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318 lines
10 KiB
318 lines
10 KiB
# -*- coding: utf-8 -*-
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# Copyright 2018-2023 Mike Fährmann
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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"""Convert Pixiv Ugoira to WebM"""
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from .common import PostProcessor
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from .. import util
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import subprocess
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import tempfile
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import zipfile
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import shutil
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import os
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try:
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from math import gcd
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except ImportError:
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def gcd(a, b):
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while b:
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a, b = b, a % b
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return a
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class UgoiraPP(PostProcessor):
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def __init__(self, job, options):
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PostProcessor.__init__(self, job)
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self.extension = options.get("extension") or "webm"
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self.args = options.get("ffmpeg-args") or ()
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self.twopass = options.get("ffmpeg-twopass", False)
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self.output = options.get("ffmpeg-output", "error")
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self.delete = not options.get("keep-files", False)
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self.repeat = options.get("repeat-last-frame", True)
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self.mtime = options.get("mtime", True)
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self.uniform = False
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ffmpeg = options.get("ffmpeg-location")
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self.ffmpeg = util.expand_path(ffmpeg) if ffmpeg else "ffmpeg"
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mkvmerge = options.get("mkvmerge-location")
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self.mkvmerge = util.expand_path(mkvmerge) if mkvmerge else "mkvmerge"
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demuxer = options.get("ffmpeg-demuxer")
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if demuxer is None or demuxer == "auto":
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if self.extension in ("webm", "mkv") and (
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mkvmerge or shutil.which("mkvmerge")):
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demuxer = "mkvmerge"
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else:
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demuxer = "concat"
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if demuxer == "mkvmerge":
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self._process = self._process_mkvmerge
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self._finalize = self._finalize_mkvmerge
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elif demuxer == "image2":
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self._process = self._process_image2
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self._finalize = None
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else:
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self._process = self._process_concat
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self._finalize = None
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self.log.debug("using %s demuxer", demuxer)
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rate = options.get("framerate", "auto")
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if rate == "uniform":
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self.uniform = True
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elif rate != "auto":
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self.calculate_framerate = lambda _: (None, rate)
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if options.get("libx264-prevent-odd", True):
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# get last video-codec argument
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vcodec = None
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for index, arg in enumerate(self.args):
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arg, _, stream = arg.partition(":")
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if arg == "-vcodec" or arg in ("-c", "-codec") and (
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not stream or stream.partition(":")[0] in ("v", "V")):
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vcodec = self.args[index + 1]
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# use filter when using libx264/5
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self.prevent_odd = (
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vcodec in ("libx264", "libx265") or
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not vcodec and self.extension.lower() in ("mp4", "mkv"))
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else:
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self.prevent_odd = False
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self.args_pp = args = []
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if isinstance(self.output, str):
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args += ("-hide_banner", "-loglevel", self.output)
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if self.prevent_odd:
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args += ("-vf", "crop=iw-mod(iw\\,2):ih-mod(ih\\,2)")
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job.register_hooks(
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{"prepare": self.prepare, "file": self.convert}, options)
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def prepare(self, pathfmt):
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self._frames = None
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if pathfmt.extension != "zip":
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return
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kwdict = pathfmt.kwdict
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if "frames" in kwdict:
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self._frames = kwdict["frames"]
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elif "pixiv_ugoira_frame_data" in kwdict:
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self._frames = kwdict["pixiv_ugoira_frame_data"]["data"]
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else:
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return
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if self.delete:
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pathfmt.set_extension(self.extension)
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pathfmt.build_path()
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def convert(self, pathfmt):
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if not self._frames:
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return
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with tempfile.TemporaryDirectory() as tempdir:
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# extract frames
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try:
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with zipfile.ZipFile(pathfmt.temppath) as zfile:
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zfile.extractall(tempdir)
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except FileNotFoundError:
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pathfmt.realpath = pathfmt.temppath
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return
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# process frames and collect command-line arguments
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pathfmt.set_extension(self.extension)
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pathfmt.build_path()
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args = self._process(pathfmt, tempdir)
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if self.args_pp:
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args += self.args_pp
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if self.args:
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args += self.args
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# ensure target directory exists
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os.makedirs(pathfmt.realdirectory, exist_ok=True)
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# invoke ffmpeg
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try:
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if self.twopass:
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if "-f" not in self.args:
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args += ("-f", self.extension)
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args += ("-passlogfile", tempdir + "/ffmpeg2pass", "-pass")
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self._exec(args + ["1", "-y", os.devnull])
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self._exec(args + ["2", pathfmt.realpath])
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else:
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args.append(pathfmt.realpath)
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self._exec(args)
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if self._finalize:
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self._finalize(pathfmt, tempdir)
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except OSError as exc:
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print()
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self.log.error("Unable to invoke FFmpeg (%s: %s)",
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exc.__class__.__name__, exc)
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pathfmt.realpath = pathfmt.temppath
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except Exception as exc:
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print()
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self.log.error("%s: %s", exc.__class__.__name__, exc)
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self.log.debug("", exc_info=True)
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pathfmt.realpath = pathfmt.temppath
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else:
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if self.mtime:
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mtime = pathfmt.kwdict.get("_mtime")
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if mtime:
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util.set_mtime(pathfmt.realpath, mtime)
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if self.delete:
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pathfmt.delete = True
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else:
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pathfmt.set_extension("zip")
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pathfmt.build_path()
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def _exec(self, args):
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self.log.debug(args)
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out = None if self.output else subprocess.DEVNULL
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retcode = util.Popen(args, stdout=out, stderr=out).wait()
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if retcode:
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print()
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self.log.error("Non-zero exit status when running %s (%s)",
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args, retcode)
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raise ValueError()
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return retcode
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def _process_concat(self, pathfmt, tempdir):
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rate_in, rate_out = self.calculate_framerate(self._frames)
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args = [self.ffmpeg, "-f", "concat"]
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if rate_in:
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args += ("-r", str(rate_in))
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args += ("-i", self._write_ffmpeg_concat(tempdir))
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if rate_out:
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args += ("-r", str(rate_out))
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return args
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def _process_image2(self, pathfmt, tempdir):
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tempdir += "/"
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frames = self._frames
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# add extra frame if necessary
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if self.repeat and not self._delay_is_uniform(frames):
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last = frames[-1]
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delay_gcd = self._delay_gcd(frames)
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if last["delay"] - delay_gcd > 0:
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last["delay"] -= delay_gcd
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self.log.debug("non-uniform delays; inserting extra frame")
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last_copy = last.copy()
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frames.append(last_copy)
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name, _, ext = last_copy["file"].rpartition(".")
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last_copy["file"] = "{:>06}.{}".format(int(name)+1, ext)
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shutil.copyfile(tempdir + last["file"],
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tempdir + last_copy["file"])
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# adjust frame mtime values
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ts = 0
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for frame in frames:
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os.utime(tempdir + frame["file"], ns=(ts, ts))
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ts += frame["delay"] * 1000000
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return [
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self.ffmpeg,
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"-f", "image2",
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"-ts_from_file", "2",
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"-pattern_type", "sequence",
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"-i", "{}%06d.{}".format(
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tempdir.replace("%", "%%"),
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frame["file"].rpartition(".")[2]
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),
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]
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def _process_mkvmerge(self, pathfmt, tempdir):
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self._realpath = pathfmt.realpath
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pathfmt.realpath = tempdir + "/temp." + self.extension
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return [
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self.ffmpeg,
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"-f", "image2",
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"-pattern_type", "sequence",
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"-i", "{}/%06d.{}".format(
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tempdir.replace("%", "%%"),
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self._frames[0]["file"].rpartition(".")[2]
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),
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]
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def _finalize_mkvmerge(self, pathfmt, tempdir):
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args = [
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self.mkvmerge,
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"-o", pathfmt.path, # mkvmerge does not support "raw" paths
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"--timecodes", "0:" + self._write_mkvmerge_timecodes(tempdir),
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]
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if self.extension == "webm":
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args.append("--webm")
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args += ("=", pathfmt.realpath)
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pathfmt.realpath = self._realpath
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self._exec(args)
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def _write_ffmpeg_concat(self, tempdir):
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content = ["ffconcat version 1.0"]
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append = content.append
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for frame in self._frames:
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append("file '{}'\nduration {}".format(
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frame["file"], frame["delay"] / 1000))
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if self.repeat:
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append("file '{}'".format(frame["file"]))
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append("")
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ffconcat = tempdir + "/ffconcat.txt"
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with open(ffconcat, "w") as fp:
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fp.write("\n".join(content))
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return ffconcat
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def _write_mkvmerge_timecodes(self, tempdir):
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content = ["# timecode format v2"]
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append = content.append
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delay_sum = 0
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for frame in self._frames:
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append(str(delay_sum))
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delay_sum += frame["delay"]
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append(str(delay_sum))
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append("")
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timecodes = tempdir + "/timecodes.tc"
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with open(timecodes, "w") as fp:
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fp.write("\n".join(content))
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return timecodes
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def calculate_framerate(self, frames):
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if self._delay_is_uniform(frames):
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return ("1000/{}".format(frames[0]["delay"]), None)
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if not self.uniform:
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gcd = self._delay_gcd(frames)
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if gcd >= 10:
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return (None, "1000/{}".format(gcd))
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return (None, None)
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@staticmethod
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def _delay_gcd(frames):
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result = frames[0]["delay"]
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for f in frames:
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result = gcd(result, f["delay"])
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return result
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@staticmethod
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def _delay_is_uniform(frames):
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delay = frames[0]["delay"]
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for f in frames:
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if f["delay"] != delay:
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return False
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return True
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__postprocessor__ = UgoiraPP
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