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# -*- coding: utf-8 -*-
# Copyright 2018-2021 Mike Fährmann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
"""Convert Pixiv Ugoira to WebM"""
from .common import PostProcessor
from .. import util
import collections
import subprocess
import tempfile
import zipfile
import os
class UgoiraPP(PostProcessor):
def __init__(self, job, options):
PostProcessor.__init__(self, job)
self.extension = options.get("extension") or "webm"
self.args = options.get("ffmpeg-args") or ()
self.twopass = options.get("ffmpeg-twopass", False)
self.output = options.get("ffmpeg-output", True)
self.delete = not options.get("keep-files", False)
self.repeat = options.get("repeat-last-frame", True)
ffmpeg = options.get("ffmpeg-location")
self.ffmpeg = util.expand_path(ffmpeg) if ffmpeg else "ffmpeg"
rate = options.get("framerate", "auto")
if rate != "auto":
self.calculate_framerate = lambda _: (None, rate)
if options.get("ffmpeg-demuxer") == "image2":
self._process = self._image2
else:
self._process = self._concat
if options.get("libx264-prevent-odd", True):
# get last video-codec argument
vcodec = None
for index, arg in enumerate(self.args):
arg, _, stream = arg.partition(":")
if arg == "-vcodec" or arg in ("-c", "-codec") and (
not stream or stream.partition(":")[0] in ("v", "V")):
vcodec = self.args[index + 1]
# use filter when using libx264/5
self.prevent_odd = (
vcodec in ("libx264", "libx265") or
not vcodec and self.extension.lower() in ("mp4", "mkv"))
else:
self.prevent_odd = False
job.register_hooks(
{"prepare": self.prepare, "file": self.convert}, options)
def prepare(self, pathfmt):
self._frames = None
if pathfmt.extension != "zip":
return
if "frames" in pathfmt.kwdict:
self._frames = pathfmt.kwdict["frames"]
elif "pixiv_ugoira_frame_data" in pathfmt.kwdict:
self._frames = pathfmt.kwdict["pixiv_ugoira_frame_data"]["data"]
else:
return
if self.delete:
pathfmt.set_extension(self.extension)
def convert(self, pathfmt):
if not self._frames:
return
with tempfile.TemporaryDirectory() as tempdir:
# extract frames
try:
with zipfile.ZipFile(pathfmt.temppath) as zfile:
zfile.extractall(tempdir)
except FileNotFoundError:
pathfmt.realpath = pathfmt.temppath
return
# process frames and collect command-line arguments
args = self._process(tempdir)
if self.args:
args += self.args
self.log.debug("ffmpeg args: %s", args)
# invoke ffmpeg
pathfmt.set_extension(self.extension)
try:
if self.twopass:
if "-f" not in self.args:
args += ("-f", self.extension)
args += ("-passlogfile", tempdir + "/ffmpeg2pass", "-pass")
self._exec(args + ["1", "-y", os.devnull])
self._exec(args + ["2", pathfmt.realpath])
else:
args.append(pathfmt.realpath)
self._exec(args)
except OSError as exc:
print()
self.log.error("Unable to invoke FFmpeg (%s: %s)",
exc.__class__.__name__, exc)
pathfmt.realpath = pathfmt.temppath
else:
if self.delete:
pathfmt.delete = True
else:
pathfmt.set_extension("zip")
def _concat(self, path):
ffconcat = path + "/ffconcat.txt"
content = ["ffconcat version 1.0"]
append = content.append
for frame in self._frames:
append("file '{}'\nduration {}".format(
frame["file"], frame["delay"] / 1000))
if self.repeat:
append("file '{}'".format(frame["file"]))
append("")
with open(ffconcat, "w") as file:
file.write("\n".join(content))
rate_in, rate_out = self.calculate_framerate(self._frames)
args = [self.ffmpeg, "-f", "concat"]
if rate_in:
args += ("-r", str(rate_in))
args += ("-i", ffconcat)
if rate_out:
args += ("-r", str(rate_out))
return args
def _image2(self, path):
path += "/"
# adjust frame mtime values
ts = 0
for frame in self._frames:
os.utime(path + frame["file"], ns=(ts, ts))
ts += frame["delay"] * 1000000
return [
self.ffmpeg,
"-f", "image2",
"-ts_from_file", "2",
"-pattern_type", "sequence",
"-i", "{}%06d.{}".format(
path.replace("%", "%%"), frame["file"].rpartition(".")[2]),
]
def _exec(self, args):
out = None if self.output else subprocess.DEVNULL
return subprocess.Popen(args, stdout=out, stderr=out).wait()
@staticmethod
def calculate_framerate(framelist):
counter = collections.Counter(frame["delay"] for frame in framelist)
fps = "1000/{}".format(min(counter))
return (fps, None) if len(counter) == 1 else (None, fps)
__postprocessor__ = UgoiraPP
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