mirror of
https://github.com/ytdl-org/youtube-dl.git
synced 2024-11-14 05:15:37 +00:00
197 lines
6.9 KiB
Python
197 lines
6.9 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
import os
|
|
import subprocess
|
|
import sys
|
|
import time
|
|
|
|
from utils import *
|
|
|
|
|
|
class PostProcessor(object):
|
|
"""Post Processor class.
|
|
|
|
PostProcessor objects can be added to downloaders with their
|
|
add_post_processor() method. When the downloader has finished a
|
|
successful download, it will take its internal chain of PostProcessors
|
|
and start calling the run() method on each one of them, first with
|
|
an initial argument and then with the returned value of the previous
|
|
PostProcessor.
|
|
|
|
The chain will be stopped if one of them ever returns None or the end
|
|
of the chain is reached.
|
|
|
|
PostProcessor objects follow a "mutual registration" process similar
|
|
to InfoExtractor objects.
|
|
"""
|
|
|
|
_downloader = None
|
|
|
|
def __init__(self, downloader=None):
|
|
self._downloader = downloader
|
|
|
|
def set_downloader(self, downloader):
|
|
"""Sets the downloader for this PP."""
|
|
self._downloader = downloader
|
|
|
|
def run(self, information):
|
|
"""Run the PostProcessor.
|
|
|
|
The "information" argument is a dictionary like the ones
|
|
composed by InfoExtractors. The only difference is that this
|
|
one has an extra field called "filepath" that points to the
|
|
downloaded file.
|
|
|
|
When this method returns None, the postprocessing chain is
|
|
stopped. However, this method may return an information
|
|
dictionary that will be passed to the next postprocessing
|
|
object in the chain. It can be the one it received after
|
|
changing some fields.
|
|
|
|
In addition, this method may raise a PostProcessingError
|
|
exception that will be taken into account by the downloader
|
|
it was called from.
|
|
"""
|
|
return information # by default, do nothing
|
|
|
|
class AudioConversionError(BaseException):
|
|
def __init__(self, message):
|
|
self.message = message
|
|
|
|
class FFmpegExtractAudioPP(PostProcessor):
|
|
def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, keepvideo=False):
|
|
PostProcessor.__init__(self, downloader)
|
|
if preferredcodec is None:
|
|
preferredcodec = 'best'
|
|
self._preferredcodec = preferredcodec
|
|
self._preferredquality = preferredquality
|
|
self._keepvideo = keepvideo
|
|
self._exes = self.detect_executables()
|
|
|
|
@staticmethod
|
|
def detect_executables():
|
|
available = {'avprobe' : False, 'avconv' : False, 'ffmpeg' : False, 'ffprobe' : False}
|
|
for path in os.environ["PATH"].split(os.pathsep):
|
|
for program in available.keys():
|
|
exe_file = os.path.join(path, program)
|
|
if os.path.isfile(exe_file) and os.access(exe_file, os.X_OK):
|
|
available[program] = exe_file
|
|
return available
|
|
|
|
def get_audio_codec(self, path):
|
|
if not self._exes['ffprobe'] and not self._exes['avprobe']: return None
|
|
try:
|
|
cmd = [self._exes['avprobe'] or self._exes['ffprobe'], '-show_streams', '--', encodeFilename(path)]
|
|
handle = subprocess.Popen(cmd, stderr=file(os.path.devnull, 'w'), stdout=subprocess.PIPE)
|
|
output = handle.communicate()[0]
|
|
if handle.wait() != 0:
|
|
return None
|
|
except (IOError, OSError):
|
|
return None
|
|
audio_codec = None
|
|
for line in output.split('\n'):
|
|
if line.startswith('codec_name='):
|
|
audio_codec = line.split('=')[1].strip()
|
|
elif line.strip() == 'codec_type=audio' and audio_codec is not None:
|
|
return audio_codec
|
|
return None
|
|
|
|
def run_ffmpeg(self, path, out_path, codec, more_opts):
|
|
if not self._exes['ffmpeg'] and not self._exes['avconv']:
|
|
raise AudioConversionError('ffmpeg or avconv not found. Please install one.')
|
|
if codec is None:
|
|
acodec_opts = []
|
|
else:
|
|
acodec_opts = ['-acodec', codec]
|
|
cmd = ([self._exes['avconv'] or self._exes['ffmpeg'], '-y', '-i', encodeFilename(path), '-vn']
|
|
+ acodec_opts + more_opts +
|
|
['--', encodeFilename(out_path)])
|
|
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
|
|
stdout,stderr = p.communicate()
|
|
if p.returncode != 0:
|
|
msg = stderr.strip().split('\n')[-1]
|
|
raise AudioConversionError(msg)
|
|
|
|
def run(self, information):
|
|
path = information['filepath']
|
|
|
|
filecodec = self.get_audio_codec(path)
|
|
if filecodec is None:
|
|
self._downloader.to_stderr(u'WARNING: unable to obtain file audio codec with ffprobe')
|
|
return None
|
|
|
|
more_opts = []
|
|
if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'):
|
|
if self._preferredcodec == 'm4a' and filecodec == 'aac':
|
|
# Lossless, but in another container
|
|
acodec = 'copy'
|
|
extension = self._preferredcodec
|
|
more_opts = [self._exes['avconv'] and '-bsf:a' or '-absf', 'aac_adtstoasc']
|
|
elif filecodec in ['aac', 'mp3', 'vorbis']:
|
|
# Lossless if possible
|
|
acodec = 'copy'
|
|
extension = filecodec
|
|
if filecodec == 'aac':
|
|
more_opts = ['-f', 'adts']
|
|
if filecodec == 'vorbis':
|
|
extension = 'ogg'
|
|
else:
|
|
# MP3 otherwise.
|
|
acodec = 'libmp3lame'
|
|
extension = 'mp3'
|
|
more_opts = []
|
|
if self._preferredquality is not None:
|
|
if int(self._preferredquality) < 10:
|
|
more_opts += [self._exes['avconv'] and '-q:a' or '-aq', self._preferredquality]
|
|
else:
|
|
more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality]
|
|
else:
|
|
# We convert the audio (lossy)
|
|
acodec = {'mp3': 'libmp3lame', 'aac': 'aac', 'm4a': 'aac', 'vorbis': 'libvorbis', 'wav': None}[self._preferredcodec]
|
|
extension = self._preferredcodec
|
|
more_opts = []
|
|
if self._preferredquality is not None:
|
|
if int(self._preferredquality) < 10:
|
|
more_opts += [self._exes['avconv'] and '-q:a' or '-aq', self._preferredquality]
|
|
else:
|
|
more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality]
|
|
if self._preferredcodec == 'aac':
|
|
more_opts += ['-f', 'adts']
|
|
if self._preferredcodec == 'm4a':
|
|
more_opts += [self._exes['avconv'] and '-bsf:a' or '-absf', 'aac_adtstoasc']
|
|
if self._preferredcodec == 'vorbis':
|
|
extension = 'ogg'
|
|
if self._preferredcodec == 'wav':
|
|
extension = 'wav'
|
|
more_opts += ['-f', 'wav']
|
|
|
|
prefix, sep, ext = path.rpartition(u'.') # not os.path.splitext, since the latter does not work on unicode in all setups
|
|
new_path = prefix + sep + extension
|
|
self._downloader.to_screen(u'[' + (self._exes['avconv'] and 'avconv' or 'ffmpeg') + '] Destination: ' + new_path)
|
|
try:
|
|
self.run_ffmpeg(path, new_path, acodec, more_opts)
|
|
except:
|
|
etype,e,tb = sys.exc_info()
|
|
if isinstance(e, AudioConversionError):
|
|
self._downloader.to_stderr(u'ERROR: audio conversion failed: ' + e.message)
|
|
else:
|
|
self._downloader.to_stderr(u'ERROR: error running ' + (self._exes['avconv'] and 'avconv' or 'ffmpeg'))
|
|
return None
|
|
|
|
# Try to update the date time for extracted audio file.
|
|
if information.get('filetime') is not None:
|
|
try:
|
|
os.utime(encodeFilename(new_path), (time.time(), information['filetime']))
|
|
except:
|
|
self._downloader.to_stderr(u'WARNING: Cannot update utime of audio file')
|
|
|
|
if not self._keepvideo:
|
|
try:
|
|
os.remove(encodeFilename(path))
|
|
except (IOError, OSError):
|
|
self._downloader.to_stderr(u'WARNING: Unable to remove downloaded video file')
|
|
return None
|
|
|
|
information['filepath'] = new_path
|
|
return information
|