X-Git-Url: https://git.rapsys.eu/youtubedl/blobdiff_plain/c512650955de0b16d37e7fa7fb29ea0985e415bb..0bec2c9f91a3b4f834e00c8ea4790481e257d0a2:/youtube_dl/downloader/f4m.py?ds=sidebyside diff --git a/youtube_dl/downloader/f4m.py b/youtube_dl/downloader/f4m.py index e6be6ae..15e71be 100644 --- a/youtube_dl/downloader/f4m.py +++ b/youtube_dl/downloader/f4m.py @@ -1,44 +1,57 @@ -from __future__ import unicode_literals +from __future__ import division, 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, +from .fragment import FragmentFD +from ..compat import ( + compat_b64decode, + compat_etree_fromstring, compat_urlparse, - format_bytes, - encodeFilename, - sanitize_open, + compat_urllib_error, + compat_urllib_parse_urlparse, + compat_struct_pack, + compat_struct_unpack, +) +from ..utils import ( + fix_xml_ampersands, + xpath_text, ) +class DataTruncatedError(Exception): + pass + + class FlvReader(io.BytesIO): """ Reader for Flv files The file format is documented in https://www.adobe.com/devnet/f4v.html """ + def read_bytes(self, n): + data = self.read(n) + if len(data) < n: + raise DataTruncatedError( + 'FlvReader error: need %d bytes while only %d bytes got' % ( + n, len(data))) + return data + # Utility functions for reading numbers and strings def read_unsigned_long_long(self): - return struct_unpack('!Q', self.read(8))[0] + return compat_struct_unpack('!Q', self.read_bytes(8))[0] def read_unsigned_int(self): - return struct_unpack('!I', self.read(4))[0] + return compat_struct_unpack('!I', self.read_bytes(4))[0] def read_unsigned_char(self): - return struct_unpack('!B', self.read(1))[0] + return compat_struct_unpack('!B', self.read_bytes(1))[0] def read_string(self): res = b'' while True: - char = self.read(1) + char = self.read_bytes(1) if char == b'\x00': break res += char @@ -49,18 +62,18 @@ class FlvReader(io.BytesIO): 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) + box_type = self.read_bytes(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) + return real_size, box_type, self.read_bytes(real_size - header_end) def read_asrt(self): # version self.read_unsigned_char() # flags - self.read(3) + self.read_bytes(3) quality_entry_count = self.read_unsigned_char() # QualityEntryCount for i in range(quality_entry_count): @@ -81,7 +94,7 @@ class FlvReader(io.BytesIO): # version self.read_unsigned_char() # flags - self.read(3) + self.read_bytes(3) # time scale self.read_unsigned_int() @@ -115,11 +128,12 @@ class FlvReader(io.BytesIO): # version self.read_unsigned_char() # flags - self.read(3) + self.read_bytes(3) self.read_unsigned_int() # BootstrapinfoVersion # Profile,Live,Update,Reserved - self.read(1) + flags = self.read_unsigned_char() + live = flags & 0x20 != 0 # time scale self.read_unsigned_int() # CurrentMediaTime @@ -158,6 +172,7 @@ class FlvReader(io.BytesIO): return { 'segments': segments, 'fragments': fragments, + 'live': live, } def read_bootstrap_info(self): @@ -174,142 +189,250 @@ 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)) + fragments_counter = itertools.count(first_frag_number) + for segment, fragments_count in segment_run_table['segment_run']: + # In some live HDS streams (for example Rai), `fragments_count` is + # abnormal and causing out-of-memory errors. It's OK to change the + # number of fragments for live streams as they are updated periodically + if fragments_count == 4294967295 and boot_info['live']: + fragments_count = 2 + for _ in range(fragments_count): + res.append((segment, next(fragments_counter))) + + if boot_info['live']: + res = res[-2:] + return res -def write_flv_header(stream, metadata): - """Writes the FLV header and the metadata to stream""" +def write_unsigned_int(stream, val): + stream.write(compat_struct_pack('!I', val)) + + +def write_unsigned_int_24(stream, val): + stream.write(compat_struct_pack('!I', val)[1:]) + + +def write_flv_header(stream): + """Writes the FLV header 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 +def write_metadata_tag(stream, metadata): + """Writes optional metadata tag to stream""" + SCRIPT_TAG = b'\x12' + FLV_TAG_HEADER_LEN = 11 + + if metadata: + stream.write(SCRIPT_TAG) + write_unsigned_int_24(stream, len(metadata)) + stream.write(b'\x00\x00\x00\x00\x00\x00\x00') + stream.write(metadata) + write_unsigned_int(stream, FLV_TAG_HEADER_LEN + len(metadata)) + + +def remove_encrypted_media(media): + return list(filter(lambda e: 'drmAdditionalHeaderId' not in e.attrib and + 'drmAdditionalHeaderSetId' not in e.attrib, + media)) + + +def _add_ns(prop, ver=1): + return '{http://ns.adobe.com/f4m/%d.0}%s' % (ver, prop) -class HttpQuietDownloader(HttpFD): - def to_screen(self, *args, **kargs): - pass +def get_base_url(manifest): + base_url = xpath_text( + manifest, [_add_ns('baseURL'), _add_ns('baseURL', 2)], + 'base URL', default=None) + if base_url: + base_url = base_url.strip() + return base_url -class F4mFD(FileDownloader): +class F4mFD(FragmentFD): """ A downloader for f4m manifests or AdobeHDS. """ + FD_NAME = 'f4m' + + def _get_unencrypted_media(self, doc): + media = doc.findall(_add_ns('media')) + if not media: + self.report_error('No media found') + for e in (doc.findall(_add_ns('drmAdditionalHeader')) + + doc.findall(_add_ns('drmAdditionalHeaderSet'))): + # If id attribute is missing it's valid for all media nodes + # without drmAdditionalHeaderId or drmAdditionalHeaderSetId attribute + if 'id' not in e.attrib: + self.report_error('Missing ID in f4m DRM') + media = remove_encrypted_media(media) + if not media: + self.report_error('Unsupported DRM') + return media + + def _get_bootstrap_from_url(self, bootstrap_url): + bootstrap = self.ydl.urlopen(bootstrap_url).read() + return read_bootstrap_info(bootstrap) + + def _update_live_fragments(self, bootstrap_url, latest_fragment): + fragments_list = [] + retries = 30 + while (not fragments_list) and (retries > 0): + boot_info = self._get_bootstrap_from_url(bootstrap_url) + fragments_list = build_fragments_list(boot_info) + fragments_list = [f for f in fragments_list if f[1] > latest_fragment] + if not fragments_list: + # Retry after a while + time.sleep(5.0) + retries -= 1 + + if not fragments_list: + self.report_error('Failed to update fragments') + + return fragments_list + + def _parse_bootstrap_node(self, node, base_url): + # Sometimes non empty inline bootstrap info can be specified along + # with bootstrap url attribute (e.g. dummy inline bootstrap info + # contains whitespace characters in [1]). We will prefer bootstrap + # url over inline bootstrap info when present. + # 1. http://live-1-1.rutube.ru/stream/1024/HDS/SD/C2NKsS85HQNckgn5HdEmOQ/1454167650/S-s604419906/move/four/dirs/upper/1024-576p.f4m + bootstrap_url = node.get('url') + if bootstrap_url: + bootstrap_url = compat_urlparse.urljoin( + base_url, bootstrap_url) + boot_info = self._get_bootstrap_from_url(bootstrap_url) + else: + bootstrap_url = None + bootstrap = compat_b64decode(node.text) + boot_info = read_bootstrap_info(bootstrap) + return boot_info, bootstrap_url + def real_download(self, filename, info_dict): man_url = info_dict['url'] - 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), - }) + requested_bitrate = info_dict.get('tbr') + self.to_screen('[%s] Downloading f4m manifest' % self.FD_NAME) + + urlh = self.ydl.urlopen(self._prepare_url(info_dict, man_url)) + man_url = urlh.geturl() + # Some manifests may be malformed, e.g. prosiebensat1 generated manifests + # (see https://github.com/rg3/youtube-dl/issues/6215#issuecomment-121704244 + # and https://github.com/rg3/youtube-dl/issues/7823) + manifest = fix_xml_ampersands(urlh.read().decode('utf-8', 'ignore')).strip() + + doc = compat_etree_fromstring(manifest) + formats = [(int(f.attrib.get('bitrate', -1)), f) + for f in self._get_unencrypted_media(doc)] + if requested_bitrate is None or len(formats) == 1: + # 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] + + # Prefer baseURL for relative URLs as per 11.2 of F4M 3.0 spec. + man_base_url = get_base_url(doc) or man_url + + base_url = compat_urlparse.urljoin(man_base_url, media.attrib['url']) + bootstrap_node = doc.find(_add_ns('bootstrapInfo')) + boot_info, bootstrap_url = self._parse_bootstrap_node( + bootstrap_node, man_base_url) + live = boot_info['live'] + metadata_node = media.find(_add_ns('metadata')) + if metadata_node is not None: + metadata = compat_b64decode(metadata_node.text) + else: + metadata = None - doc = etree.fromstring(manifest) - formats = [(int(f.attrib.get('bitrate', -1)), f) for f in doc.findall(_add_ns('media'))] - formats = sorted(formats, key=lambda f: f[0]) - rate, media = formats[-1] - 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): + test = self.params.get('test', False) + if test: # 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, + ctx = { + 'filename': filename, + 'total_frags': total_frags, + 'live': live, } - 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: + + self._prepare_frag_download(ctx) + + dest_stream = ctx['dest_stream'] + + if ctx['complete_frags_downloaded_bytes'] == 0: + write_flv_header(dest_stream) + if not live: + write_metadata_tag(dest_stream, metadata) + + base_url_parsed = compat_urllib_parse_urlparse(base_url) + + self._start_frag_download(ctx) + + frag_index = 0 + while fragments_list: + seg_i, frag_i = fragments_list.pop(0) + frag_index += 1 + if frag_index <= ctx['fragment_index']: + continue 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() + query = [] + if base_url_parsed.query: + query.append(base_url_parsed.query) + if akamai_pv: + query.append(akamai_pv.strip(';')) + if info_dict.get('extra_param_to_segment_url'): + query.append(info_dict['extra_param_to_segment_url']) + url_parsed = base_url_parsed._replace(path=base_url_parsed.path + name, query='&'.join(query)) + try: + success, down_data = self._download_fragment(ctx, url_parsed.geturl(), info_dict) + if not success: + return False reader = FlvReader(down_data) while True: - _, box_type, box_data = reader.read_box_info() + try: + _, box_type, box_data = reader.read_box_info() + except DataTruncatedError: + if test: + # In tests, segments may be truncated, and thus + # FlvReader may not be able to parse the whole + # chunk. If so, write the segment as is + # See https://github.com/rg3/youtube-dl/issues/9214 + dest_stream.write(down_data) + break + raise if box_type == b'mdat': - dest_stream.write(box_data) + self._append_fragment(ctx, 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', - }) + except (compat_urllib_error.HTTPError, ) as err: + if live and (err.code == 404 or err.code == 410): + # We didn't keep up with the live window. Continue + # with the next available fragment. + msg = 'Fragment %d unavailable' % frag_i + self.report_warning(msg) + fragments_list = [] + else: + raise + + if not fragments_list and not test and live and bootstrap_url: + fragments_list = self._update_live_fragments(bootstrap_url, frag_i) + total_frags += len(fragments_list) + if fragments_list and (fragments_list[0][1] > frag_i + 1): + msg = 'Missed %d fragments' % (fragments_list[0][1] - (frag_i + 1)) + self.report_warning(msg) + + self._finish_frag_download(ctx) return True