mirror of
https://github.com/ytdl-org/youtube-dl.git
synced 2024-11-16 17:56:05 +00:00
339 lines
11 KiB
Python
339 lines
11 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 ..compat import (
|
|
compat_urlparse,
|
|
)
|
|
from ..utils import (
|
|
struct_pack,
|
|
struct_unpack,
|
|
format_bytes,
|
|
encodeFilename,
|
|
sanitize_open,
|
|
xpath_text,
|
|
)
|
|
|
|
|
|
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,
|
|
'ratelimit': self.params.get('ratelimit', None),
|
|
'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_node = doc.find(_add_ns('bootstrapInfo'))
|
|
if bootstrap_node.text is None:
|
|
bootstrap_url = compat_urlparse.urljoin(
|
|
base_url, bootstrap_node.attrib['url'])
|
|
bootstrap = self.ydl.urlopen(bootstrap_url).read()
|
|
else:
|
|
bootstrap = base64.b64decode(bootstrap_node.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)
|
|
# For some akamai manifests we'll need to add a query to the fragment url
|
|
akamai_pv = xpath_text(doc, _add_ns('pv-2.0'))
|
|
|
|
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
|
|
if akamai_pv:
|
|
url += '?' + akamai_pv.strip(';')
|
|
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
|