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#!/usr/bin/env python3
import os.path
from argparse import ArgumentParser
from datetime import datetime, timedelta
DATETIME_FORMAT = '%Y-%m-%d-%H.%M.%S'
def chunks(lst, n):
for i in range(0, len(lst), n):
yield lst[i:i + n]
def time2seconds(time: str) -> int:
time, frac = time.split('.')
frac = int(frac)
h, m, s = [int(i) for i in time.split(':')]
return round(s + m*60 + h*3600 + frac/1000)
def filename_to_datetime(filename: str) -> datetime:
filename = os.path.basename(filename).replace('record_', '').replace('.mp4', '')
return datetime.strptime(filename, DATETIME_FORMAT)
if __name__ == '__main__':
parser = ArgumentParser()
parser.add_argument('--source-filename', type=str, required=True,
help='recording filename')
parser.add_argument('--timecodes', type=str, required=True,
help='timecodes')
parser.add_argument('--padding', type=int, default=2,
help='amount of seconds to add before and after each fragment')
arg = parser.parse_args()
if arg.padding < 0:
raise ValueError('invalid padding')
timecodes = arg.timecodes.split(',')
if len(timecodes) % 2 != 0:
raise ValueError('invalid number of timecodes')
timecodes = list(map(time2seconds, timecodes))
timecodes = list(chunks(timecodes, 2))
# sort out invalid fragments (dvr-scan returns them sometimes, idk why...)
timecodes = list(filter(lambda f: f[0] < f[1], timecodes))
if not timecodes:
raise ValueError('no valid timecodes')
file_dt = filename_to_datetime(arg.source_filename)
# https://stackoverflow.com/a/43600953
timecodes.sort(key=lambda interval: interval[0])
merged = [timecodes[0]]
for current in timecodes:
previous = merged[-1]
if current[0] <= previous[1]:
previous[1] = max(previous[1], current[1])
else:
merged.append(current)
for fragment in merged:
start, end = fragment
start -= arg.padding
end += arg.padding
if start < 0:
start = 0
duration = end - start
dt1 = (file_dt + timedelta(seconds=start)).strftime(DATETIME_FORMAT)
dt2 = (file_dt + timedelta(seconds=end)).strftime(DATETIME_FORMAT)
filename = f'{dt1}__{dt2}.mp4'
print(f'{start} {duration} {filename}')
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