diff --git a/removeads.py b/removeads.py
index cd00e34..209a76d 100755
--- a/removeads.py
+++ b/removeads.py
@@ -17,6 +17,8 @@ from tqdm import tqdm, trange
 from select import select
 from math import floor, ceil, log
 from shutil import copyfile, which
+import hexdump
+
 
 # Useful SPS/PPS discussion
 # TODO: improve situation of SPS and PPS header mismatch when merging MVK with mkvmerge to remove warnings.
@@ -1092,12 +1094,18 @@ def main():
     parser.add_argument("-o", "--output", dest='outputFile', type=str, required=True, help="Output MKV file to produce.")
     parser.add_argument("-p", "--part", dest='parts', nargs='+', required=False, action='append', metavar="hh:mm:ss[.mmm]-hh:mm:ss[.mmm]", help="Extract this exact part of the original file.")
     parser.add_argument("-k", "--keep", action='store_true', help="Do not cleanup temporary files after processing.")
+    parser.add_argument("--safe", action='store_true', help="Suppress headers and trailers to only keep safe parts of the movie.")
+    parser.add_argument("-t", "--threshold", action='store', type=int, help="Suppress headers and trailers that are smaller than the threshold.")
+    parser.add_argument("-f", "--fusion", action='store_true', help="Collapse the trailer of a part with the header of the next (when it makes sense).")
     parser.add_argument("--dump-memory", action='store_true', dest='dump', help="For debug purpose, dump all memory mapping of headers (and trailers) before (after) each part. They are kept in memory only otherwise.")
     parser.add_argument("-s","--srt", action='store_true', dest='srt', help="Dump subtitles ")
   
     args = parser.parse_args()
     logger.debug("Arguments: %s" % args)
     
+    if args.threshold == None:
+        args.threshold = 0
+    
     allOptionalTools, paths = checkRequiredTools()
 
     # Flatten args.parts
@@ -1252,7 +1260,7 @@ def main():
         
         subparts = []
         
-        if nbHeadFrames > 0:
+        if nbHeadFrames > args.threshold:
             # We extract all frames between the beginning upto the frame that immediately preceeds the I-frame.
             head = extractAllStreams(ffmpeg=paths['ffmpeg'], ffprobe=paths['ffprobe'], inputFile=mkv, begin=ts1, end=headIFrameTS, nbFrames=nbHeadFrames-1, filesPrefix='part-%d-head' % (partnum), streams=streams, width=width, height=height, temporaries=temporaries, dumpMemFD=args.dump)
             # Change private codec data of the new file so that it is the same as the one of the original movie
@@ -1269,17 +1277,21 @@ def main():
         extractMKVPart(mkvmerge=paths['mkvmerge'], inputFile=mkv, outputFile=internal, begin=headIFrameTS, end=tailIFrameTS)
         subparts.append(internal)
         
-        if nbTailFrames > 0:
+        if nbTailFrames > args.threshold:
             # We extract all frames between the I-frame (including it) upto the end.
             tail = extractAllStreams(ffmpeg=paths['ffmpeg'], ffprobe=paths['ffprobe'], inputFile=mkv, begin=tailIFrameTS, end=ts2, nbFrames=nbTailFrames, filesPrefix='part-%d-tail' % (partnum), streams=streams, width=width, height=height, temporaries=temporaries, dumpMemFD=args.dump)
             # Change private codec data of the new file so that it is the same as the one of the original movie
             changeCodecPrivateData(paths['mkvinfo'], tail, codecData)
             subparts.append(tail)
         
-        logger.info('Merging: %s' % subparts)
-        part = mergeMKVs(inputs=subparts, outputName="part-%d.mkv" % partnum)
-        mkvparts.append(part)
-        temporaries.append(part)
+        if not args.fusion:
+            logger.info('Merging: %s' % subparts)
+            part = mergeMKVs(inputs=subparts, outputName="part-%d.mkv" % partnum)
+            mkvparts.append(part)
+            temporaries.append(part)
+        else:
+            logging.error("Not yet implemented")
+            exit(-1)
         
         pos = pos+tailIFrameTS-ts1