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youtube_download.py
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# coding=utf-8
import yt_dlp
import os
from moviepy import VideoFileClip, vfx
import uuid
import logging
base_dir = os.path.abspath(os.path.dirname(__file__))
DEFAULT_COOKIE_TXT_PATH = os.path.join(base_dir, "cookies.txt")
NO_DL_OPTS = {
"skip_download": True,
"quiet": False,
"no_warnings": True,
"ignoreerrors": True,
"nocheckcertificate": True,
"restrictfilenames": True,
"noplaylist": True,
"logtostderr": False,
"default_search": "auto",
"usenetrc": False,
"fixup": "detect_or_warn",
"cookiefile": DEFAULT_COOKIE_TXT_PATH
# "username": "oauth2",
# "password": "",
}
class Video:
def __init__(self, url: str, cookie_file_path: str = DEFAULT_COOKIE_TXT_PATH):
self.url = url
self.full_info = self.get_full_info(url)
self.cookie_file_path = (
cookie_file_path if cookie_file_path else DEFAULT_COOKIE_TXT_PATH
)
def download(self, file_path: str):
dl_opts = {
"format": "bestaudio/best",
"outtmpl": file_path,
"restrictfilenames": True,
"noplaylist": True,
"nocheckcertificate": True,
"logtostderr": False,
"default_search": "auto",
"usenetrc": False,
"fixup": "detect_or_warn",
"cookiefile": self.cookie_file_path,
}
with yt_dlp.YoutubeDL(dl_opts) as ydl:
return ydl.download([self.url])
def download_section(self, file_path: str, start_time: int, end_time: int):
dl_opts = {
"format": "bestaudio/best",
"outtmpl": file_path,
"restrictfilenames": True,
"noplaylist": True,
"nocheckcertificate": True,
"logtostderr": False,
"default_search": "auto",
"usenetrc": False,
"fixup": "detect_or_warn",
"external_downloader": "ffmpeg",
"external_downloader_args": {
"ffmpeg_i": ["-ss", str(start_time), "-to", str(end_time)],
},
"cookiefile": self.cookie_file_path,
# "username": "oauth2",
# "password": "",
}
with yt_dlp.YoutubeDL(dl_opts) as ydl:
return ydl.download([self.url])
def download_section_in_mp4(
self,
file_path: str,
start_time: int,
end_time: int,
use_legacy: bool = False,
keep_cache: bool = False,
):
if not use_legacy:
dl_opts = {
"merge_output_format": "mp4",
"final_ext": "mp4",
"format": "bestaudio+bestvideo/best",
"outtmpl": file_path,
"restrictfilenames": True,
"noplaylist": True,
"nocheckcertificate": True,
"logtostderr": False,
"default_search": "auto",
"usenetrc": False,
"fixup": "detect_or_warn",
"external_downloader": "ffmpeg",
"external_downloader_args": {
"ffmpeg_i": ["-ss", str(start_time), "-to", str(end_time)],
},
"cookiefile": self.cookie_file_path,
# "username": "oauth2",
# "password": "",
}
with yt_dlp.YoutubeDL(dl_opts) as ydl:
return ydl.download([self.url])
else:
cached_file_name = "cache_" + self.get_id() + ".mp4"
if not os.path.exists(cached_file_name):
self.download_in_mp4(cached_file_name)
v_obj = VideoEditor(cached_file_name, use_ffmpeg=True)
v_obj.clip(start_time, end_time)
v_obj.save_video(file_path)
if not keep_cache:
os.remove(cached_file_name)
def download_in_mp4(self, file_path: str):
dl_opts = {
"merge_output_format": "mp4",
"final_ext": "mp4",
"format": "bestaudio+bestvideo/best",
"outtmpl": file_path,
"restrictfilenames": True,
"noplaylist": True,
"nocheckcertificate": True,
"logtostderr": False,
"default_search": "auto",
"usenetrc": False,
"fixup": "detect_or_warn",
"cookiefile": self.cookie_file_path,
# "username": "oauth2",
# "password": "",
}
with yt_dlp.YoutubeDL(dl_opts) as ydl:
return ydl.download([self.url])
def get_id(self):
info_dict = self.full_info
vid = info_dict["id"]
return vid
def get_length(self):
info_dict = self.full_info
duration = info_dict["duration"]
return duration
def get_thumbnail(self):
info_dict = self.full_info
thumbnail = info_dict["thumbnail"]
return thumbnail
def get_title(self):
info_dict = self.full_info
title = info_dict["title"]
return title
def get_uploader(self):
info_dict = self.full_info
uploader = info_dict["uploader"]
return uploader
def get_extractor(self):
info_dict = self.full_info
extractor = info_dict["extractor"]
return extractor
def is_live(self) -> bool:
info_dict = self.full_info
if info_dict.get("is_live", None) is None:
return False
return info_dict["is_live"]
@staticmethod
def get_full_info(url) -> dict:
with yt_dlp.YoutubeDL(NO_DL_OPTS) as ydl:
info_dict = ydl.extract_info(url, download=False)
if info_dict is None:
raise RuntimeError(
"`get_full_info` failed. Are you blocked by YouTube?"
)
return info_dict
class VideoEditor:
def __init__(self, file_path: str, use_ffmpeg: bool = False):
self.clip_duration = None
self.file_path = file_path
if not use_ffmpeg:
self.clip_obj = VideoFileClip(file_path)
self.use_ffmpeg = use_ffmpeg
self.ffmpeg_cmds: list[str] = []
self.clip_duration: float
def __get_duration(self) -> float:
if self.clip_duration:
return self.clip_duration
return float(os.popen(f"ffprobe -i {self.file_path} -show_entries format=duration -v quiet -of csv=\"p=0\"").read())
def clip(self, start_time: float, end_time: float):
if self.use_ffmpeg:
self.ffmpeg_cmds.append(f"ffmpeg -y -i %INPUT -ss {start_time} -c copy -to {end_time} %OUTPUT")
else:
self.clip_obj = self.clip_obj.subclipped(start_time, end_time)
self.clip_duration = end_time - start_time
def fade(self, seconds: float, fade_in: bool = True, fade_out: bool = True):
if self.use_ffmpeg:
duration = self.__get_duration()
self.ffmpeg_cmds.append(
"ffmpeg -y -i %INPUT "
f"-vf fade=type=out:st={duration - seconds}:d={seconds} "
f"-af afade=type=out:st={duration - seconds}:d={seconds} "
f"-c:v libsvtav1 -c:a libopus -vbr:a off -b:a 140k %OUTPUT"
)
self.ffmpeg_cmds.append(
"ffmpeg -y -i %INPUT "
f"-vf fade=type=in:st=1:d={seconds} "
f"-af afade=type=in:st=1:d={seconds} "
f"-c:v libsvtav1 -c:a libopus -vbr:a off -b:a 140k %OUTPUT"
)
else:
if fade_in:
self.clip_obj = self.clip_obj.with_effects([vfx.FadeIn(seconds)])
if fade_out:
self.clip_obj = self.clip_obj.with_effects([vfx.FadeOut(seconds)])
def save_video(self, destination_file_path: str = None):
if destination_file_path is None:
destination_file_path = self.file_path
random_file_name = str(uuid.uuid4()).split("-")[-1] + ".mp4"
if not self.use_ffmpeg:
self.clip_obj.write_videofile(random_file_name)
self.clip_obj.close()
else:
input_file_path = self.file_path
another_random_file_name = destination_file_path
semi_products = []
for cmd in self.ffmpeg_cmds:
logging.debug("Running: " + cmd)
os.system(cmd.replace("%INPUT", input_file_path).replace("%OUTPUT", random_file_name))
another_random_file_name = str(uuid.uuid4()).split("-")[-1] + ".mp4"
os.replace(random_file_name, another_random_file_name)
input_file_path = another_random_file_name
semi_products.append(another_random_file_name)
random_file_name = another_random_file_name
semi_products.remove(random_file_name)
for f in semi_products:
os.remove(f)
os.replace(random_file_name, destination_file_path)
if __name__ == "__main__":
# v = Video(url=input("請貼上要下載的連結："))
# v.download_in_mp4("test.mp4")
editor = VideoEditor("test.mp4", use_ffmpeg=True)
editor.clip(10, 45)
editor.fade(0.5)
editor.save_video("test_out.mp4")