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213 lines
10 KiB
213 lines
10 KiB
import argparse
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import codecs
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import os
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import re
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import os.path as op
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import io
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from io import open
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import sys
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from textwrap import dedent
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from .formats import get_file_extension, FORMAT_IDENTIFIERS
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from .time import make_time
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from .ssafile import SSAFile
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from .common import VERSION
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import logging
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def positive_float(s: str) -> float:
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x = float(s)
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if not x > 0:
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raise argparse.ArgumentTypeError(f"{s!r} is not a positive number")
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return x
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def character_encoding(s: str) -> str:
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try:
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codecs.lookup(s)
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return s
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except LookupError:
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raise argparse.ArgumentError(None, f"unknown character encoding: {s}")
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def time(s: str) -> int:
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d = {}
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for v, k in re.findall(r"(\d*\.?\d*)(ms|m|s|h)", s):
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d[k] = float(v)
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return make_time(**d) # type: ignore # Argument 1 has incomp. type "**Dict[Any, float]"; expected "Optional[int]"
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def change_ext(path: str, ext: str) -> str:
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base, _ = op.splitext(path)
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return base + ext
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class Pysubs2CLI:
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def __init__(self):
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parser = self.parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter,
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prog="pysubs2",
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description=dedent("""
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The pysubs2 CLI for processing subtitle files.
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https://github.com/tkarabela/pysubs2
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"""),
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epilog=dedent("""
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usage examples:
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python -m pysubs2 --to srt *.ass
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python -m pysubs2 --to srt --clean *.ass
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python -m pysubs2 --to microdvd --fps 23.976 *.ass
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python -m pysubs2 --shift 0.3s *.srt
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python -m pysubs2 --shift 0.3s <my_file.srt >retimed_file.srt
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python -m pysubs2 --shift-back 0.3s --output-dir retimed *.srt
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python -m pysubs2 --transform-framerate 25 23.976 *.srt"""))
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parser.add_argument("files", nargs="*", metavar="FILE",
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help="Input subtitle files. Can be in SubStation Alpha (*.ass, *.ssa), SubRip (*.srt), "
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"MicroDVD (*.sub) or other supported format. When no files are specified, "
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"pysubs2 will work as a pipe, reading from standard input and writing to standard output.")
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parser.add_argument("-v", "--version", action="version", version=f"pysubs2 {VERSION}")
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parser.add_argument("-f", "--from", choices=FORMAT_IDENTIFIERS, dest="input_format",
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help="By default, subtitle format is detected from the file. This option can be used to "
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"skip autodetection and force specific format. Generally, it should never be needed.")
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parser.add_argument("-t", "--to", choices=FORMAT_IDENTIFIERS, dest="output_format",
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help="Convert subtitle files to given format. By default, each file is saved in its "
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"original format.")
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parser.add_argument("--input-enc", metavar="ENCODING", default="utf-8", type=character_encoding,
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help="Character encoding for input files. By default, UTF-8 is used for both "
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"input and output.")
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parser.add_argument("--output-enc", metavar="ENCODING", type=character_encoding,
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help="Character encoding for output files. By default, it is the same as input encoding. "
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"If you wish to convert between encodings, make sure --input-enc is set correctly! "
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"Otherwise, your output files will probably be corrupted. It's a good idea to "
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"back up your files or use the -o option.")
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parser.add_argument("--fps", metavar="FPS", type=positive_float,
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help="This argument specifies framerate for MicroDVD files. By default, framerate "
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"is detected from the file. Use this when framerate specification is missing "
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"or to force different framerate.")
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parser.add_argument("-o", "--output-dir", metavar="DIR",
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help="Use this to save all files to given directory. By default, every file is saved to its parent directory, "
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"ie. unless it's being saved in different subtitle format (and thus with different file extension), "
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"it overwrites the original file.")
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parser.add_argument("--clean", action="store_true",
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help="Attempt to remove non-essential subtitles (eg. karaoke, SSA drawing tags), "
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"strip styling information when saving to non-SSA formats")
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parser.add_argument("--verbose", action="store_true",
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help="Print misc logging")
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group = parser.add_mutually_exclusive_group()
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group.add_argument("--shift", metavar="TIME", type=time,
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help="Delay all subtitles by given time amount. Time is specified like this: '1m30s', '0.5s', ...")
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group.add_argument("--shift-back", metavar="TIME", type=time,
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help="The opposite of --shift (subtitles will appear sooner).")
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group.add_argument("--transform-framerate", nargs=2, metavar=("FPS1", "FPS2"), type=positive_float,
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help="Multiply all timestamps by FPS1/FPS2 ratio.")
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extra_srt_options = parser.add_argument_group("optional arguments (SRT)")
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extra_srt_options.add_argument("--srt-keep-unknown-html-tags", action="store_true",
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help="(input) do not strip unrecognized HTML tags")
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extra_srt_options.add_argument("--srt-keep-html-tags", action="store_true",
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help="(input) do not convert HTML tags to SubStation internally,"
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" this implies --srt-keep-unknown-html-tags")
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extra_srt_options.add_argument("--srt-keep-ssa-tags", action="store_true",
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help="(output) do not convert/strip SubStation tags for output")
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extra_sub_options = parser.add_argument_group("optional arguments (MicroDVD)")
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extra_sub_options.add_argument("--sub-no-write-fps-declaration", action="store_true",
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help="(output) omit writing FPS as first zero-length subtitle")
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def __call__(self, argv):
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try:
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self.main(argv)
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except KeyboardInterrupt:
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exit("\nAborted by user.")
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def main(self, argv):
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args = self.parser.parse_args(argv)
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errors = 0
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if args.verbose:
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logging.basicConfig(level=logging.DEBUG)
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if args.output_dir and not op.exists(args.output_dir):
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os.makedirs(args.output_dir)
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if args.output_enc is None:
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args.output_enc = args.input_enc
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extra_input_args = {}
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extra_output_args = {}
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if args.srt_keep_unknown_html_tags:
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extra_input_args["keep_unknown_html_tags"] = True
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if args.srt_keep_html_tags:
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extra_input_args["keep_html_tags"] = True
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if args.srt_keep_ssa_tags:
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extra_output_args["keep_ssa_tags"] = True
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if args.sub_no_write_fps_declaration:
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extra_output_args["write_fps_declaration"] = False
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logging.debug("Extra arguments to SSAFile.from_file(): %r", extra_input_args)
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logging.debug("Extra arguments to SSAFile.to_file(): %r", extra_output_args)
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if args.files:
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for path in args.files:
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if not op.exists(path):
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print("Skipping", path, "(does not exist)")
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errors += 1
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elif not op.isfile(path):
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print("Skipping", path, "(not a file)")
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errors += 1
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else:
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with open(path, encoding=args.input_enc) as infile:
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subs = SSAFile.from_file(infile, args.input_format, args.fps, **extra_input_args)
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self.process(subs, args)
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if args.output_format is None:
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outpath = path
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output_format = subs.format
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else:
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ext = get_file_extension(args.output_format)
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outpath = change_ext(path, ext)
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output_format = args.output_format
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if args.output_dir is not None:
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_, filename = op.split(outpath)
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outpath = op.join(args.output_dir, filename)
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with open(outpath, "w", encoding=args.output_enc) as outfile:
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subs.to_file(outfile, output_format, args.fps, apply_styles=not args.clean,
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**extra_output_args)
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else:
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infile = io.TextIOWrapper(sys.stdin.buffer, args.input_enc)
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outfile = io.TextIOWrapper(sys.stdout.buffer, args.output_enc)
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subs = SSAFile.from_file(infile, args.input_format, args.fps)
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self.process(subs, args)
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output_format = args.output_format or subs.format
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subs.to_file(outfile, output_format, args.fps, apply_styles=not args.clean)
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return (0 if errors == 0 else 1)
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@staticmethod
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def process(subs, args):
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if args.shift is not None:
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subs.shift(ms=args.shift)
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elif args.shift_back is not None:
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subs.shift(ms=-args.shift_back)
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elif args.transform_framerate is not None:
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in_fps, out_fps = args.transform_framerate
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subs.transform_framerate(in_fps, out_fps)
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if args.clean:
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subs.remove_miscellaneous_events()
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def __main__():
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cli = Pysubs2CLI()
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rv = cli(sys.argv[1:])
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sys.exit(rv)
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if __name__ == "__main__":
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__main__()
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