diff --git a/.gitignore b/.gitignore
index e6aa831..e3947bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 /output/
 /tests/
+/tests_compressed/
 /build/
 /dist/
 /vntools.egg-info/
diff --git a/vnrecode/__main__.py b/vnrecode/__main__.py
index faf1839..fe45306 100644
--- a/vnrecode/__main__.py
+++ b/vnrecode/__main__.py
@@ -7,6 +7,10 @@ from .utils import Utils
 
 
 def init():
+    """
+    This function creates all needed class instances and run utility
+    :return: None
+    """
     params = Params.setup()
     printer = Printer(params.source)
     utils = Utils(params, printer)
diff --git a/vnrecode/application.py b/vnrecode/application.py
index 912c526..2b19681 100755
--- a/vnrecode/application.py
+++ b/vnrecode/application.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from datetime import datetime
+from pathlib import Path
 import shutil
 import os
 
@@ -11,43 +12,48 @@ from .utils import Utils
 
 
 class Application:
+    """
+    Main class for utility
+    """
 
-    def __init__(self, params: Params, compress: Compress, printer: Printer, utils: Utils):
-        self.params = params
-        self.compress = compress.compress
-        self.printer = printer
-        self.utils = utils
-
-    def compress_worker(self, folder: str, file: str, source: str, output: str):
-        if os.path.isfile(os.path.join(folder, file)):
-            self.compress(folder, file, source, output)
+    def __init__(self, params_inst: Params, compress_inst: Compress, printer_inst: Printer, utils_inst: Utils):
+        self.__params = params_inst
+        self.__compress = compress_inst.compress
+        self.__printer = printer_inst
+        self.__utils = utils_inst
 
     def run(self):
+        """
+        Method creates a folder in which all the recoded files will be placed,
+        creates a queue of recoding processes for each file and, when the files are run out in the original folder,
+        calls functions to display the result
+        :return: None
+        """
         start_time = datetime.now()
-        self.printer.win_ascii_esc()
+        self.__printer.win_ascii_esc()
 
-        source = os.path.abspath(self.params.source)
+        source = self.__params.source
 
-        if os.path.exists(f"{source}_compressed"):
-            shutil.rmtree(f"{source}_compressed")
+        if self.__params.dest.exists():
+            shutil.rmtree(self.__params.dest)
 
-        self.printer.info("Creating folders...")
+        self.__printer.info("Creating folders...")
         for folder, folders, files in os.walk(source):
-            if not os.path.exists(folder.replace(source, f"{source}_compressed")):
-                os.mkdir(folder.replace(source, f"{source}_compressed"))
+            output = Path(folder.replace(str(source), str(self.__params.dest)))
+            if not output.exists():
+                os.mkdir(output)
 
-            self.printer.info(f'Compressing "{folder.replace(source, os.path.split(source)[-1])}" folder...')
-            output = folder.replace(source, f"{source}_compressed")
+            self.__printer.info(f'Compressing "{folder}" folder...')
 
-            with ThreadPoolExecutor(max_workers=self.params.workers) as executor:
+            with ThreadPoolExecutor(max_workers=self.__params.workers) as executor:
                 futures = [
-                    executor.submit(self.compress, folder, file, source, output)
-                    for file in files if os.path.isfile(os.path.join(folder, file))
+                    executor.submit(self.__compress, Path(folder, file), Path(output))
+                    for file in files if Path(folder, file).is_file()
                 ]
                 for future in as_completed(futures):
                     future.result()
 
-        self.utils.print_duplicates()
-        self.utils.get_compression_status(source)
-        self.utils.sys_pause()
+        self.__utils.print_duplicates()
+        self.__utils.get_recode_status()
+        self.__utils.sys_pause()
         print(f"Time taken: {datetime.now() - start_time}")
\ No newline at end of file
diff --git a/vnrecode/compress.py b/vnrecode/compress.py
index 18fb20e..b1c2567 100644
--- a/vnrecode/compress.py
+++ b/vnrecode/compress.py
@@ -1,6 +1,6 @@
 from ffmpeg import FFmpeg, FFmpegError
+from pathlib import Path
 from PIL import Image
-from os import path
 import pillow_avif
 
 from .printer import Printer
@@ -9,10 +9,17 @@ from .utils import Utils
 
 
 class File:
+    """
+    Class contains some methods to work with files
+    """
 
     @staticmethod
-    def get_type(filename: str) -> str:
-
+    def get_type(path: Path) -> str:
+        """
+        Method returns filetype string for file
+        :param path: Path of file to determine type
+        :return: filetype string: audio, image, video, unknown
+        """
         extensions = {
             "audio": ['.aac', '.flac', '.m4a', '.mp3', '.ogg', '.opus', '.raw', '.wav', '.wma'],
             "image": ['.apng', '.avif', '.bmp', '.tga', '.tiff', '.dds', '.svg', '.webp', '.jpg', '.jpeg', '.png'],
@@ -21,12 +28,17 @@ class File:
         }
 
         for file_type in extensions:
-            if path.splitext(filename)[1] in extensions[file_type]:
+            if path.suffix in extensions[file_type]:
                 return file_type
         return "unknown"
 
     @staticmethod
     def has_transparency(img: Image) -> bool:
+        """
+        Method checks if image has transparency
+        :param img: Pillow Image
+        :return: bool
+        """
         if img.info.get("transparency", None) is not None:
             return True
         if img.mode == "P":
@@ -43,70 +55,58 @@ class File:
 
 class Compress:
 
-    def __init__(self, params: Params, printer: Printer, utils: Utils):
-        self.params = params
-        self.printer = printer
-        self.utils = utils
+    def __init__(self, params_inst: Params, printer_inst: Printer, utils_inst: Utils):
+        self.__params = params_inst
+        self.__printer = printer_inst
+        self.__utils = utils_inst
 
-    def audio(self, in_dir: str, file: str, out_dir: str, extension: str) -> str:
-        bit_rate = self.params.audio_bitrate
-        out_file = self.utils.check_duplicates(in_dir, out_dir, f'{path.splitext(file)[0]}.{extension}')
+    def audio(self, input_path: Path, output_dir: Path, extension: str) -> Path:
+        """
+        Method recodes audio files to another format using ffmpeg utility
+        :param input_path: Path of the original audio file
+        :param output_dir: Path of the output (compression) folder
+        :param extension: Extension of the new audio file
+        :return: Path of compressed audio file with md5 hash as prefix
+        """
+        bit_rate = self.__params.audio_bitrate
+        prefix = self.__utils.get_hash(input_path.name)
+        out_file = Path(output_dir, f'{prefix}_{input_path.stem}.{extension}')
         try:
             (FFmpeg()
-             .input(path.join(in_dir, file))
+             .input(input_path)
              .option("hide_banner")
              .output(out_file,{"b:a": bit_rate, "loglevel": "error"})
              .execute()
              )
         except FFmpegError as e:
-            self.utils.add_unprocessed_file(path.join(in_dir, file), path.join(out_dir, file))
-            self.utils.errors += 1
-            if not self.params.hide_errors:
-                self.printer.error(f"File {file} can't be processed! Error: {e}")
-        self.printer.files(file, path.splitext(file)[0], extension, f"{bit_rate}")
+            self.__utils.catch_unprocessed(input_path, out_file, e)
+        self.__printer.files(input_path, out_file, f"{bit_rate}")
         return out_file
 
-    def video(self, in_dir: str, file: str, out_dir: str, extension: str) -> str:
-        if not self.params.video_skip:
-            out_file = self.utils.check_duplicates(in_dir, out_dir, f'{path.splitext(file)[0]}.{extension}')
-            codec = self.params.video_codec
-            crf = self.params.video_crf
-
-            try:
-                (FFmpeg()
-                 .input(path.join(in_dir, file))
-                 .option("hide_banner")
-                 .option("hwaccel", "auto")
-                 .output(out_file,{"codec:v": codec, "v:b": 0, "loglevel": "error"}, crf=crf)
-                 .execute()
-                 )
-                self.printer.files(file, path.splitext(file)[0], extension, codec)
-            except FFmpegError as e:
-                self.utils.add_unprocessed_file(f'{in_dir}/{file}', f'{out_dir}/{file}')
-                self.utils.errors += 1
-                if not self.params.hide_errors:
-                    self.printer.error(f"File {file} can't be processed! Error: {e}")
-            return out_file
-        else:
-            self.utils.add_unprocessed_file(f'{in_dir}/{file}', f'{out_dir}/{file}')
-            return f'{out_dir}/{path.splitext(file)[0]}.{extension}'
-
-    def image(self, in_dir: str, file: str, out_dir: str, extension: str) -> str:
-        quality = self.params.image_quality
-        out_file = self.utils.check_duplicates(in_dir, out_dir, f"{path.splitext(file)[0]}.{extension}")
+    def image(self, input_path: Path, output_dir: Path, extension: str) -> Path:
+        """
+        Method recodes image files to another format using Pillow
+        :param input_path: Path of the original image file
+        :param output_dir: Path of the output (compression) folder
+        :param extension: Extension of the new image file
+        :return: Path of compressed image file with md5 hash as prefix
+        """
+        quality = self.__params.image_quality
+        prefix = self.__utils.get_hash(input_path.name)
+        out_file = Path(output_dir, f"{prefix}_{input_path.stem}.{extension}")
         try:
-            image = Image.open(path.join(in_dir, file))
+            image = Image.open(input_path)
 
             if (extension == "jpg" or extension == "jpeg" or
-                    (extension == "webp" and not self.params.webp_rgba)):
+                    (extension == "webp" and not self.__params.webp_rgba)):
                 if File.has_transparency(image):
-                    self.printer.warning(f"{file} has transparency. Changing to fallback...")
-                    extension = self.params.image_fall_ext
+                    self.__printer.warning(f"{input_path.name} has transparency. Changing to fallback...")
+                    out_file = Path(output_dir, f"{prefix}_{input_path.stem}.{self.__params.image_fall_ext}")
 
             if File.has_transparency(image):
                 image.convert('RGBA')
 
-            res_downscale = self.params.image_downscale
+            res_downscale = self.__params.image_downscale
             if res_downscale != 1:
                 width, height = image.size
                 new_size = (int(width / res_downscale), int(height / res_downscale))
@@ -114,50 +114,84 @@ class Compress:
 
             image.save(out_file,
                        optimize=True,
-                       lossless=self.params.image_lossless,
+                       lossless=self.__params.image_lossless,
                        quality=quality,
                        minimize_size=True)
-            self.printer.files(file, path.splitext(file)[0], extension, f"{quality}%")
+            self.__printer.files(input_path, out_file, f"{quality}%")
         except Exception as e:
-            self.utils.add_unprocessed_file(path.join(in_dir, file), path.join(out_dir, file))
-            self.utils.errors += 1
-            if not self.params.hide_errors:
-                self.printer.error(f"File {file} can't be processed! Error: {e}")
+            self.__utils.catch_unprocessed(input_path, out_file, e)
         return out_file
 
-    def unknown(self, in_dir: str, filename: str, out_dir: str) -> str:
-        if self.params.force_compress:
-            self.printer.unknown_file(filename)
-            out_file = self.utils.check_duplicates(in_dir, out_dir, filename)
+    def video(self, input_path: Path, output_dir: Path, extension: str) -> Path:
+        """
+        Method recodes video files to another format using ffmpeg utility
+        :param input_path: Path of the original video file
+        :param output_dir: Path of the output (compression) folder
+        :param extension: Extension of the new video file
+        :return: Path of compressed video file with md5 hash as prefix
+        """
+        prefix = self.__utils.get_hash(input_path.name)
+        out_file = Path(output_dir, f'{prefix}_{input_path.stem}.{extension}')
+        if not self.__params.video_skip:
+            codec = self.__params.video_codec
+            crf = self.__params.video_crf
+
             try:
                 (FFmpeg()
-                 .input(path.join(in_dir, filename))
+                 .input(input_path)
+                 .option("hide_banner")
+                 .option("hwaccel", "auto")
+                 .output(out_file,{"codec:v": codec, "v:b": 0, "loglevel": "error"}, crf=crf)
+                 .execute()
+                 )
+                self.__printer.files(input_path, out_file, codec)
+            except FFmpegError as e:
+                self.__utils.catch_unprocessed(input_path, out_file, e)
+        else:
+            self.__utils.copy_unprocessed(input_path, out_file)
+        return out_file
+
+    def unknown(self, input_path: Path, output_dir: Path) -> Path:
+        """
+        Method recodes files with "unknown" file format using ffmpeg,
+        in the hope that ffmpeg supports this file type and the default settings for it will reduce its size
+        :param input_path: Path of the original file
+        :param output_dir: Path of the output (compression) folder
+        :return: Path of compressed file with md5 hash as prefix
+        """
+        prefix = self.__utils.get_hash(input_path.name)
+        out_file = Path(output_dir, f"{prefix}_{input_path.name}")
+        if self.__params.force_compress:
+            self.__printer.unknown_file(input_path.name)
+            try:
+                (FFmpeg()
+                 .input(input_path)
                  .output(out_file)
                  .execute()
                  )
             except FFmpegError as e:
-                self.utils.add_unprocessed_file(path.join(in_dir, filename), path.join(out_dir, filename))
-                self.utils.errors += 1
-                if not self.params.hide_errors:
-                    self.printer.error(f"File {filename} can't be processed! Error: {e}")
-            return out_file
+                self.__utils.catch_unprocessed(input_path, out_file, e)
         else:
-            self.utils.add_unprocessed_file(path.join(in_dir, filename), path.join(out_dir, filename))
-            return path.join(out_dir, filename)
+            self.__utils.copy_unprocessed(input_path, out_file)
+        return out_file
 
-    def compress(self, _dir: str, filename: str, source: str, output: str):
-        match File.get_type(filename):
+    def compress(self, source: Path, output: Path):
+        """
+        It the core method for this program. Method determines file type and call compress function for it
+        :param source: Path of file to compress
+        :param output: Path of output file
+        :return: None
+        """
+        match File.get_type(source):
             case "audio":
-                out_file = self.audio(_dir, filename, output, self.params.audio_ext)
+                out_file = self.audio(source, output, self.__params.audio_ext)
             case "image":
-                out_file = self.image(_dir, filename, output, self.params.image_ext)
+                out_file = self.image(source, output, self.__params.image_ext)
             case "video":
-                out_file = self.video(_dir, filename, output, self.params.video_ext)
+                out_file = self.video(source, output, self.__params.video_ext)
             case "unknown":
-                out_file = self.unknown(_dir, filename, output)
+                out_file = self.unknown(source, output)
 
-        if self.params.mimic_mode:
-            self.utils.mimic_rename(out_file, path.join(_dir, filename), source)
-
-        self.printer.bar.update()
-        self.printer.bar.next()
+        self.__utils.out_rename(out_file, source)
+        self.__printer.bar.update()
+        self.__printer.bar.next()
diff --git a/vnrecode/params.py b/vnrecode/params.py
index ea15691..d0388f2 100644
--- a/vnrecode/params.py
+++ b/vnrecode/params.py
@@ -1,12 +1,16 @@
 from argparse import ArgumentParser, Namespace
 from dataclasses import dataclass
+from pathlib import Path
 from typing import Self
 import tomllib
-import os
 
 @dataclass
 class Params:
 
+    """
+    This dataclass contains all parameters for utility
+    """
+
     copy_unprocessed: bool
     force_compress: bool
     mimic_mode: bool
@@ -28,13 +32,18 @@ class Params:
     video_ext: str
     video_codec: str
 
-    source: str
+    source: Path
+    dest: Path
 
     @classmethod
     def setup(cls) -> Self:
+        """
+        Method initialize all parameters and returns class instance
+        :return: Params instance
+        """
         args = cls.get_args()
         if args.config is not None:
-            if os.path.isfile(args.config):
+            if Path(args.config).is_file():
                 with open(args.config, "rb") as cfile:
                     config = tomllib.load(cfile)
             else:
@@ -58,17 +67,22 @@ class Params:
         video_skip = config["VIDEO"]["SkipVideo"] if args.config else args.v_skip
         video_ext = config["VIDEO"]["Extension"] if args.config else args.v_ext
         video_codec = config["VIDEO"]["Codec"] if args.config else args.v_codec
-        source = args.source
+        source = Path(args.source)
+        dest = Path(f"{args.source}_compressed")
 
         return cls(
             copy_unprocessed, force_compress, mimic_mode, hide_errors, webp_rgba, workers,
             audio_ext, audio_bitrate,
             image_downscale, image_ext, image_fall_ext, image_lossless, image_quality,
-            video_crf, video_skip, video_ext, video_codec, source
+            video_crf, video_skip, video_ext, video_codec, source, dest
         )
 
     @staticmethod
     def get_args() -> Namespace:
+        """
+        Method gets CLI arguments and returns argparse.Namespace instance
+        :return: argparse.Namespace of CLI args
+        """
         parser = ArgumentParser(prog="vnrecode",
                                 description="Python utility to compress Visual Novel Resources"
                                 )
diff --git a/vnrecode/printer.py b/vnrecode/printer.py
index 30aa496..19650aa 100644
--- a/vnrecode/printer.py
+++ b/vnrecode/printer.py
@@ -1,46 +1,93 @@
 from progress.bar import IncrementalBar
+from pathlib import Path
 import colorama
 import sys
 import os
-
+import re
 
 class Printer:
+    """
+    Class implements CLI UI for this utility
+    """
 
-    def __init__(self, folder):
+    def __init__(self, source: Path):
+        """
+        :param source: Path of original (compressing) folder to count its files for progress bar
+        """
         file_count = 0
-        for folder, folders, file in os.walk(folder):
+        for folder, folders, file in os.walk(source):
             file_count += len(file)
         self.bar = IncrementalBar('Compressing', max=file_count, suffix='[%(index)d/%(max)d] (%(percent).1f%%)')
         self.bar.update()
 
-    # Fill whole string with spaces for cleaning progress bar
     @staticmethod
     def clean_str(string: str) -> str:
-        return string + " " * (os.get_terminal_size().columns - len(string))
+        """
+        Method fills end of string with spaces to remove progress bar garbage from console
+        :param string: String to "clean"
+        :return: "Clean" string
+        """
+        ansi_escape = re.compile(r'\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/]*[@-~])')
+        return string + " " * (os.get_terminal_size().columns - len(ansi_escape.sub('', string)))
 
     @staticmethod
     def win_ascii_esc():
+        """
+        Method setups colorama for cmd
+        :return: None
+        """
         if sys.platform == "win32":
             colorama.init()
 
     def bar_print(self, string: str):
+        """
+        Method prints some string in console and updates progress bar
+        :param string: String to print
+        :return: None
+        """
         print(string)
         self.bar.update()
 
     def info(self, string: str):
+        """
+        Method prints string with decor for info messages
+        :param string: String to print
+        :return: None
+        """
         self.bar_print(self.clean_str(f"\r\033[100m- {string}\033[49m"))
 
     def warning(self, string: str):
+        """
+        Method prints string with decor for warning messages
+        :param string: String to print
+        :return: None
+        """
         self.bar_print(self.clean_str(f"\r\033[93m!\033[0m {string}\033[49m"))
 
     def error(self, string: str):
+        """
+        Method prints string with decor for error messages
+        :param string: String to print
+        :return: None
+        """
         self.bar_print(self.clean_str(f"\r\033[31m\u2715\033[0m {string}\033[49m"))
 
-    def files(self, source: str, dest: str, dest_ext: str, comment: str):
-        source_ext = os.path.splitext(source)[1]
-        source_name = os.path.splitext(source)[0]
+    def files(self, source_path: Path, output_path: Path, comment: str):
+        """
+        Method prints the result of recoding a file with some decorations in the form:
+        input file name -> output file name (quality setting)
+        :param source_path: Input file Path
+        :param output_path: Output file Path
+        :param comment: Comment about recode quality setting
+        :return: None
+        """
+        self.bar_print(self.clean_str(f"\r\033[0;32m\u2713\033[0m \033[0;37m{source_path.stem}\033[0m{source_path.suffix}\033[0;37m -> "
+                                      f"{source_path.stem}\033[0m{output_path.suffix}\033[0;37m ({comment})\033[0m"))
 
-        self.bar_print(self.clean_str(f"\r\033[0;32m\u2713\033[0m \033[0;37m{source_name}\033[0m{source_ext}\033[0;37m -> {dest}\033[0m.{dest_ext}\033[0;37m ({comment})\033[0m"))
-
-    def unknown_file(self, file):
-        self.bar_print(self.clean_str(f"\r* \033[0;33m{file}\033[0m (File will be force compressed via ffmpeg)"))
+    def unknown_file(self, filename: str):
+        """
+        Method prints the result of recoding unknown file
+        :param filename: Name of unknown file
+        :return:
+        """
+        self.bar_print(self.clean_str(f"\r\u2713 \033[0;33m{filename}\033[0m (File will be force compressed via ffmpeg)"))
diff --git a/vnrecode/utils.py b/vnrecode/utils.py
index 3410eae..c30abe3 100644
--- a/vnrecode/utils.py
+++ b/vnrecode/utils.py
@@ -1,94 +1,136 @@
 from shutil import copyfile
-from glob import glob
+from pathlib import Path
+import hashlib
 import sys
 import os
-import re
 
-import fnmatch
+from vnrecode.printer import Printer
+from vnrecode.params import Params
 
 
 class Utils:
+    """
+    Class contains various methods for internal utility use
+    """
 
-    def __init__(self, params, printer):
-        self.errors = 0
-        self.params = params
-        self.printer = printer
-        self.duplicates = []
+    def __init__(self, params_inst: Params, printer_inst: Printer):
+        self.__errors = 0
+        self.__params = params_inst
+        self.__printer = printer_inst
+        self.__duplicates = {}
 
     @staticmethod
     def sys_pause():
+        """
+        Method calls pause for Windows cmd shell
+        :return: None
+        """
         if sys.platform == "win32":
             os.system("pause")
 
     @staticmethod
-    def get_size(directory: str) -> int:
-        total_size = 0
-        for folder, folders, files in os.walk(directory):
-            for file in files:
-                if not os.path.islink(os.path.join(folder, file)):
-                    total_size += os.path.getsize(os.path.join(folder, file))
-        return total_size
+    def get_hash(filename: str) -> str:
+        """
+        Method returns 8 chars of md5 hash for filename
+        :param filename: File name to get md5
+        :return: 8 chars of md5 hash
+        """
+        return hashlib.md5(filename.encode()).hexdigest()[:8]
 
-    def get_compression(self, source: str, output: str):
+    def get_recode_status(self):
+        """
+        Method prints recoding results
+        :return: None
+        """
+        source_len = 0
+        output_len = 0
+
+        for folder, folders, files in os.walk(self.__params.source):
+            source_len += len(files)
+
+        for folder, folders, files in os.walk(self.__params.dest):
+            for file in files:
+                if not file.count("(vncopy)"):
+                    output_len += 1
+
+        if self.__errors != 0:
+            self.__printer.warning("Some files failed to compress!")
+
+        if source_len == output_len:
+            self.__printer.info("Success!")
+        else:
+            self.__printer.warning("Original and compressed folders are not identical!")
         try:
-            source = self.get_size(source)
-            output = self.get_size(output)
+            source = sum(file.stat().st_size for file in self.__params.source.glob('**/*') if file.is_file())
+            output = sum(file.stat().st_size for file in self.__params.dest.glob('**/*') if file.is_file())
 
             print(f"\nResult: {source/1024/1024:.2f}MB -> "
                   f"{output/1024/1024:.2f}MB ({(output - source)/1024/1024:.2f}MB)")
         except ZeroDivisionError:
-            self.printer.warning("Nothing compressed!")
+            self.__printer.warning("Nothing compressed!")
 
-    def get_compression_status(self, source: str):
-        source_len = 0
-        output_len = 0
+    def catch_unprocessed(self, input_path: Path, output_path: Path, error):
+        """
+        Method processes files that have not been recoded due to an error and prints error to console
+        if hide_errors parameter is False
+        :param input_path: Path of unprocessed file
+        :param output_path: Destination path of unprocessed file
+        :param error: Recoding exception
+        :return: None
+        """
+        self.copy_unprocessed(input_path, output_path)
+        self.__errors += 1
+        if not self.__params.hide_errors:
+            self.__printer.error(f"File {input_path.name} can't be processed! Error: {error}")
 
-        for folder, folders, files in os.walk(source):
-            source_len += len(files)
+    def copy_unprocessed(self, input_path: Path, output_path: Path):
+        """
+        Method copies an unprocessed file from the source folder to the destination folder
+        :param input_path: Path of unprocessed file
+        :param output_path: Destination path of unprocessed file
+        :return: None
+        """
+        if self.__params.copy_unprocessed:
+            copyfile(input_path, output_path)
+            self.__printer.info(f"File {input_path.name} copied to compressed folder.")
 
-        for folder, folders, files in os.walk(f'{source}_compressed'):
-            for file in files:
-                if not os.path.splitext(file)[1].count("(copy)"):
-                    output_len += 1
-
-        if self.errors != 0:
-            self.printer.warning("Some files failed to compress!")
-
-        if source_len == output_len:
-            self.printer.info("Success!")
-        else:
-            self.printer.warning("Original and compressed folders are not identical!")
-        self.get_compression(source, f"{source}_compressed")
-
-    def add_unprocessed_file(self, source: str, output: str):
-        if self.params.copy_unprocessed:
-            filename = os.path.split(source)[-1]
-            copyfile(source, output)
-            self.printer.info(f"File {filename} copied to compressed folder.")
-
-    def check_duplicates(self, source: str, output: str, filename: str) -> str:
-        re_pattern = re.compile(os.path.splitext(filename)[0]+r".[a-zA-Z0-9]+$", re.IGNORECASE)
-        duplicates = [name for name in os.listdir(source) if re_pattern.match(name)]
-
-        if len(duplicates) > 1:
-            if filename.lower() not in (duplicate.lower() for duplicate in self.duplicates):
-                self.duplicates.append(filename)
-                new_name = os.path.splitext(filename)[0] + "(vncopy)" + os.path.splitext(filename)[1]
-                return os.path.join(output, new_name)
-        return os.path.join(output, filename)
+    def catch_duplicates(self, path: Path) -> Path:
+        """
+        Method checks if file path exists and returns folder/filename(vncopy).ext path
+        if duplicate founded
+        :param path: Some file Path
+        :return: Duplicate path name with (vncopy) on end
+        """
+        if path.is_file() and path.exists():
+            orig_name = path.name.replace("(vncopy)", "")
+            new_path = Path(path.parent, path.stem + "(vncopy)" + path.suffix)
+            try: self.__duplicates[orig_name]
+            except KeyError: self.__duplicates[orig_name] = []
+            if not new_path.name in self.__duplicates[orig_name]:
+                self.__duplicates[orig_name].append(new_path.name)
+            return self.catch_duplicates(new_path)
+        return path
 
     def print_duplicates(self):
-        for filename in self.duplicates:
-            self.printer.warning(
-                f'Duplicate file has been found! Check manually this files - "{filename}", '
-                f'"{os.path.splitext(filename)[0] + "(vncopy)" + os.path.splitext(filename)[1]}"'
+        """
+        Method prints message about all duplicates generated during recode process
+        :return: None
+        """
+        for filename in self.__duplicates.keys():
+            self.__printer.warning(
+                f'Duplicate file has been found! Check manually this files - "{filename}", ' +
+                ', '.join(self.__duplicates[filename])
             )
 
-    def mimic_rename(self, filename: str, target: str, source: str):
-        if filename.count("(vncopy)"):
-            orig_name = filename.replace("(vncopy)", "")
-            index = self.duplicates.index(os.path.split(orig_name)[-1])
-            self.duplicates[index] = os.path.split(target)[-1]
-            target = os.path.splitext(target)[0] + "(vncopy)" + os.path.splitext(target)[1]
-
-        os.rename(filename, target.replace(source, f"{source}_compressed"))
\ No newline at end of file
+    def out_rename(self, out_path: Path, target: Path):
+        """
+        Method removes md5 hash from file name and changes file extension in dependence of mimic mode
+        :param out_path: Recoded file Path
+        :param target: Target filename
+        :return: None
+        """
+        if not self.__params.mimic_mode:
+            dest_name = self.catch_duplicates(Path(out_path.parent, target.stem+out_path.suffix))
+            os.rename(out_path, dest_name)
+        else:
+            os.rename(out_path, Path(out_path.parent, target.name))