mirror of
https://codeberg.org/polarisfm/youtube-dl
synced 2024-11-27 02:44:33 +01:00
31bb8d3f51
It uses a helper method in the InfoExtractor class. The downloader will pick the requested formats using the bitrate in the info dict.
323 lines
10 KiB
Python
323 lines
10 KiB
Python
from __future__ import unicode_literals
|
|
|
|
import base64
|
|
import io
|
|
import itertools
|
|
import os
|
|
import time
|
|
import xml.etree.ElementTree as etree
|
|
|
|
from .common import FileDownloader
|
|
from .http import HttpFD
|
|
from ..utils import (
|
|
struct_pack,
|
|
struct_unpack,
|
|
compat_urlparse,
|
|
format_bytes,
|
|
encodeFilename,
|
|
sanitize_open,
|
|
)
|
|
|
|
|
|
class FlvReader(io.BytesIO):
|
|
"""
|
|
Reader for Flv files
|
|
The file format is documented in https://www.adobe.com/devnet/f4v.html
|
|
"""
|
|
|
|
# Utility functions for reading numbers and strings
|
|
def read_unsigned_long_long(self):
|
|
return struct_unpack('!Q', self.read(8))[0]
|
|
|
|
def read_unsigned_int(self):
|
|
return struct_unpack('!I', self.read(4))[0]
|
|
|
|
def read_unsigned_char(self):
|
|
return struct_unpack('!B', self.read(1))[0]
|
|
|
|
def read_string(self):
|
|
res = b''
|
|
while True:
|
|
char = self.read(1)
|
|
if char == b'\x00':
|
|
break
|
|
res += char
|
|
return res
|
|
|
|
def read_box_info(self):
|
|
"""
|
|
Read a box and return the info as a tuple: (box_size, box_type, box_data)
|
|
"""
|
|
real_size = size = self.read_unsigned_int()
|
|
box_type = self.read(4)
|
|
header_end = 8
|
|
if size == 1:
|
|
real_size = self.read_unsigned_long_long()
|
|
header_end = 16
|
|
return real_size, box_type, self.read(real_size-header_end)
|
|
|
|
def read_asrt(self):
|
|
# version
|
|
self.read_unsigned_char()
|
|
# flags
|
|
self.read(3)
|
|
quality_entry_count = self.read_unsigned_char()
|
|
# QualityEntryCount
|
|
for i in range(quality_entry_count):
|
|
self.read_string()
|
|
|
|
segment_run_count = self.read_unsigned_int()
|
|
segments = []
|
|
for i in range(segment_run_count):
|
|
first_segment = self.read_unsigned_int()
|
|
fragments_per_segment = self.read_unsigned_int()
|
|
segments.append((first_segment, fragments_per_segment))
|
|
|
|
return {
|
|
'segment_run': segments,
|
|
}
|
|
|
|
def read_afrt(self):
|
|
# version
|
|
self.read_unsigned_char()
|
|
# flags
|
|
self.read(3)
|
|
# time scale
|
|
self.read_unsigned_int()
|
|
|
|
quality_entry_count = self.read_unsigned_char()
|
|
# QualitySegmentUrlModifiers
|
|
for i in range(quality_entry_count):
|
|
self.read_string()
|
|
|
|
fragments_count = self.read_unsigned_int()
|
|
fragments = []
|
|
for i in range(fragments_count):
|
|
first = self.read_unsigned_int()
|
|
first_ts = self.read_unsigned_long_long()
|
|
duration = self.read_unsigned_int()
|
|
if duration == 0:
|
|
discontinuity_indicator = self.read_unsigned_char()
|
|
else:
|
|
discontinuity_indicator = None
|
|
fragments.append({
|
|
'first': first,
|
|
'ts': first_ts,
|
|
'duration': duration,
|
|
'discontinuity_indicator': discontinuity_indicator,
|
|
})
|
|
|
|
return {
|
|
'fragments': fragments,
|
|
}
|
|
|
|
def read_abst(self):
|
|
# version
|
|
self.read_unsigned_char()
|
|
# flags
|
|
self.read(3)
|
|
|
|
self.read_unsigned_int() # BootstrapinfoVersion
|
|
# Profile,Live,Update,Reserved
|
|
self.read(1)
|
|
# time scale
|
|
self.read_unsigned_int()
|
|
# CurrentMediaTime
|
|
self.read_unsigned_long_long()
|
|
# SmpteTimeCodeOffset
|
|
self.read_unsigned_long_long()
|
|
|
|
self.read_string() # MovieIdentifier
|
|
server_count = self.read_unsigned_char()
|
|
# ServerEntryTable
|
|
for i in range(server_count):
|
|
self.read_string()
|
|
quality_count = self.read_unsigned_char()
|
|
# QualityEntryTable
|
|
for i in range(quality_count):
|
|
self.read_string()
|
|
# DrmData
|
|
self.read_string()
|
|
# MetaData
|
|
self.read_string()
|
|
|
|
segments_count = self.read_unsigned_char()
|
|
segments = []
|
|
for i in range(segments_count):
|
|
box_size, box_type, box_data = self.read_box_info()
|
|
assert box_type == b'asrt'
|
|
segment = FlvReader(box_data).read_asrt()
|
|
segments.append(segment)
|
|
fragments_run_count = self.read_unsigned_char()
|
|
fragments = []
|
|
for i in range(fragments_run_count):
|
|
box_size, box_type, box_data = self.read_box_info()
|
|
assert box_type == b'afrt'
|
|
fragments.append(FlvReader(box_data).read_afrt())
|
|
|
|
return {
|
|
'segments': segments,
|
|
'fragments': fragments,
|
|
}
|
|
|
|
def read_bootstrap_info(self):
|
|
total_size, box_type, box_data = self.read_box_info()
|
|
assert box_type == b'abst'
|
|
return FlvReader(box_data).read_abst()
|
|
|
|
|
|
def read_bootstrap_info(bootstrap_bytes):
|
|
return FlvReader(bootstrap_bytes).read_bootstrap_info()
|
|
|
|
|
|
def build_fragments_list(boot_info):
|
|
""" Return a list of (segment, fragment) for each fragment in the video """
|
|
res = []
|
|
segment_run_table = boot_info['segments'][0]
|
|
# I've only found videos with one segment
|
|
segment_run_entry = segment_run_table['segment_run'][0]
|
|
n_frags = segment_run_entry[1]
|
|
fragment_run_entry_table = boot_info['fragments'][0]['fragments']
|
|
first_frag_number = fragment_run_entry_table[0]['first']
|
|
for (i, frag_number) in zip(range(1, n_frags+1), itertools.count(first_frag_number)):
|
|
res.append((1, frag_number))
|
|
return res
|
|
|
|
|
|
def write_flv_header(stream, metadata):
|
|
"""Writes the FLV header and the metadata to stream"""
|
|
# FLV header
|
|
stream.write(b'FLV\x01')
|
|
stream.write(b'\x05')
|
|
stream.write(b'\x00\x00\x00\x09')
|
|
# FLV File body
|
|
stream.write(b'\x00\x00\x00\x00')
|
|
# FLVTAG
|
|
# Script data
|
|
stream.write(b'\x12')
|
|
# Size of the metadata with 3 bytes
|
|
stream.write(struct_pack('!L', len(metadata))[1:])
|
|
stream.write(b'\x00\x00\x00\x00\x00\x00\x00')
|
|
stream.write(metadata)
|
|
# Magic numbers extracted from the output files produced by AdobeHDS.php
|
|
#(https://github.com/K-S-V/Scripts)
|
|
stream.write(b'\x00\x00\x01\x73')
|
|
|
|
|
|
def _add_ns(prop):
|
|
return '{http://ns.adobe.com/f4m/1.0}%s' % prop
|
|
|
|
|
|
class HttpQuietDownloader(HttpFD):
|
|
def to_screen(self, *args, **kargs):
|
|
pass
|
|
|
|
|
|
class F4mFD(FileDownloader):
|
|
"""
|
|
A downloader for f4m manifests or AdobeHDS.
|
|
"""
|
|
|
|
def real_download(self, filename, info_dict):
|
|
man_url = info_dict['url']
|
|
requested_bitrate = info_dict.get('tbr')
|
|
self.to_screen('[download] Downloading f4m manifest')
|
|
manifest = self.ydl.urlopen(man_url).read()
|
|
self.report_destination(filename)
|
|
http_dl = HttpQuietDownloader(self.ydl,
|
|
{
|
|
'continuedl': True,
|
|
'quiet': True,
|
|
'noprogress': True,
|
|
'test': self.params.get('test', False),
|
|
})
|
|
|
|
doc = etree.fromstring(manifest)
|
|
formats = [(int(f.attrib.get('bitrate', -1)), f) for f in doc.findall(_add_ns('media'))]
|
|
if requested_bitrate is None:
|
|
# get the best format
|
|
formats = sorted(formats, key=lambda f: f[0])
|
|
rate, media = formats[-1]
|
|
else:
|
|
rate, media = list(filter(
|
|
lambda f: int(f[0]) == requested_bitrate, formats))[0]
|
|
|
|
base_url = compat_urlparse.urljoin(man_url, media.attrib['url'])
|
|
bootstrap = base64.b64decode(doc.find(_add_ns('bootstrapInfo')).text)
|
|
metadata = base64.b64decode(media.find(_add_ns('metadata')).text)
|
|
boot_info = read_bootstrap_info(bootstrap)
|
|
fragments_list = build_fragments_list(boot_info)
|
|
if self.params.get('test', False):
|
|
# We only download the first fragment
|
|
fragments_list = fragments_list[:1]
|
|
total_frags = len(fragments_list)
|
|
|
|
tmpfilename = self.temp_name(filename)
|
|
(dest_stream, tmpfilename) = sanitize_open(tmpfilename, 'wb')
|
|
write_flv_header(dest_stream, metadata)
|
|
|
|
# This dict stores the download progress, it's updated by the progress
|
|
# hook
|
|
state = {
|
|
'downloaded_bytes': 0,
|
|
'frag_counter': 0,
|
|
}
|
|
start = time.time()
|
|
|
|
def frag_progress_hook(status):
|
|
frag_total_bytes = status.get('total_bytes', 0)
|
|
estimated_size = (state['downloaded_bytes'] +
|
|
(total_frags - state['frag_counter']) * frag_total_bytes)
|
|
if status['status'] == 'finished':
|
|
state['downloaded_bytes'] += frag_total_bytes
|
|
state['frag_counter'] += 1
|
|
progress = self.calc_percent(state['frag_counter'], total_frags)
|
|
byte_counter = state['downloaded_bytes']
|
|
else:
|
|
frag_downloaded_bytes = status['downloaded_bytes']
|
|
byte_counter = state['downloaded_bytes'] + frag_downloaded_bytes
|
|
frag_progress = self.calc_percent(frag_downloaded_bytes,
|
|
frag_total_bytes)
|
|
progress = self.calc_percent(state['frag_counter'], total_frags)
|
|
progress += frag_progress / float(total_frags)
|
|
|
|
eta = self.calc_eta(start, time.time(), estimated_size, byte_counter)
|
|
self.report_progress(progress, format_bytes(estimated_size),
|
|
status.get('speed'), eta)
|
|
http_dl.add_progress_hook(frag_progress_hook)
|
|
|
|
frags_filenames = []
|
|
for (seg_i, frag_i) in fragments_list:
|
|
name = 'Seg%d-Frag%d' % (seg_i, frag_i)
|
|
url = base_url + name
|
|
frag_filename = '%s-%s' % (tmpfilename, name)
|
|
success = http_dl.download(frag_filename, {'url': url})
|
|
if not success:
|
|
return False
|
|
with open(frag_filename, 'rb') as down:
|
|
down_data = down.read()
|
|
reader = FlvReader(down_data)
|
|
while True:
|
|
_, box_type, box_data = reader.read_box_info()
|
|
if box_type == b'mdat':
|
|
dest_stream.write(box_data)
|
|
break
|
|
frags_filenames.append(frag_filename)
|
|
|
|
dest_stream.close()
|
|
self.report_finish(format_bytes(state['downloaded_bytes']), time.time() - start)
|
|
|
|
self.try_rename(tmpfilename, filename)
|
|
for frag_file in frags_filenames:
|
|
os.remove(frag_file)
|
|
|
|
fsize = os.path.getsize(encodeFilename(filename))
|
|
self._hook_progress({
|
|
'downloaded_bytes': fsize,
|
|
'total_bytes': fsize,
|
|
'filename': filename,
|
|
'status': 'finished',
|
|
})
|
|
|
|
return True
|