diff --git a/export-video.py b/export-video.py
index ef97be9..f787aa3 100755
--- a/export-video.py
+++ b/export-video.py
@@ -10,6 +10,9 @@ import getopt
 import re
 import os
 import subprocess
+import logging
+
+logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.DEBUG)
 
 
 def usage():
@@ -43,10 +46,6 @@ params = {
 VERSION = "0.1dev"
 
 
-def log(msg):
-    sys.stdout.write(msg + "\n")
-
-
 def execute(command, shell=False):
     """
     Execute a system command and return its results.
@@ -58,7 +57,7 @@ def execute(command, shell=False):
                                           stdout=subprocess.PIPE,
                                           stderr=subprocess.PIPE).communicate()
     except OSError as ex:
-        print('Could not run command %s: %s', command, ex)
+        logging.error('Could not run command %s: %s', command, ex)
         return
     return stdout.strip()
 
@@ -70,20 +69,21 @@ def find_executable(exec_name):
 
 
 def listFile(directory, pattern, recursive):
-    log("searching in directory" + directory)
+    logging.info('searching in directory %s', directory)
     files_list = []
     try:
         dirs = os.listdir(directory)
     except:
-        print("error : not a directory?")
+        logging.error('error : %s not a directory?', directory)
         return
 
     for i in dirs:
         if os.path.isdir(directory + "/" + i) and recursive:
+            logging.info('directory found : %s', i)
             files_list.extend(listFile(directory + "/" + i, pattern))
         else:
             if re.search(pattern, i) is not None:
-                log("file found : " + i)
+                logging.info('file found : %s', i)
                 files_list.append(directory + "/" + i)
     return files_list
 
@@ -115,10 +115,8 @@ def processArg(sysarg):
             usage()
             sys.exit()
         if opt in ("-o", "--output"):
-            log("output spécifié " + arg)
             params["file_output"] = arg
         if opt in ("-d", "--desinterlace"):
-            log("desinterlace on")
             params["desinterlace"] = True
         if opt in ("-i", "--input"):
             params["file_input"] = arg
@@ -129,16 +127,14 @@ def processArg(sysarg):
         if opt in ("-v", "--vbitrate"):
             params["vbitrate"] = arg
         if opt in ("-2", "--twopass"):
-            log("TwoPass encoding on")
             params["twopass"] = True
         if opt in ("-r", "--recursive"):
-            log("Recursive search of video files")
             params["recursive"] = True
 
 
 def encode_h264(src, dest):
     if (params["twopass"]):
-        log("two pass encoding started ...")
+        logging.debug("two pass encoding started ...")
         firstpass = [
             exec_ffmpeg,
             "-y",
@@ -164,7 +160,7 @@ def encode_h264(src, dest):
         subprocess.run(firstpass)
         subprocess.run(secondpass)
     else:
-        log("one pass encoding started ...")
+        logging.debug("one pass encoding started ...")
         encode = [
             exec_ffmpeg,
             "-i", src,
@@ -182,25 +178,25 @@ def encode_h264(src, dest):
 if __name__ == "__main__":
     exec_ffmpeg = find_executable("ffmpeg")
     if not exec_ffmpeg:
-        log("ffmpeg not found, exiting")
+        print('ffmpeg not found, exiting')
         sys.exit(2)
-    # log("export_video v" + VERSION + "FFMPEG exec " + exec_ffmpeg)
+    print('export_video v%s with FFMPEG  %s', VERSION, exec_ffmpeg)
     processArg(sys.argv[1:])
     if not params["file_input"]:
-        log("you must specify a file / directory" + params["file_input"])
+        print("you must specify a file / directory input")
         sys.exit(2)
     if os.path.isdir(params["file_input"]):
         if os.path.isfile(params["file_output"]):
-            log("Can't batch export to a file! Bye Bye")
+            print("Can't batch export to a single file! Bye Bye")
             sys.exit(2)
-        log(params["file_input"] + " is a directory")
+        logging.info('%s is a directory', params["file_input"])
         video_files = listFile(
                 params["file_input"],
                 params["pattern"],
                 params["recursive"]
             )
         for f in video_files:
-            log("batch encode | file : " + f)
+            logging.info('batch encode | file %s to %s', f)
             encode_h264(f, params["file_output"] + getFileName(f))
     else:
         if os.path.isfile(params["file_input"]):
@@ -209,9 +205,9 @@ if __name__ == "__main__":
             else:
                 if(os.path.isdir(params["file_output"])):
                     params["file_input"] += getFileName(params["file_input"])
-            log(params["file_input"] + " is a file")
+            logging.info('%s is a file', params["file_input"])
             encode_h264(params["file_input"], params["file_output"])
         else:
-            print("input file desn't exist, bye bye")
+            logging.info("input file desn't exist, bye bye")
             sys.exit(2)
     sys.exit(0)