feat: add SYNC command to merge entries with delta
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parent
07ef135a82
commit
50d8e6d261
1 changed files with 72 additions and 25 deletions
97
merge_srt.py
97
merge_srt.py
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@ -63,18 +63,60 @@ def read_commands(filename):
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except (ValueError, AttributeError):
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continue
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commands.append(('MAP', text_source, text_start, time_source, time_start, count))
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elif command == 'SYNC':
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if len(parts) != 3:
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continue
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try:
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source1_index = int(parts[1])
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source2_index = int(parts[2])
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except (ValueError, AttributeError):
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continue
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commands.append(('SYNC', source1_index, source2_index))
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else:
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continue
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return commands
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def parse_timestamp(ts_str):
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start_str, end_str = ts_str.split(' --> ')
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def parse_part(part):
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parts = part.split(':')
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hours = int(parts[0])
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minutes = int(parts[1])
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sec_ms = parts[2].split(',')
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seconds = int(sec_ms[0])
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ms = int(sec_ms[1])
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return hours * 3600000 + minutes * 60000 + seconds * 1000 + ms
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return parse_part(start_str), parse_part(end_str)
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def compute_delta(prev_ts_str, curr_ts_str):
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prev_start, _ = parse_timestamp(prev_ts_str)
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curr_start, _ = parse_timestamp(curr_ts_str)
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return curr_start - prev_start
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def format_time(ms):
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total_seconds = ms // 1000
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ms_part = ms % 1000
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hours = total_seconds // 3600
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minutes = (total_seconds // 60) % 60
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seconds = total_seconds % 60
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return hours, minutes, seconds, ms_part
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def format_timestamp(start_ms, end_ms):
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def format_part(h, m, s, ms):
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return f"{h:02}:{m:02}:{s:02},{ms:03}"
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start_h, start_m, start_s, start_ms_part = format_time(start_ms)
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end_h, end_m, end_s, end_ms_part = format_time(end_ms)
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return f"{format_part(start_h, start_m, start_s, start_ms_part)} --> {format_part(end_h, end_m, end_s, end_ms_part)}"
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def add_delta_to_timestamp(ts_str, delta):
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start, end = parse_timestamp(ts_str)
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return format_timestamp(start + delta, end + delta)
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if __name__ == '__main__':
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if len(sys.argv) != 5:
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print("Usage: python merge_srt.py <srt1> <srt2> <commands> <output>")
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sys.exit(1)
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srt1_filename = sys.argv[1]
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srt2_filename = sys.argv[2]
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commands_filename = sys.argv[3]
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output_filename = sys.argv[4]
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srt1_filename, srt2_filename, commands_filename, output_filename = sys.argv[1:5]
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srt1 = parse_srt(srt1_filename)
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srt2 = parse_srt(srt2_filename)
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@ -83,42 +125,47 @@ if __name__ == '__main__':
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output = []
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for cmd in commands:
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if cmd[0] == 'COPY':
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_, source, start, end = cmd
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source, start, end = cmd[1:]
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source_list = srt1 if source == 1 else srt2
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start_idx = start - 1
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end_idx = end - 1
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start_idx, end_idx = start - 1, end - 1
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if start_idx < 0 or end_idx >= len(source_list) or start_idx > end_idx:
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print(f"Skipping invalid COPY command: source {source}, range {start}-{end}")
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continue
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entries = source_list[start_idx:end_idx + 1]
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output.extend(entries)
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output.extend(source_list[start_idx:end_idx + 1])
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elif cmd[0] == 'MAP':
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_, text_source, text_start, time_source, time_start, count = cmd
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text_source, text_start, time_source, time_start, count = cmd[1:]
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text_list = srt1 if text_source == 1 else srt2
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time_list = srt1 if time_source == 1 else srt2
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text_start_idx = text_start - 1
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time_start_idx = time_start - 1
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if text_start_idx < 0 or text_start_idx + count > len(text_list):
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print(f"Skipping invalid MAP command: text source {text_source}, start {text_start}, count {count}")
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continue
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if time_start_idx < 0 or time_start_idx + count > len(time_list):
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print(f"Skipping invalid MAP command: time source {time_source}, start {time_start}, count {count}")
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if (text_start_idx < 0 or text_start_idx + count > len(text_list) or
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time_start_idx < 0 or time_start_idx + count > len(time_list)):
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print(f"Skipping invalid MAP command: text source {text_source}, start {text_start}, count {count} or time source {time_source}, start {time_start}, count {count}")
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continue
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for i in range(count):
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text_entry = text_list[text_start_idx + i]
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time_entry = time_list[time_start_idx + i]
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new_entry = {
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output.append({
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'index': len(output) + 1,
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'timestamp': time_entry['timestamp'],
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'text': text_entry['text'],
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}
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output.append(new_entry)
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})
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elif cmd[0] == 'SYNC':
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source1_index, source2_index = cmd[1:]
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if source1_index < 2 or source1_index > len(srt1) or source2_index < 1 or source2_index > len(srt2):
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print(f"Skipping invalid SYNC command: source1 index {source1_index} must be >=2 and <= {len(srt1)}, source2 index {source2_index} must be >=1 and <= {len(srt2)}")
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continue
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entry_prev = srt1[source1_index - 2]
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entry1 = srt1[source1_index - 1]
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entry2 = srt2[source2_index - 1]
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delta = compute_delta(entry_prev['timestamp'], entry1['timestamp'])
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new_ts = add_delta_to_timestamp(entry2['timestamp'], delta)
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output.append({
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'index': len(output) + 1,
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'timestamp': new_ts,
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'text': entry2['text'],
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})
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with open(output_filename, 'w', encoding='utf-8') as f:
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for entry in output:
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f.write(f"{entry['index']}\n")
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f.write(entry['timestamp'] + '\n')
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text = entry['text'].strip()
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for line in text.split('\n'):
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f.write(line + '\n')
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f.write('\n')
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for i, entry in enumerate(output, start=1):
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f.write(f"{i}\n{entry['timestamp']}\n{entry['text'].strip()}\n\n")
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