diff --git a/libconv.py b/libconv.py
index 6635e0f..abd2252 100644
--- a/libconv.py
+++ b/libconv.py
@@ -27,15 +27,14 @@ DST_OVERWRITE: bool = config.get("libconv", "overwrite") == "true"
 DRY_RUN: bool = config.get("libconv", "dry_run") != "false"
 DEDUCE_METADATA: bool = config.get("libconv", "deduce_metadata") == "true"
 FFMPEG_LOCATION: str = config.get("ffmpeg", "location")
-FFMPEG_OPTS: str = config.get("ffmpeg", "options")
-THREADS: int = int(config.get("libconv", "threads"))
+FFMPEG_OPTS: List[str] = config.get("ffmpeg", "options").split(",")
 
 if DST_OVERWRITE:
-    FFMPEG_OPTS += " -y"
+    FFMPEG_OPTS.append("-y")
 
 logging.basicConfig(level=logging.INFO)
 
-cmd_list: List[str] = []
+cmd_list = []
 
 # ----------------------------------------------------------------- #
 # file and folder operations
@@ -50,10 +49,9 @@ def mkdir(path: str):
     if not DRY_RUN:
         os.makedirs(path, exist_ok=True)
 
-def execute(command: str):
+def execute(command: List[str]):
     logging.debug(f"execute: {command}")
-    if not DRY_RUN:
-        cmd_list.append(command)
+    cmd_list.append(command)
 
 # ----------------------------------------------------------------- #
 # cue sheet processing
@@ -76,22 +74,24 @@ def cue_sheet_processor(path: str):
     try:
         data = FFCueSplitter(sheet[0], dry=DRY_RUN, outputdir=dst_folder, suffix=DST_FILE_EXT, overwrite=DST_OVERWRITE, ffmpeg_cmd=FFMPEG_LOCATION, ffmpeg_add_params=FFMPEG_OPTS)
         data.open_cuefile()
-        args = data.ffmpeg_arguments()["arguments"]
+        args = data.ffmpeg_arguments()
     except:
-        logging.error(f"Error during parsing of cuesheet {path} - trying file processor")
+        logging.error(f"Cuesheet parsing of {path} resulted in error. Trying file processor.")
         file_processor(path)
         return
 
     for arg in args:
-        arg_end = arg.find("-y")
-        filename = arg[arg_end + 5:-1]
-        arg = arg[:arg_end]
-        execute(f"{arg} \"{dst_folder}{filename}\"")
+        prepared = []
+        prepared.append(FFMPEG_LOCATION)
+        prepared.extend(arg[:-1])
+        prepared.extend(FFMPEG_OPTS)
+        prepared.append(f"\"{dst_folder}/{arg[-1]}.{DST_FILE_EXT}\"")
+        execute(prepared)
 
 # ----------------------------------------------------------------- #
 # basic "folder contains audio files" processing
 
-def metadata_from_folder(path: str) -> str:
+def metadata_from_folder(path: str) -> List[str]:
     # this method has to be adapted to your individual folder structure
     # if there is none then do nothing as by default this is not used
     if not DEDUCE_METADATA:
@@ -105,11 +105,14 @@ def metadata_from_folder(path: str) -> str:
     album_name = re.sub(r'[ ]*\(.*?\)', '', folders[-1])
     comment = folders[-1].replace(album_name, "").replace("(", "").replace(")", "").replace(" ","")
 
-    logging.debug(f"got metadata: album={album_name} comment={comment} artist={folders[-2]} genre={folders[-3]}")
-    
-    return f"-metadata ALBUM=\"{album_name}\" -metadata COMMENT=\"{comment}\" -metadata ARTIST=\"{folders[-2]}\" -metadata GENRE=\"{folders[-3]}\""
+    return [
+        f"-metadata ALBUM=\"{album_name}\"",
+        f"-metadata COMMENT=\"{comment}\"",
+        f"-metadata ARTIST=\"{folders[-2]}\"",
+        f"-metadata GENRE=\"{folders[-3]}\""
+    ]
 
-def metadata_from_file(filename: str) -> str:
+def metadata_from_file(filename: str) -> List[str]:
     title=""
     number=""
 
@@ -126,7 +129,10 @@ def metadata_from_file(filename: str) -> str:
     else:
         logging.debug(f"file {filename} matched no metadata regex")
 
-    return f"-metadata TITLE=\"{title}\" -metadata TRACK=\"{number}\""
+    return [
+        f"-metadata TITLE=\"{title}\"",
+        f"-metadata TRACK=\"{number}\""
+    ]
 
 def file_processor(path: str):
     dst_folder, preexisting = prepare_destination(path)
@@ -141,7 +147,15 @@ def file_processor(path: str):
     for file in files:
         filename = get_filename(file, path)
         file_metadata = metadata_from_file(filename[1:])
-        execute(f"\"{FFMPEG_LOCATION}\" -i \"{file}\" {FFMPEG_OPTS} {album_metadata} {file_metadata} \"{dst_folder + filename}.{DST_FILE_EXT}\"")
+        command = []
+        command.append(FFMPEG_LOCATION)
+        command.append("-i")
+        command.append(f"\"{file}\"")
+        command.extend(album_metadata)
+        command.extend(file_metadata)
+        command.extend(FFMPEG_OPTS)
+        command.append(f"\"{dst_folder}/{filename}.{DST_FILE_EXT}\"")
+        execute(command)
 
 # ----------------------------------------------------------------- #
 # Iteration over library folders and preparation
@@ -215,16 +229,16 @@ def process_folder(path: str):
         scan_folder(path)
 
 def execute_command_list():
-    logging.info(f"Executing all {len(cmd_list)} commands with {THREADS} parallel threads")
+    logging.info(f"Executing all {len(cmd_list)} commands")
 
     if DRY_RUN:
         logging.info("Skipping execution as we are dry-running. Printing list as debug-info.")
         logging.debug(str(cmd_list))
         return
 
-    Parallel(n_jobs=THREADS)(
-        delayed(os.system)(cmd) for cmd in cmd_list
-    )
+    for cmd in cmd_list:
+        cmd = " ".join(cmd)
+        subprocess.run(cmd, shell=True)
 
 if __name__ == "__main__":
     logging.info(f"Using settings from {CONFIG_FILE}")