diff --git a/scripts/txt2txt.py b/scripts/txt2txt.py
index 42b248533406192ba2b72242fd2edd6ae9b3f349..0ea7c0e56740320c95406cd929522b47b7c467de 100644
--- a/scripts/txt2txt.py
+++ b/scripts/txt2txt.py
@@ -7,40 +7,43 @@ import argparse
 
 def getParserArgs():
     parser = argparse.ArgumentParser(description='Tranfer the unit from cm to m and add header for .txt file')
+
+    parser.add_argument("--filename", help='give the name of the source file')
     parser.add_argument("-m", "--metric", action='store', choices=['m','cm'], default='m', help='give the original metric of trajectories (default m)')
     parser.add_argument("-f", "--fps", default="16", type=float, help='give the frame rate of data')
     parser.add_argument("-p", "--path", default="./", help='give the path of source file')
+    parser.add_argument("-d", "--description", help='give some description', default='Transfer with JPSreport')
+    parser.add_argument("-g", "--geometry", help="give the name of the geometry file", default='geometry.xml')
+
     args = parser.parse_args()
+
     return args
 
 if __name__ == '__main__':
     args = getParserArgs()
-    path = args.path
-    isTrajCm = args.metric # 1 means trajectories are in cm. Otherwise they are in m
-    print(path)
+
+    filename    = args.filename
+    isTrajCm    = args.metric # 1 means trajectories are in cm. Otherwise they are in m
+    fps         = args.fps
+    path        = args.path
+    description = args.description
+    geometry    = args.geometry
+
     sys.path.append(path)
-    fps = args.fps
-    files = glob.glob("%s/*.txt"%(path))
-    print(files)
-    for file in files:
-        description="experiment"
-        geometry="geometry.xml"
-        print(os.path.splitext(file)[0])
-        fname = (os.path.splitext(file)[0])+"_traj.txt"
-        print(file)
-        print(fname)
-        header="#description: %s\n#framerate: %d\n#geometry: %s\n#ID: the agent ID\n#FR: the current frame\n#X,Y,Z: the agents coordinates (in metres)\n\n#ID\tFR\tX\tY\tZ"%(description,fps,geometry)
-        data=loadtxt(file,usecols = (0,1,2,3,4))
-
-        if isTrajCm == "m": # data are in meter
-            mTocm = 1
-        elif isTrajCm == "cm":
-            mTocm = 100
-        else:
-            pass
-
-        data[:,2]/=mTocm
-        data[:,3]/=mTocm
-        data[:,4]/=mTocm
-
-        savetxt(fname,data, fmt= "%d\t%d\t%.4f\t%.4f\t%.4f", delimiter ='\t', header=header, comments='', newline='\r\n')
+
+    header="# description: %s\n# framerate: %d\n# geometry: %s\n# ID: the agent ID\n# FR: the current frame\n# X,Y,Z: the agents coordinates (in metres)\n\n# ID\tFR\tX\tY\tZ"%(description,fps,geometry)
+
+    data=loadtxt("%s/%s.txt"%(path,filename),usecols = (0,1,2,3,4))
+
+    if isTrajCm == "m": # data are in meter
+        mTocm = 1
+    elif isTrajCm == "cm":
+        mTocm = 100
+    else:
+        pass
+
+    data[:,2]/=mTocm
+    data[:,3]/=mTocm
+    data[:,4]/=mTocm
+
+    savetxt("%straj_%s.txt"%(path,filename),data, fmt= "%d\t%d\t%.4f\t%.4f\t%.4f", delimiter ='\t', header=header, comments='', newline='\r\n')