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https://github.com/yt-dlp/yt-dlp
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Merge pull request #6392 from dstftw/generalized-fragmented-fd
Generalized fragmented media file downloader
This commit is contained in:
Sergey M.
commit
75e8b2ac87
3 changed files with 165 additions and 124 deletions
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@ -7,8 +7,7 @@ import os
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import time
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import xml.etree.ElementTree as etree
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from .common import FileDownloader
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from .http import HttpFD
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from .fragment import FragmentFD
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from ..compat import (
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compat_urlparse,
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compat_urllib_error,
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@ -16,8 +15,6 @@ from ..compat import (
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from ..utils import (
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struct_pack,
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struct_unpack,
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encodeFilename,
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sanitize_open,
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xpath_text,
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)
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@ -226,16 +223,13 @@ def _add_ns(prop):
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return '{http://ns.adobe.com/f4m/1.0}%s' % prop
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class HttpQuietDownloader(HttpFD):
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def to_screen(self, *args, **kargs):
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pass
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class F4mFD(FileDownloader):
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class F4mFD(FragmentFD):
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"""
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A downloader for f4m manifests or AdobeHDS.
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"""
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FD_NAME = 'f4m'
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def _get_unencrypted_media(self, doc):
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media = doc.findall(_add_ns('media'))
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if not media:
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@ -288,7 +282,7 @@ class F4mFD(FileDownloader):
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def real_download(self, filename, info_dict):
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man_url = info_dict['url']
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requested_bitrate = info_dict.get('tbr')
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self.to_screen('[download] Downloading f4m manifest')
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self.to_screen('[%s] Downloading f4m manifest' % self.FD_NAME)
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manifest = self.ydl.urlopen(man_url).read()
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doc = etree.fromstring(manifest)
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@ -320,67 +314,20 @@ class F4mFD(FileDownloader):
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# For some akamai manifests we'll need to add a query to the fragment url
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akamai_pv = xpath_text(doc, _add_ns('pv-2.0'))
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self.report_destination(filename)
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http_dl = HttpQuietDownloader(
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self.ydl,
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{
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'continuedl': True,
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'quiet': True,
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'noprogress': True,
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'ratelimit': self.params.get('ratelimit', None),
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'test': self.params.get('test', False),
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}
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)
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tmpfilename = self.temp_name(filename)
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(dest_stream, tmpfilename) = sanitize_open(tmpfilename, 'wb')
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ctx = {
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'filename': filename,
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'total_frags': total_frags,
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}
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self._prepare_frag_download(ctx)
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dest_stream = ctx['dest_stream']
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write_flv_header(dest_stream)
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if not live:
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write_metadata_tag(dest_stream, metadata)
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# This dict stores the download progress, it's updated by the progress
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# hook
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state = {
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'status': 'downloading',
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'downloaded_bytes': 0,
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'frag_index': 0,
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'frag_count': total_frags,
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'filename': filename,
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'tmpfilename': tmpfilename,
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}
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start = time.time()
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def frag_progress_hook(s):
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if s['status'] not in ('downloading', 'finished'):
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return
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frag_total_bytes = s.get('total_bytes', 0)
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if s['status'] == 'finished':
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state['downloaded_bytes'] += frag_total_bytes
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state['frag_index'] += 1
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estimated_size = (
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(state['downloaded_bytes'] + frag_total_bytes) /
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(state['frag_index'] + 1) * total_frags)
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time_now = time.time()
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state['total_bytes_estimate'] = estimated_size
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state['elapsed'] = time_now - start
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if s['status'] == 'finished':
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progress = self.calc_percent(state['frag_index'], total_frags)
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else:
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frag_downloaded_bytes = s['downloaded_bytes']
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frag_progress = self.calc_percent(frag_downloaded_bytes,
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frag_total_bytes)
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progress = self.calc_percent(state['frag_index'], total_frags)
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progress += frag_progress / float(total_frags)
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state['eta'] = self.calc_eta(
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start, time_now, estimated_size, state['downloaded_bytes'] + frag_downloaded_bytes)
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state['speed'] = s.get('speed')
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self._hook_progress(state)
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http_dl.add_progress_hook(frag_progress_hook)
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self._start_frag_download(ctx)
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frags_filenames = []
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while fragments_list:
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@ -391,9 +338,9 @@ class F4mFD(FileDownloader):
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url += '?' + akamai_pv.strip(';')
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if info_dict.get('extra_param_to_segment_url'):
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url += info_dict.get('extra_param_to_segment_url')
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frag_filename = '%s-%s' % (tmpfilename, name)
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frag_filename = '%s-%s' % (ctx['tmpfilename'], name)
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try:
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success = http_dl.download(frag_filename, {'url': url})
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success = ctx['dl'].download(frag_filename, {'url': url})
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if not success:
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return False
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with open(frag_filename, 'rb') as down:
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@ -425,20 +372,9 @@ class F4mFD(FileDownloader):
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msg = 'Missed %d fragments' % (fragments_list[0][1] - (frag_i + 1))
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self.report_warning(msg)
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dest_stream.close()
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self._finish_frag_download(ctx)
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elapsed = time.time() - start
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self.try_rename(tmpfilename, filename)
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for frag_file in frags_filenames:
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os.remove(frag_file)
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fsize = os.path.getsize(encodeFilename(filename))
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self._hook_progress({
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'downloaded_bytes': fsize,
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'total_bytes': fsize,
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'filename': filename,
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'status': 'finished',
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'elapsed': elapsed,
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})
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return True
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110
youtube_dl/downloader/fragment.py
Normal file
110
youtube_dl/downloader/fragment.py
Normal file
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@ -0,0 +1,110 @@
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from __future__ import division, unicode_literals
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import os
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import time
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from .common import FileDownloader
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from .http import HttpFD
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from ..utils import (
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encodeFilename,
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sanitize_open,
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)
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class HttpQuietDownloader(HttpFD):
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def to_screen(self, *args, **kargs):
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pass
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class FragmentFD(FileDownloader):
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"""
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A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests).
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"""
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def _prepare_and_start_frag_download(self, ctx):
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self._prepare_frag_download(ctx)
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self._start_frag_download(ctx)
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def _prepare_frag_download(self, ctx):
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self.to_screen('[%s] Total fragments: %d' % (self.FD_NAME, ctx['total_frags']))
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self.report_destination(ctx['filename'])
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dl = HttpQuietDownloader(
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self.ydl,
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{
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'continuedl': True,
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'quiet': True,
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'noprogress': True,
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'ratelimit': self.params.get('ratelimit', None),
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'test': self.params.get('test', False),
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}
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)
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tmpfilename = self.temp_name(ctx['filename'])
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dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb')
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ctx.update({
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'dl': dl,
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'dest_stream': dest_stream,
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'tmpfilename': tmpfilename,
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})
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def _start_frag_download(self, ctx):
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total_frags = ctx['total_frags']
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# This dict stores the download progress, it's updated by the progress
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# hook
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state = {
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'status': 'downloading',
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'downloaded_bytes': 0,
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'frag_index': 0,
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'frag_count': total_frags,
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'filename': ctx['filename'],
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'tmpfilename': ctx['tmpfilename'],
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}
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start = time.time()
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ctx['started'] = start
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def frag_progress_hook(s):
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if s['status'] not in ('downloading', 'finished'):
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return
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frag_total_bytes = s.get('total_bytes', 0)
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if s['status'] == 'finished':
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state['downloaded_bytes'] += frag_total_bytes
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state['frag_index'] += 1
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estimated_size = (
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(state['downloaded_bytes'] + frag_total_bytes) /
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(state['frag_index'] + 1) * total_frags)
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time_now = time.time()
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state['total_bytes_estimate'] = estimated_size
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state['elapsed'] = time_now - start
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if s['status'] == 'finished':
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progress = self.calc_percent(state['frag_index'], total_frags)
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else:
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frag_downloaded_bytes = s['downloaded_bytes']
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frag_progress = self.calc_percent(frag_downloaded_bytes,
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frag_total_bytes)
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progress = self.calc_percent(state['frag_index'], total_frags)
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progress += frag_progress / float(total_frags)
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state['eta'] = self.calc_eta(
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start, time_now, estimated_size, state['downloaded_bytes'] + frag_downloaded_bytes)
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state['speed'] = s.get('speed')
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self._hook_progress(state)
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ctx['dl'].add_progress_hook(frag_progress_hook)
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return start
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def _finish_frag_download(self, ctx):
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ctx['dest_stream'].close()
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elapsed = time.time() - ctx['started']
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self.try_rename(ctx['tmpfilename'], ctx['filename'])
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fsize = os.path.getsize(encodeFilename(ctx['filename']))
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self._hook_progress({
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'downloaded_bytes': fsize,
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'total_bytes': fsize,
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'filename': ctx['filename'],
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'status': 'finished',
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'elapsed': elapsed,
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})
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@ -4,12 +4,11 @@ import os
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import re
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import subprocess
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from ..postprocessor.ffmpeg import FFmpegPostProcessor
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from .common import FileDownloader
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from ..compat import (
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compat_urlparse,
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compat_urllib_request,
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)
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from .fragment import FragmentFD
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from ..compat import compat_urlparse
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from ..postprocessor.ffmpeg import FFmpegPostProcessor
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from ..utils import (
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encodeArgument,
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encodeFilename,
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@ -51,54 +50,50 @@ class HlsFD(FileDownloader):
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return False
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class NativeHlsFD(FileDownloader):
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class NativeHlsFD(FragmentFD):
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""" A more limited implementation that does not require ffmpeg """
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def real_download(self, filename, info_dict):
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url = info_dict['url']
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self.report_destination(filename)
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tmpfilename = self.temp_name(filename)
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FD_NAME = 'hlsnative'
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self.to_screen(
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'[hlsnative] %s: Downloading m3u8 manifest' % info_dict['id'])
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data = self.ydl.urlopen(url).read()
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s = data.decode('utf-8', 'ignore')
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segment_urls = []
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def real_download(self, filename, info_dict):
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man_url = info_dict['url']
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self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME)
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manifest = self.ydl.urlopen(man_url).read()
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s = manifest.decode('utf-8', 'ignore')
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fragment_urls = []
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for line in s.splitlines():
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line = line.strip()
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if line and not line.startswith('#'):
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segment_url = (
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line
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if re.match(r'^https?://', line)
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else compat_urlparse.urljoin(url, line))
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segment_urls.append(segment_url)
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is_test = self.params.get('test', False)
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remaining_bytes = self._TEST_FILE_SIZE if is_test else None
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byte_counter = 0
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with open(tmpfilename, 'wb') as outf:
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for i, segurl in enumerate(segment_urls):
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self.to_screen(
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'[hlsnative] %s: Downloading segment %d / %d' %
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(info_dict['id'], i + 1, len(segment_urls)))
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seg_req = compat_urllib_request.Request(segurl)
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if remaining_bytes is not None:
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seg_req.add_header('Range', 'bytes=0-%d' % (remaining_bytes - 1))
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segment = self.ydl.urlopen(seg_req).read()
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if remaining_bytes is not None:
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segment = segment[:remaining_bytes]
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remaining_bytes -= len(segment)
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outf.write(segment)
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byte_counter += len(segment)
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if remaining_bytes is not None and remaining_bytes <= 0:
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else compat_urlparse.urljoin(man_url, line))
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fragment_urls.append(segment_url)
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# We only download the first fragment during the test
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if self.params.get('test', False):
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break
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self._hook_progress({
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'downloaded_bytes': byte_counter,
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'total_bytes': byte_counter,
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ctx = {
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'filename': filename,
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'status': 'finished',
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})
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self.try_rename(tmpfilename, filename)
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'total_frags': len(fragment_urls),
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}
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self._prepare_and_start_frag_download(ctx)
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frags_filenames = []
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for i, frag_url in enumerate(fragment_urls):
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frag_filename = '%s-Frag%d' % (ctx['tmpfilename'], i)
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success = ctx['dl'].download(frag_filename, {'url': frag_url})
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if not success:
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return False
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with open(frag_filename, 'rb') as down:
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ctx['dest_stream'].write(down.read())
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frags_filenames.append(frag_filename)
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self._finish_frag_download(ctx)
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for frag_file in frags_filenames:
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os.remove(frag_file)
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return True
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