Errors in "merge" audio and video without downloading?

[Ipokrit]

   Hi,
   It seems I found two errors in how the script works with "--skip-download" key

vimeo-download/vimeo-download.py

Lines 150 to 152 in 908c838

	parser.add_argument("-s", "--skip-download", action="store",
	help="merges video and audio output of already downloaded streams",
	metavar="TIMESTAMP")

   First. When downloading audio and video files are saved in a temporary folder, the name of which ("OUT_PREFIX") is obtained by joining "TIMESTAMP" and "SALT".

vimeo-download/vimeo-download.py

Lines 20 to 23 in 908c838

	# Prefix for this run
	TIMESTAMP = datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
	SALT = ''.join(random.choice(string.digits) for _ in range(3))
	OUT_PREFIX = TIMESTAMP + '-' + SALT

But the argument of "--skip-download" key replaces only the first half.

vimeo-download/vimeo-download.py

Lines 182 to 184 in 908c838

	if args.skip_download:
	TIMESTAMP = args.skip_download
	print("Overriding timestamp with:", TIMESTAMP)

And as "SALT" is still generated randomly we get incorrect folder address with previously downloaded video.

   And second. When the script works with "--skip-download" key, it first creates "OUT_PREFIX" from "TIMESTAMP" and "SALT", then change "TIMESTAMP", but the value "OUT_PREFIX" remains the same! As a result, we all the more do not get the correct address previously downloaded video.