diff --git a/h264_converter.py b/h264_converter.py
index 02ccaa8..48c060d 100644
--- a/h264_converter.py
+++ b/h264_converter.py
@@ -14,6 +14,35 @@ l = c.cdll.LoadLibrary(dll)
 
 print("Readed DLL SDK Version", l.H264_PLAY_GetSdkVersion())
 
+##only use this part in windows
+from subprocess import call as sCall
+from subprocess import DEVNULL
+import os, sys
+
+def check():
+    try:
+        if sCall(f"ffmpeg -version", stdin=DEVNULL, stdout=DEVNULL, stderr=DEVNULL) != 0:
+            print("Cannot find ffmpeg, features must be disabled")
+            return False
+        else:
+            print("Enabled ffmpeg features!")
+            return True
+    except:
+        return False
+
+FFMPEG = check()
+
+def convertAviToAny(source_file, out_format, print_statuses = False):
+    print(f"Start convertion to {out_format}")
+    sCall(f"ffmpeg -y -i \"{source_file}\" \"{source_file}.{out_format}\"", stdin=None if print_statuses else DEVNULL, stdout=None if print_statuses else DEVNULL, stderr=None if print_statuses else DEVNULL)
+    if os.path.exists(f"{source_file}.{out_format}"):
+        print("convert to other format success")
+        os.remove(source_file)
+    else:
+        print("in process convert trubles convert")
+        sys.exit(2)
+##end
+
 @c_callback(None, c_windows.DWORD, c_windows.DWORD, c.c_long)
 def coverPosCallback(CurrentPos, TotoalPos, dwUser):
     pass
@@ -36,8 +65,10 @@ enum ENCODE_TYPE
 	StreamTypeStd = 8
 };
 """)
+parser.add_argument("--out-format", type=str, default="avi", help = "output video file type")
+parser.add_argument("--show-convertion", action="store_true", help = "show ffmpeg cenvertion statuses")
 args = parser.parse_args()
-output = str(args.input + ".avi")
+output = f"{args.input}.avi"
 
 print("Input file path:", args.input)
 print("Output file path", output)
@@ -63,9 +94,19 @@ while True:
     if os.path.exists(output):
         if os.path.getsize(output) == last_size:
             print("completed!", check_exists_fails, check_output_complete)
-            sys.exit(0)
+            if args.out_format.lower() != "avi":
+                if FFMPEG:
+                    convertAviToAny(output, args.out_format, args.show_convertion)
+                    sys.exit(0)
+                else:
+                    print("cannot find ffmpeg, save only original file")
+                    sys.exit(0)
+            else:
+                print("not need convert file")
+                sys.exit(0)
         else:
             last_size = os.path.getsize(output)
             check_output_complete -= 1
     else:
-        check_exists_fails -= 1
\ No newline at end of file
+        check_exists_fails -= 1
+