diff options
Diffstat (limited to 'youtube_dl/downloader/f4m.py')
| -rw-r--r-- | youtube_dl/downloader/f4m.py | 100 |
1 files changed, 78 insertions, 22 deletions
diff --git a/youtube_dl/downloader/f4m.py b/youtube_dl/downloader/f4m.py index 7b8fe8cf5..3dc796faa 100644 --- a/youtube_dl/downloader/f4m.py +++ b/youtube_dl/downloader/f4m.py @@ -11,6 +11,7 @@ from .common import FileDownloader from .http import HttpFD from ..compat import ( compat_urlparse, + compat_urllib_error, ) from ..utils import ( struct_pack, @@ -121,7 +122,8 @@ class FlvReader(io.BytesIO): 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 @@ -160,6 +162,7 @@ class FlvReader(io.BytesIO): return { 'segments': segments, 'fragments': fragments, + 'live': live, } def read_bootstrap_info(self): @@ -182,6 +185,10 @@ def build_fragments_list(boot_info): for segment, fragments_count in segment_run_table['segment_run']: for _ in range(fragments_count): res.append((segment, next(fragments_counter))) + + if boot_info['live']: + res = res[-2:] + return res @@ -246,6 +253,38 @@ class F4mFD(FileDownloader): 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): + if node.text is None: + bootstrap_url = compat_urlparse.urljoin( + base_url, node.attrib['url']) + boot_info = self._get_bootstrap_from_url(bootstrap_url) + else: + bootstrap_url = None + bootstrap = base64.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'] requested_bitrate = info_dict.get('tbr') @@ -265,18 +304,13 @@ class F4mFD(FileDownloader): 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) + boot_info, bootstrap_url = self._parse_bootstrap_node(bootstrap_node, base_url) + live = boot_info['live'] 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): @@ -301,7 +335,8 @@ class F4mFD(FileDownloader): (dest_stream, tmpfilename) = sanitize_open(tmpfilename, 'wb') write_flv_header(dest_stream) - write_metadata_tag(dest_stream, metadata) + if not live: + write_metadata_tag(dest_stream, metadata) # This dict stores the download progress, it's updated by the progress # hook @@ -348,24 +383,45 @@ class F4mFD(FileDownloader): http_dl.add_progress_hook(frag_progress_hook) frags_filenames = [] - for (seg_i, frag_i) in fragments_list: + while fragments_list: + seg_i, frag_i = fragments_list.pop(0) 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) + try: + 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 + if live: + os.remove(frag_filename) + else: + frags_filenames.append(frag_filename) + 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 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) dest_stream.close() |