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| import argparse
import codecs
import math
import os
import re
SUPPORTED_EXTENSIONS = [".xml", ".vtt"]
def leading_zeros(value, digits=2):
value = "000000" + str(value)
return value[-digits:]
def convert_time(raw_time):
if int(raw_time) == 0:
return "{}:{}:{},{}".format(0, 0, 0, 0)
ms = '000'
if len(raw_time) > 4:
ms = leading_zeros(int(raw_time[:-4]) % 1000, 3)
time_in_seconds = int(raw_time[:-7]) if len(raw_time) > 7 else 0
second = leading_zeros(time_in_seconds % 60)
minute = leading_zeros(int(math.floor(time_in_seconds / 60)) % 60)
hour = leading_zeros(int(math.floor(time_in_seconds / 3600)))
return "{}:{}:{},{}".format(hour, minute, second, ms)
def xml_id_display_align_before(text):
"""
displayAlign="before" means the current sub will be displayed on top.
That is and not at bottom. We check what's the xml:id associated to it
to have an {\an8} position tag in the output file.
"""
align_before_re = re.compile(u'<region.*tts:displayAlign=\"before\".*xml:id=\"(.*)\"/>')
has_align_before = re.search(align_before_re, text)
if has_align_before:
return has_align_before.group(1)
return u""
def xml_get_cursive_style_ids(text):
style_section = re.search("<styling>(.*)</styling>", text, flags=re.DOTALL)
if not style_section:
return []
style_ids_re = re.compile(
'<style.* tts:fontStyle="italic".* xml:id=\"([a-zA-Z0-9_.]+)\"')
return [re.search(style_ids_re, line).groups()[0]
for line in style_section.group().split("\n")
if re.search(style_ids_re, line)]
def xml_cleanup_spans_start(span_id_re, cursive_ids, text):
has_cursive = []
span_start_tags = re.findall(span_id_re, text)
for s in span_start_tags:
has_cursive.append(u"<i>" if s[1] in cursive_ids else u"")
text = has_cursive[-1].join(text.split(s[0], 1))
return text, has_cursive
def xml_cleanup_spans_end(span_end_re, text, has_cursive):
span_end_tags = re.findall(span_end_re, text)
for s, cursive in zip(span_end_tags, has_cursive):
cursive = u"</i>" if cursive else u""
text = cursive.join(text.split(s, 1))
return text
def to_srt(text, extension):
if extension.lower() == ".xml":
return xml_to_srt(text)
if extension.lower() == ".vtt":
return vtt_to_srt(text)
def format_text(line):
line = line.replace("‎","",1)
while line.find("<")!=-1:
indexa = line.find("<")
indexb = line.find(">")
line = line.replace(line[indexa:indexb+1],"")
return line
def convert_vtt_time(line):
times = line.replace(".", ",").split(" --> ")
if len(times[0]) == 9:
times = ["00:" + t for t in times]
return "{} --> {}".format(times[0], times[1].split(" ")[0])
def vtt_to_srt(text):
if not text.startswith(u"\ufeffWEBVTT") and not text.startswith(u"WEBVTT"):
raise Exception(".vtt format must start with WEBVTT, wrong file?")
lines = []
current_sub_line = []
for line in text.split("\n"):
if current_sub_line:
line = format_text(line)
current_sub_line.append(line)
if not line or line=="\r":
lines.append("\n".join(current_sub_line) + "\n")
current_sub_line = []
elif " --> " in line:
current_sub_line = [convert_vtt_time(line)]
if current_sub_line:
lines.append("\n".join(current_sub_line))
return "".join((u"{}\n{}".format(i, l) for i, l in enumerate(lines, 1)))
def xml_to_srt(text):
def append_subs(start, end, prev_content, format_time):
subs.append({
"start_time": convert_time(start) if format_time else start,
"end_time": convert_time(end) if format_time else end,
"content": u"\n".join(prev_content),
})
display_align_before = xml_id_display_align_before(text)
begin_re = re.compile(u"\s*<p begin=")
sub_lines = (l for l in text.split("\n") if re.search(begin_re, l))
subs = []
prev_time = {"start": 0, "end": 0}
prev_content = []
start = end = ''
start_re = re.compile(u'begin\="([0-9:\.]*)')
end_re = re.compile(u'end\="([0-9:\.]*)')
content_re = re.compile(u'\">(.*)</p>')
cursive_ids = xml_get_cursive_style_ids(text)
span_id_re = re.compile(u'(<span style=\"([a-zA-Z0-9_.]+)\">)+')
span_end_re = re.compile(u'(</span>)+')
br_re = re.compile(u'(<br\s*\/?>)+')
fmt_t = True
for s in sub_lines:
s, has_cursive = xml_cleanup_spans_start(
span_id_re, cursive_ids, s)
string_region_re = r'<p(.*region="' + display_align_before + r'".*")>(.*)</p>'
s = re.sub(string_region_re, r'<p\1>{\\an8}\2</p>', s)
content = re.search(content_re, s).group(1)
br_tags = re.search(br_re, content)
if br_tags:
content = u"\n".join(content.split(br_tags.group()))
content = xml_cleanup_spans_end(
span_end_re, content, has_cursive)
prev_start = prev_time["start"]
start = re.search(start_re, s).group(1)
end = re.search(end_re, s).group(1)
if len(start.split(":")) > 1:
fmt_t = False
start = start.replace(".", ",")
end = end.replace(".", ",")
if (prev_start == start and prev_time["end"] == end) or not prev_start:
prev_time = {"start": start, "end": end}
prev_content.append(content)
continue
append_subs(prev_time["start"], prev_time["end"], prev_content, fmt_t)
prev_time = {"start": start, "end": end}
prev_content = [content]
append_subs(start, end, prev_content, fmt_t)
lines = (u"{}\n{} --> {}\n{}\n".format(
s + 1, subs[s]["start_time"], subs[s]["end_time"], subs[s]["content"])
for s in range(len(subs)))
return u"\n".join(lines)
def main():
directory = "."
help_text = u"path to the {} directory (defaults to current directory)"
parser = argparse.ArgumentParser()
parser.add_argument("-i", "--input", type=str, default=directory,
help=help_text.format("input", directory))
parser.add_argument("-o", "--output", type=str, default=directory,
help=help_text.format("output", directory))
a = parser.parse_args()
filenames = [fn for fn in os.listdir(a.input)
if fn[-4:].lower() in SUPPORTED_EXTENSIONS]
for fn in filenames:
with codecs.open("{}/{}".format(a.input, fn), 'rb', "utf-8") as f:
text = f.read()
with codecs.open("{}/{}.srt".format(a.output, fn[:-4]), 'wb', "utf-8") as f:
f.write(to_srt(text, fn[-4:]))
if __name__ == '__main__':
main()
|