fid, 0, 2)."/".$fid.".jpg";;
+	if (!is_dir(dirname($dfile))) { @mkdir(dirname($dfile)); }
+	
+	foreach ($priority as $tool) {
+
+		if (empty($cmd[$tool])) { continue; }
+		
+		shell_exec($cmd[$tool]." 2>&1");
+		echo " ->".$tool;
+				
+		$checksize = @filesize($tfile);
+		if ($checksize && !in_array($checksize,$discard)) {
+			echo " ->use";
+			$stmt->BindValue(":tool",$tool);
+			$stmt->BindValue(":relative_path",substr($dfile, strlen($bpath)));
+			list($width, $height) = getimagesize($tfile);
+			$stmt->BindValue(":width",$width);
+			$stmt->BindValue(":height",$height);
+			rename($tfile,$dfile);
+			break;
+			} else {
+			echo " ->discard";
+			}
+
+		}
+
+	$stmt->execute();
+	
+	echo " ->db";
+	
 	break;
 	
 	}