diff --git a/Sparks_in_Blender_encode.py b/Sparks_in_Blender_encode.py
index c957670..6f3a2e0 100755
--- a/Sparks_in_Blender_encode.py
+++ b/Sparks_in_Blender_encode.py
@@ -14,8 +14,10 @@ from collections import OrderedDict
 
 import json
 
+from typing import Union, Any
+
 # encoding options used
-encoding = {
+encoding: dict[str, Any] = {
     "libx264": {
         "crf": [10, 14, 16, 18, 20, 22, 25],
         "presets": [
@@ -57,8 +59,8 @@ def now():
 
 def write_line(
     codec: str,
-    crf: str,
-    preset: str,
+    crf: int,
+    preset: Union[str, int],
     infile: str,
     outfilesize: float,
     enctime: int,
@@ -70,8 +72,8 @@ def write_line(
 
     Parameters:
         codec (str): Codec used
-        crf (str): CRF used
-        preset (str): Preset used
+        crf (int): CRF used
+        preset (str/int): Preset used
         infile (str): Input file name
         outfilesize (float): Size of output file
         enctime (int): Time to encode
@@ -94,7 +96,9 @@ def write_line(
         )
 
 
-def encode_general(inputfile: str, outputfile: str, codec: str, crf: str, preset: str):
+def encode_general(
+    inputfile: str, outputfile: str, codec: str, crf: int, preset: Union[str, int]
+):
     """
     General encoding function
 
@@ -102,8 +106,8 @@ def encode_general(inputfile: str, outputfile: str, codec: str, crf: str, preset
     inputfile (str): Path to input file
     outputfile (str): Path to output file
     codec (str): Codec used
-    crf (str): CRF value
-    preset (str): Choosen preset
+    crf (int): CRF value
+    preset (str/int): Choosen preset
     """
     ff = ffmpy.FFmpeg(
         inputs={inputfile: None},
@@ -119,15 +123,15 @@ def encode_general(inputfile: str, outputfile: str, codec: str, crf: str, preset
     return ff
 
 
-def encode_libaom(inputfile: str, outputfile: str, crf: str, preset: str):
+def encode_libaom(inputfile: str, outputfile: str, crf: int, preset: Union[str, int]):
     """
     Encoding with libaom
 
     Parameters:
     inputfile (str): Path to input file
     outputfile (str): Path to output file
-    crf (str): CRF value
-    preset (str): Choosen preset
+    crf (int): CRF value
+    preset (str/int): Choosen preset
     """
     ff = ffmpy.FFmpeg(
         inputs={inputfile: None},