Les sous-titres SubRip, d'extension srt, sont les plus répandus sur Internet, notamment du fait de leur simplicité. Ces sous-titres sont au format suivant :

1
00:03:54,705 --> 00:03:59,233
Texte du premier sous titre qui
peut s'étaler sur plusieurs
lignes.

2
00:04:04,705 --> 00:04:09,233
On peut mettre du texte
en <i>italique</i> mot par mot.

Les sous-titres Advanced Sub Station Alpha, d'extensions ass ou ssa, permettent en plus de styliser le texte affiché, avec de multiples styles que l'on peut créer soit même. Il est notamment possible de choisir la police à utiliser, la taille du texte, sa couleur d'avant plan, d'arrière plan, de contour, si le texte est gras, italique, souligné et bien d'autres choses comme des décalages ou des rotations…

L'intérêt minimal de l'Advanced Sub Station Alpha contre le SubRip est notamment celui de pouvoir définir un contour au texte. Texte blanc et contour noir par exemple et fini les horribles sous-titres blancs sur fonds blancs.

Ce sous-titre est également au format texte :

Dialogue: 0,0:03:54.70,0:03:59.23,Regular,,0000,0000,0000,,Texte du premier sous titre qui\Npeut s'étaler sur plusieurs\Nlignes.
Dialogue: 0,0:04:04.70,0:04:09.23,Regular,,0000,0000,0000,,On ne peut pas mettre du texte\Nen italique mot par mot.
Dialogue: 0,0:04:14.70,0:04:15.23,Italic,,0000,0000,0000,,Mais sur une ligne entière oui.\NOu sur plusieurs lignes aussi.

Téléchargez le fichier ci-dessous et rendez-le exécutable.

Pour obtenir de l'aide : srt2ass.py -h ou srt2ass.py –help

Supporte les fichiers SRT encodés en ISO-8859-1, UTF-8, UTF-16 (LE/BE), UTF-32 (LE/BE)

Converti les fichiers SRT en ASS et les encodes en UTF-8.

Correction des erreurs de caractères les plus fréquentes.

Comportement par défaut : srt2ass.py executé sans arguments convertira tous les fichiers SRT du dossier courant. Les fichiers SRT ne seront pas supprimés.

srt2ass.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import codecs
import argparse
import sys, os, glob
 
# Use this list to delete automatically subs containing one of the following words. All in lower case.
exclusion = ["subtitles by", "sync by", "<font", "synchro:", "sync:", "transcript:", "subtitles:", "subtitle:", "sync and corrections"]
 
class Console:
  verbose = False
 
  @classmethod
  def l(c, message, linefeed = True):
    sys.stdout.write(message)
    if linefeed:
      sys.stdout.write("\n")
 
  @classmethod
  def v(c, message, linefeed = True):
    if c.verbose:
      c.l(message, linefeed)
 
  @classmethod
  def w(c, message, linefeed = True):
    c.v("## Warning ## " + message, linefeed)
 
  @classmethod
  def nl(c):
    if c.verbose:
      sys.stdout.write("\n")
 
class SubElement:
 
  def __init__(self, start, end, text):
    self.timeStart = start
    self.timeEnd = end
    self.text = text
 
  def appendLine(self, text):
    text = text.lstrip().rstrip()
    if text != '':
      if self.text != '':
        self.text += "\n"
      self.text += text
 
  def __repr__(self):
    return self.text
 
class AdvancedSubStationAlphaWriter:
 
  def __init__(self, filename, subElements, regular, size):
    Console.v('Writing "' + filename + '"')
    self.fontRegular = regular
    self.fontSize = size
    self.filename = filename
    self.elements = subElements
    self.write()
 
  def write(self):
    f = open(self.filename, 'w')
    f.write(codecs.BOM_UTF8)
    f.write(self.getHeader())
    for e in self.elements:
      f.write(self.getLine(e))
    f.close()
 
  def getLine(self, element):
    start = self.getTime(element.timeStart)
    end = self.getTime(element.timeEnd)
    text = element.text.replace("\n", "\\N")
    font = "Regular"
 
    text = text.replace("<i>", "{\\i1}").replace("</i>", "{\\i0}")
    # Fixes the subtitle
    if text.find("{\\i1}") != -1 and text.find("{\\i0}") == -1:
      text += "{\\i0}"
 
    return "Dialogue: 0,{0},{1},{2},,0000,0000,0000,,{3}\n".format(start, end, font, text)
 
  def getTime(self, t):
    ms = t % 1000
    t = (t - ms) / 1000
    s = t % 60
    t = (t - s) / 60
    m = t % 60
    h = (t - m) / 60
 
    ms /= 10
    return '{0:01}:{1:02}:{2:02}.{3:02}'.format(h, m, s, ms)
 
  def getHeader(self):
    return "[Script Info]\n" \
        + "ScriptType: V4.00+\n" \
        + "\n"                   \
        + "[V4+ Styles]\n"       \
        + "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding\n" \
        + "Style: Regular," + self.fontRegular + "," + self.fontSize + ",&H00FFFFFF,&H0000FFFF,&H00000000,&H00000000,-1,0,0,0,100,100,0,0,1,1,1,2,20,20,20,0\n" \
        + "\n" \
        + "[Events]\n" \
        + "Format: Layer, Start, End, Style, Actor, MarginL, MarginR, MarginV, Effect, Text\n"
 
#+ "Style: Italic," + self.fontItalic + "," + self.fontSize + ",&H00FFFFFF,&H0000FFFF,&H00000000,&H00000000,-1,-1,0,0,100,100,0,0,1,1,1,2,20,20,20,0\n" \
 
 
class SubRipReader:
 
  def __init__(self, filename):
    Console.v('Reading "' + filename + '"')
    self.filename = filename
    self.bomLength = 0
    self.encoding = 'utf-8'
    self.lines = []
    self.elements = []
    self.detectBomAndEncoding()
    self.read()
    self.parse()
 
  def detectBomAndEncoding(self):
    f = open(self.filename, 'r')
    begin = f.read(4)
    f.close()
    if begin.startswith(codecs.BOM_UTF8):
      self.encoding = 'utf-8'
      self.bomLength = 3
    elif begin.startswith(codecs.BOM_UTF16_LE):
      self.encoding = 'utf-16-le'
      self.bomLength = 2
    elif begin.startswith(codecs.BOM_UTF16_BE):
      self.encoding = 'utf-16-be'
      self.bomLength = 2
    elif begin.startswith(codecs.BOM_UTF32_LE):
      self.encoding = 'utf-32-le'
      self.bomLength = 4
    elif begin.startswith(codecs.BOM_UTF32_BE):
      self.encoding = 'utf-32-be'
      self.bomLength = 4
 
    if self.bomLength > 0:
      Console.v('BOM detected! Encoding: ' + self.encoding)
    else:
      Console.v('No BOM found. Using utf-8 as default encoding.')
 
  def read(self):
    if not self.read2():
      Console.v('Fail to read the file with ' + self.encoding + '. Trying iso-8859-1.')
      self.encoding = 'iso-8859-1'
      self.read2()
 
  def read2(self):
    try:
      f = codecs.open(self.filename, 'r', self.encoding)
      self.lines = f.readlines()
      f.close()
      if len(self.lines) > 0 and self.bomLength > 0:
        self.lines[0] = self.lines[0].encode('utf-8').decode('utf-8-sig')
    except:
      return False
    return True
 
  def parse(self):
    el = None
    isJustNew = False
    nextCountReady = True
    count = 0
    emptySub = []
    skip = False
    for line in self.lines:
      l = line.encode('utf-8')    \
        .replace("\n", "")        \
        .replace("\r", "")
      if isJustNew:
        skip = False
        isJustNew = False
        nextCountReady = False
        times = l.split(' --> ')
        el.timeStart = self.parseTime(times[0])
        el.timeEnd = self.parseTime(times[1])
      elif nextCountReady and l.isdigit():
        count += 1
        Console.v("Reading SRT #" + str(l) + "\r", False)
        if int(l) != count:
          Console.nl()
          Console.w("Bad SRT number! Found: #" + str(l) + ", but should be #" + str(count))
        if el != None:
          if el.text == '':
            emptySub.append(count - 1)
          else:
            self.elements.append(el)
        el = SubElement(0, 0, '')
        isJustNew = True
      else:
        if not skip:
          skip = self.exclude(l)
        if skip:
          Console.nl()
          Console.w("Skipping SRT '" + l + "'")
        elif len(l) > 0:
          l = l.replace("œ", "œ")   \
            .replace("’", "’")      \
            .replace("“", "“")      \
            .replace("”", "”")      \
            .replace("€", "€")      \
            .replace("´´", '"')      \
            .replace("´", "'")       \
            .replace("....", "…")    \
            .replace("...", "…")     \
            .replace(". . .", "…")
          l = self.applyLanguageOnLine(l)
          el.appendLine(l)
        nextCountReady = True
 
    if el != None and len(str(el)) > 0:
      self.elements.append(el)
 
    Console.v('Parsing complete: ' + str(len(self.elements)) + ' subtitles found!')
    Console.v(str(len(emptySub)) + ' subtitles were empty: ' + str(emptySub))
 
  def parseTime(self, time):
    r1  = time.split(":")
    h   = int(r1[0])
    m   = int(r1[1])
    r2  = r1[2].split(',')
    s   = int(r2[0])
    ms  = int(r2[1])
    return ((h * 60 + m) * 60 + s) * 1000 + ms
 
  def applyLanguageOnLine(self, line):
    return line
 
  def exclude(self, line):
    l = line.lower()
    for x in exclusion:
      if l.find(x) != -1:
        return True
    return False
 
class Srt2Ass:
 
  def __init__(self, srt, fregular, fsize, delete):
    ass = srt.replace('.srt', '.ass')
    subs = SubRipReader(srt)
    AdvancedSubStationAlphaWriter(ass, subs.elements, fregular, fsize)
    if delete:
      Console.l("Removing " + srt + "…")
      os.remove(srt)
 
if __name__ == "__main__":
 
  parser = argparse.ArgumentParser(description='Convert SubRip (srt) files to Advanced Sub Station Alpha (ass) files.')
  parser.add_argument('file', metavar='file', nargs='*', help='the SubRip (srt) file')
  parser.add_argument('--font-regular', metavar='fontr', nargs='?', help='Name of the font to use for regular text. Default is "Cronos Pro".', default="Cronos Pro")
  parser.add_argument('--font-size', metavar='fonts', nargs='?', help='Font\'s size for both regular and italic fonts. Default is 24.', default="24")
  parser.add_argument('--delete', '-d', action='store_true', help='delete the original SubRip (srt) file')
  parser.add_argument('--verbose', '-v', action='store_true', help='print information about the process')
  args = parser.parse_args()
 
  Console.verbose = args.verbose
 
  srtfiles = []
  if len(args.file) == 0:
    os.chdir(".")
    srtfiles = glob.glob("*.srt")
  elif len(args.file) == 1:
    os.chdir(".")
    srtfiles = glob.glob(args.file[0])
  else:
    srtfiles = args.file
 
  for srt in srtfiles:
    Srt2Ass(srt, args.font_regular, args.font_size, args.delete)