--- a/generateHourlys.php
+++ b/generateHourlys.php
@@ -6,22 +6,30 @@
     if(!file_exists("hourly/".$filename)) {
 
         $filenames = explode(",",$hourly['filenames']);
-        $cmd = "/usr/local/bin/ffmpeg -i data/".implode(" -i data/",$filenames)." -ar 8000 -ab 4.75k -ac 1 hourly/".$filename . ' 2>&1';
+        $cmd = "/usr/local/bin/ffmpeg -filter_complex concat=n=".count($filenames).":v=0:a=1 -i data/".implode(" -i data/",$filenames)." -ar 8000 -ab 4.75k -ac 1 hourly/".$filename . ' 2>&1';
         //print_r($hourly);
         exec ( $cmd,$output,$returncode );
         echo $cmd."<br>\n";
         if ($returncode != 10) {
             //print_r($output);
             //die();
+        } else {
+        /*  insert
+          "filename" text NOT NULL,
+          "files" text ARRAY NOT NULL,
+          "datetime" timestamp NOT NULL
+          */
+          // delete wav files? can we link to times in a compilation?
         }
+
     }
 }
 $sth = $conn->prepare("select tgid, extract(hour from call_timestamp) ahour, date_trunc('day', call_timestamp) aday, count(filename), array_to_string(array_agg(filename order by call_timestamp), ',') filenames from recordings group by tgid, ahour, aday order by  aday DESC, ahour, tgid;");
-
+// TODO use tgid categories instead, tgid too specific
 $sth->execute();
 $hourlies = $sth->fetchAll(PDO::FETCH_ASSOC);
 foreach($hourlies as $hourly) {
-    //processHourly($hourly);
+    processHourly($hourly);
 }
 $sth = $conn->prepare("select 'hour' as tgid, extract(hour from call_timestamp) ahour, date_trunc('day', call_timestamp) aday, count(filename), array_to_string(array_agg(filename order by call_timestamp), ',') filenames from recordings group by ahour, aday order by  aday DESC, ahour;");
 
@@ -31,3 +39,6 @@
     processHourly($hourly);
 }
 
+
+// delete uninteresting compilations
+