from __future__ import unicode_literals, print_function import argparse import codecs import os import re import os.path as op import io from io import open import sys from textwrap import dedent from .formats import get_file_extension from .time import make_time from .ssafile import SSAFile from .common import PY3, VERSION def positive_float(s): x = float(s) if not x > 0: raise argparse.ArgumentTypeError("%r is not a positive number" % s) return x def character_encoding(s): try: codecs.lookup(s) return s except LookupError: raise argparse.ArgumentError def time(s): d = {} for v, k in re.findall(r"(\d*\.?\d*)(ms|m|s|h)", s): d[k] = float(v) return make_time(**d) def change_ext(path, ext): base, _ = op.splitext(path) return base + ext class Pysubs2CLI(object): def __init__(self): parser = self.parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter, prog="pysubs2", description=dedent(""" The pysubs2 CLI for processing subtitle files. https://github.com/tkarabela/pysubs2 """), epilog=dedent(""" usage examples: python -m pysubs2 --to srt *.ass python -m pysubs2 --to microdvd --fps 23.976 *.ass python -m pysubs2 --shift 0.3s *.srt python -m pysubs2 --shift 0.3s retimed_file.srt python -m pysubs2 --shift-back 0.3s --output-dir retimed *.srt python -m pysubs2 --transform-framerate 25 23.976 *.srt""")) parser.add_argument("files", nargs="*", metavar="FILE", help="Input subtitle files. Can be in SubStation Alpha (*.ass, *.ssa), SubRip (*.srt) or " "MicroDVD (*.sub) formats. When no files are specified, pysubs2 will work as a pipe, " "reading from standard input and writing to standard output.") parser.add_argument("-v", "--version", action="version", version="pysubs2 %s" % VERSION) parser.add_argument("-f", "--from", choices=["ass", "ssa", "srt", "microdvd", "json"], dest="input_format", help="By default, subtitle format is detected from the file. This option can be used to " "skip autodetection and force specific format. Generally, it should never be needed.") parser.add_argument("-t", "--to", choices=["ass", "ssa", "srt", "microdvd", "json"], dest="output_format", help="Convert subtitle files to given format. By default, each file is saved in its " "original format.") parser.add_argument("--input-enc", metavar="ENCODING", default="iso-8859-1", type=character_encoding, help="Character encoding for input files. By default, ISO-8859-1 is used for both " "input and output, which should generally work (for 8-bit encodings).") parser.add_argument("--output-enc", metavar="ENCODING", type=character_encoding, help="Character encoding for output files. By default, it is the same as input encoding. " "If you wish to convert between encodings, make sure --input-enc is set correctly! " "Otherwise, your output files will probably be corrupted. It's a good idea to " "back up your files or use the -o option.") parser.add_argument("--fps", metavar="FPS", type=positive_float, help="This argument specifies framerate for MicroDVD files. By default, framerate " "is detected from the file. Use this when framerate specification is missing " "or to force different framerate.") parser.add_argument("-o", "--output-dir", metavar="DIR", help="Use this to save all files to given directory. By default, every file is saved to its parent directory, " "ie. unless it's being saved in different subtitle format (and thus with different file extension), " "it overwrites the original file.") group = parser.add_mutually_exclusive_group() group.add_argument("--shift", metavar="TIME", type=time, help="Delay all subtitles by given time amount. Time is specified like this: '1m30s', '0.5s', ...") group.add_argument("--shift-back", metavar="TIME", type=time, help="The opposite of --shift (subtitles will appear sooner).") group.add_argument("--transform-framerate", nargs=2, metavar=("FPS1", "FPS2"), type=positive_float, help="Multiply all timestamps by FPS1/FPS2 ratio.") def __call__(self, argv): try: self.main(argv) except KeyboardInterrupt: exit("\nAborted by user.") def main(self, argv): args = self.parser.parse_args(argv) errors = 0 if args.output_dir and not op.exists(args.output_dir): os.makedirs(args.output_dir) if args.output_enc is None: args.output_enc = args.input_enc if args.files: for path in args.files: if not op.exists(path): print("Skipping", path, "(does not exist)") errors += 1 elif not op.isfile(path): print("Skipping", path, "(not a file)") errors += 1 else: with open(path, encoding=args.input_enc) as infile: subs = SSAFile.from_file(infile, args.input_format, args.fps) self.process(subs, args) if args.output_format is None: outpath = path output_format = subs.format else: ext = get_file_extension(args.output_format) outpath = change_ext(path, ext) output_format = args.output_format if args.output_dir is not None: _, filename = op.split(outpath) outpath = op.join(args.output_dir, filename) with open(outpath, "w", encoding=args.output_enc) as outfile: subs.to_file(outfile, output_format, args.fps) else: if PY3: infile = io.TextIOWrapper(sys.stdin.buffer, args.input_enc) outfile = io.TextIOWrapper(sys.stdout.buffer, args.output_enc) else: infile = io.TextIOWrapper(sys.stdin, args.input_enc) outfile = io.TextIOWrapper(sys.stdout, args.output_enc) subs = SSAFile.from_file(infile, args.input_format, args.fps) self.process(subs, args) output_format = args.output_format or subs.format subs.to_file(outfile, output_format, args.fps) return (0 if errors == 0 else 1) @staticmethod def process(subs, args): if args.shift is not None: subs.shift(ms=args.shift) elif args.shift_back is not None: subs.shift(ms=-args.shift_back) elif args.transform_framerate is not None: in_fps, out_fps = args.transform_framerate subs.transform_framerate(in_fps, out_fps)