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# -*- coding: utf-8 -*-
# Copyright 2018 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, pathfmt, options):
PostProcessor.__init__(self)
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)
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("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 if libx264/5 is explicitly or implicitly used
self.prevent_odd = (
vcodec in ("libx264", "libx265") or
not vcodec and self.extension.lower() in ("mp4", "mkv"))
else:
self.prevent_odd = False
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 run(self, pathfmt):
if not self._frames:
return
rate_in, rate_out = self.calculate_framerate(self._frames)
with tempfile.TemporaryDirectory() as tempdir:
# extract frames
with zipfile.ZipFile(pathfmt.temppath) as zfile:
zfile.extractall(tempdir)
# write ffconcat file
ffconcat = tempdir + "/ffconcat.txt"
with open(ffconcat, "w") as file:
file.write("ffconcat version 1.0\n")
for frame in self._frames:
file.write("file '{}'\n".format(frame["file"]))
file.write("duration {}\n".format(frame["delay"] / 1000))
if self.extension != "gif":
# repeat the last frame to prevent it from only being
# displayed for a very short amount of time
file.write("file '{}'\n".format(self._frames[-1]["file"]))
# collect command-line arguments
args = [self.ffmpeg]
if rate_in:
args += ["-r", str(rate_in)]
args += ["-i", ffconcat]
if rate_out:
args += ["-r", str(rate_out)]
if self.prevent_odd:
args += ["-vf", "crop=iw-mod(iw\\,2):ih-mod(ih\\,2)"]
if self.args:
args += self.args
self.log.debug("ffmpeg args: %s", args)
# invoke ffmpeg
pathfmt.set_extension(self.extension)
if self.twopass:
if "-f" not in 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)
if self.delete:
pathfmt.delete = True
else:
pathfmt.set_extension("zip")
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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