diff --git a/src/tscut/tscut.py b/src/tscut/tscut.py
index 928aa0e..7034794 100755
--- a/src/tscut/tscut.py
+++ b/src/tscut/tscut.py
@@ -110,24 +110,4 @@ def concatenate_h264_ts_parts(h264_ts_parts: Sequence[TextIO], output: TextIO) -
         if first:
             first = False
 
-# TODO: finish this procedure
-def do_coarse_processing(ffmpeg_path:str, ffprobe_path:str, mkvmerge_path:str,
-                         input_file: IO[bytes], begin, end, nb_frames, framerate,
-                         files_prefix, streams, width, height, temporaries, dump_mem_fd) -> None:
-    # pylint: disable=W0613
-    logger = logging.getLogger(__name__)
 
-    # Internal video with all streams (video, audio and subtitles)
-    internal_mkv_name = f'{files_prefix}.mkv'
-
-    try:
-        internal_mkv = open(internal_mkv_name, 'wb+')
-    except OSError:
-        logger.error('Impossible to create file: %s', internal_mkv_name)
-        exit(-1)
-
-    # Extract internal part of MKV
-    extract_mkv_part(mkvmerge_path=mkvmerge_path, input_file=input_file, output_file=internal_mkv,
-                     begin=begin, end=end)
-
-    temporaries.append(internal_mkv)