diff options
Diffstat (limited to 'youtube_dl/downloader/f4m.py')
| -rw-r--r-- | youtube_dl/downloader/f4m.py | 80 |
1 files changed, 56 insertions, 24 deletions
diff --git a/youtube_dl/downloader/f4m.py b/youtube_dl/downloader/f4m.py index 71353f607..c460c167a 100644 --- a/youtube_dl/downloader/f4m.py +++ b/youtube_dl/downloader/f4m.py @@ -9,13 +9,16 @@ 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, - compat_urlparse, format_bytes, encodeFilename, sanitize_open, + xpath_text, ) @@ -54,7 +57,7 @@ class FlvReader(io.BytesIO): 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(real_size - header_end) def read_asrt(self): # version @@ -179,29 +182,39 @@ def build_fragments_list(boot_info): 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)): + 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""" +def write_unsigned_int(stream, val): + stream.write(struct_pack('!I', val)) + + +def write_unsigned_int_24(stream, val): + stream.write(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 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 _add_ns(prop): @@ -224,13 +237,16 @@ class F4mFD(FileDownloader): self.to_screen('[download] Downloading f4m manifest') manifest = self.ydl.urlopen(man_url).read() self.report_destination(filename) - http_dl = HttpQuietDownloader(self.ydl, + 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'))] @@ -243,18 +259,32 @@ class F4mFD(FileDownloader): 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) + 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_node = media.find(_add_ns('metadata')) + if metadata_node is not None: + metadata = base64.b64decode(metadata_node.text) + else: + metadata = None 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) + write_flv_header(dest_stream) + write_metadata_tag(dest_stream, metadata) # This dict stores the download progress, it's updated by the progress # hook @@ -267,7 +297,7 @@ class F4mFD(FileDownloader): 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) + (total_frags - state['frag_counter']) * frag_total_bytes) if status['status'] == 'finished': state['downloaded_bytes'] += frag_total_bytes state['frag_counter'] += 1 @@ -277,19 +307,21 @@ class F4mFD(FileDownloader): 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) + 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) + 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: |