68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
'''
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Usage:
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Shift all subtitles 10 seconds forward:
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> subtitle_shift file.srt +10
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Shift all subtitles 10 seconds backward:
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> subtitle_shift file.srt -10
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This will produce "file_correct.srt" with the new timestamps.
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'''
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import os
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import sys
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filename = sys.argv[1]
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offset = float(sys.argv[2])
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f = open(filename, 'r')
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lines = [l.strip() for l in f.readlines()]
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for (lineindex, line) in enumerate(lines):
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changed = False
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if '-->' not in line:
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continue
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words = line.split(' ')
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for (wordindex, word) in enumerate(words):
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word = word.replace('.', ',')
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if not (':' in word and ',' in word):
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continue
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if not word.replace(':', '').replace(',', '').isdigit():
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continue
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# 1.) 01:23:45,678 --> 02:34:56,789 | our input
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# 2.) 01:23:45:678 --> 02:34:56:789 | comma to colon
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# 3.) 5025.678 --> 9296.789 | split by colon and sum
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# 4.) 5035.678 --> 9306.789 | add offset
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# 5.) 01:23:55.678 --> 02:35:06.789 | reformat
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# 6.) 01:23:55,678 --> 02:35:06,789 | period to comma
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word = word.replace(',', ':')
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(hours, minutes, seconds, mili) = [int(x) for x in word.split(':')]
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seconds = (3600 * hours) + (60 * minutes) + (seconds) + (mili / 1000)
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seconds += offset
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(hours, seconds) = divmod(seconds, 3600)
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(minutes, seconds) = divmod(seconds, 60)
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if hours < 0:
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raise Exception('Negative time')
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word = '%02d:%02d:%06.3f' % (hours, minutes, seconds)
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word = word.replace('.', ',')
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changed = True
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words[wordindex] = word
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if changed:
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line = ' '.join(words)
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print(line)
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lines[lineindex] = line
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lines = '\n'.join(lines)
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(name, extension) = os.path.splitext(filename)
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newname = name + '_correct' + extension
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x = open(newname, 'w')
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x.write(lines)
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x.close()
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