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Add option --lazy-playlist to process entries as they are received

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pukkandan 2022-06-17 13:35:04 +05:30
parent 0df111a371
commit 7e9a612585
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6 changed files with 97 additions and 66 deletions
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5
README.md
View file

@ -540,6 +540,11 @@ ## Download Options:
bandwidth throttling imposed by a webserver
(experimental)
--playlist-random Download playlist videos in random order
--lazy-playlist Process entries in the playlist as they are
received. This disables n_entries,
--playlist-random and --playlist-reverse
--no-lazy-playlist Process videos in the playlist only after
the entire playlist is parsed (default)
--xattr-set-filesize Set file xattribute ytdl.filesize with
expected file size
--hls-use-mpegts Use the mpegts container for HLS videos;

2
test/test_YoutubeDL.py
View file

@ -1046,7 +1046,7 @@ def test_selection(params, expected_ids, evaluate_all=False):
for name, func, expected_eval in (
('list', list_entries, INDICES),
('Generator', generator_entries, generator_eval),
('LazyList', lazylist_entries, generator_eval),
# ('LazyList', lazylist_entries, generator_eval), # Generator and LazyList follow the exact same code path
('PagedList', pagedlist_entries, pagedlist_eval),
):
evaluated = []

59
yt_dlp/YoutubeDL.py
View file

@ -242,11 +242,9 @@ class YoutubeDL:
and don't overwrite any file if False
For compatibility with youtube-dl,
"nooverwrites" may also be used instead
playliststart: Playlist item to start at.
playlistend: Playlist item to end at.
playlist_items: Specific indices of playlist to download.
playlistreverse: Download playlist items in reverse order.
playlistrandom: Download playlist items in random order.
lazy_playlist: Process playlist entries as they are received.
matchtitle: Download only matching titles.
rejecttitle: Reject downloads for matching titles.
logger: Log messages to a logging.Logger instance.
@ -469,6 +467,12 @@ class YoutubeDL:
The following options are deprecated and may be removed in the future:
playliststart: - Use playlist_items
Playlist item to start at.
playlistend: - Use playlist_items
Playlist item to end at.
playlistreverse: - Use playlist_items
Download playlist items in reverse order.
forceurl: - Use forceprint
Force printing final URL.
forcetitle: - Use forceprint
@ -1671,16 +1675,26 @@ def __process_playlist(self, ie_result, download):
self.to_screen(f'[download] Downloading playlist: {title}')
all_entries = PlaylistEntries(self, ie_result)
entries = orderedSet(all_entries.get_requested_items())
ie_result['requested_entries'], ie_result['entries'] = tuple(zip(*entries)) or ([], [])
n_entries, ie_result['playlist_count'] = len(entries), all_entries.full_count
entries = orderedSet(all_entries.get_requested_items(), lazy=True)
lazy = self.params.get('lazy_playlist')
if lazy:
resolved_entries, n_entries = [], 'N/A'
ie_result['requested_entries'], ie_result['entries'] = None, None
else:
entries = resolved_entries = list(entries)
n_entries = len(resolved_entries)
ie_result['requested_entries'], ie_result['entries'] = tuple(zip(*resolved_entries)) or ([], [])
if not ie_result.get('playlist_count'):
# Better to do this after potentially exhausting entries
ie_result['playlist_count'] = all_entries.get_full_count()
_infojson_written = False
write_playlist_files = self.params.get('allow_playlist_files', True)
if write_playlist_files and self.params.get('list_thumbnails'):
self.list_thumbnails(ie_result)
if write_playlist_files and not self.params.get('simulate'):
ie_copy = self._playlist_infodict(ie_result, n_entries=n_entries)
ie_copy = self._playlist_infodict(ie_result, n_entries=int_or_none(n_entries))
_infojson_written = self._write_info_json(
'playlist', ie_result, self.prepare_filename(ie_copy, 'pl_infojson'))
if _infojson_written is None:
@ -1691,9 +1705,12 @@ def __process_playlist(self, ie_result, download):
# TODO: This should be passed to ThumbnailsConvertor if necessary
self._write_thumbnails('playlist', ie_copy, self.prepare_filename(ie_copy, 'pl_thumbnail'))
if self.params.get('playlistreverse', False):
entries = entries[::-1]
if self.params.get('playlistrandom', False):
if lazy:
if self.params.get('playlistreverse') or self.params.get('playlistrandom'):
self.report_warning('playlistreverse and playlistrandom are not supported with lazy_playlist', only_once=True)
elif self.params.get('playlistreverse'):
entries.reverse()
elif self.params.get('playlistrandom'):
random.shuffle(entries)
self.to_screen(f'[{ie_result["extractor"]}] Playlist {title}: Downloading {n_entries} videos'
@ -1701,23 +1718,27 @@ def __process_playlist(self, ie_result, download):
failures = 0
max_failures = self.params.get('skip_playlist_after_errors') or float('inf')
for i, (playlist_index, entry) in enumerate(entries, 1):
for i, (playlist_index, entry) in enumerate(entries):
if lazy:
resolved_entries.append((playlist_index, entry))
# TODO: Add auto-generated fields
if self._match_entry(entry, incomplete=True) is not None:
continue
if 'playlist-index' in self.params.get('compat_opts', []):
playlist_index = ie_result['requested_entries'][i - 1]
self.to_screen('[download] Downloading video %s of %s' % (
self._format_screen(i, self.Styles.ID), self._format_screen(n_entries, self.Styles.EMPHASIS)))
self._format_screen(i + 1, self.Styles.ID), self._format_screen(n_entries, self.Styles.EMPHASIS)))
entry['__x_forwarded_for_ip'] = ie_result.get('__x_forwarded_for_ip')
if not lazy and 'playlist-index' in self.params.get('compat_opts', []):
playlist_index = ie_result['requested_entries'][i]
entry_result = self.__process_iterable_entry(entry, download, {
'n_entries': n_entries,
'__last_playlist_index': max(ie_result['requested_entries']),
'n_entries': int_or_none(n_entries),
'__last_playlist_index': max(ie_result['requested_entries'] or (0, 0)),
'playlist_count': ie_result.get('playlist_count'),
'playlist_index': playlist_index,
'playlist_autonumber': i,
'playlist_autonumber': i + 1,
'playlist': title,
'playlist_id': ie_result.get('id'),
'playlist_title': ie_result.get('title'),
@ -1735,10 +1756,10 @@ def __process_playlist(self, ie_result, download):
self.report_error(
f'Skipping the remaining entries in playlist "{title}" since {failures} items failed extraction')
break
entries[i - 1] = (playlist_index, entry_result)
resolved_entries[i] = (playlist_index, entry_result)
# Update with processed data
ie_result['requested_entries'], ie_result['entries'] = tuple(zip(*entries)) or ([], [])
ie_result['requested_entries'], ie_result['entries'] = tuple(zip(*resolved_entries)) or ([], [])
# Write the updated info to json
if _infojson_written is True and self._write_info_json(

4
yt_dlp/__init__.py
View file

@ -434,6 +434,9 @@ def report_conflict(arg1, opt1, arg2='--allow-unplayable-formats', opt2='allow_u
setattr(opts, opt1, default)
# Conflicting options
report_conflict('--playlist-reverse', 'playlist_reverse', '--playlist-random', 'playlist_random')
report_conflict('--playlist-reverse', 'playlist_reverse', '--lazy-playlist', 'lazy_playlist')
report_conflict('--playlist-random', 'playlist_random', '--lazy-playlist', 'lazy_playlist')
report_conflict('--dateafter', 'dateafter', '--date', 'date', default=None)
report_conflict('--datebefore', 'datebefore', '--date', 'date', default=None)
report_conflict('--exec-before-download', 'exec_before_dl_cmd',
@ -740,6 +743,7 @@ def parse_options(argv=None):
'playlistend': opts.playlistend,
'playlistreverse': opts.playlist_reverse,
'playlistrandom': opts.playlist_random,
'lazy_playlist': opts.lazy_playlist,
'noplaylist': opts.noplaylist,
'logtostderr': opts.outtmpl.get('default') == '-',
'consoletitle': opts.consoletitle,

12
yt_dlp/options.py
View file

@ -888,7 +888,7 @@ def _alias_callback(option, opt_str, value, parser, opts, nargs):
help=optparse.SUPPRESS_HELP)
downloader.add_option(
'--playlist-reverse',
action='store_true',
action='store_true', dest='playlist_reverse',
help=optparse.SUPPRESS_HELP)
downloader.add_option(
'--no-playlist-reverse',
@ -896,8 +896,16 @@ def _alias_callback(option, opt_str, value, parser, opts, nargs):
help=optparse.SUPPRESS_HELP)
downloader.add_option(
'--playlist-random',
action='store_true',
action='store_true', dest='playlist_random',
help='Download playlist videos in random order')
downloader.add_option(
'--lazy-playlist',
action='store_true', dest='lazy_playlist',
help='Process entries in the playlist as they are received. This disables n_entries, --playlist-random and --playlist-reverse')
downloader.add_option(
'--no-lazy-playlist',
action='store_false', dest='lazy_playlist',
help='Process videos in the playlist only after the entire playlist is parsed (default)')
downloader.add_option(
'--xattr-set-filesize',
dest='xattr_set_filesize', action='store_true',

81
yt_dlp/utils.py
View file

@ -770,13 +770,16 @@ def expand_path(s):
return os.path.expandvars(compat_expanduser(s))
def orderedSet(iterable):
""" Remove all duplicates from the input iterable """
res = []
for el in iterable:
if el not in res:
res.append(el)
return res
def orderedSet(iterable, *, lazy=False):
"""Remove all duplicates from the input iterable"""
def _iter():
seen = [] # Do not use set since the items can be unhashable
for x in iterable:
if x not in seen:
seen.append(x)
yield x
return _iter() if lazy else list(_iter())
def _htmlentity_transform(entity_with_semicolon):
@ -2820,7 +2823,26 @@ class PlaylistEntries:
is_exhausted = False
def __init__(self, ydl, info_dict):
self.ydl, self.info_dict = ydl, info_dict
self.ydl = ydl
# _entries must be assigned now since infodict can change during iteration
entries = info_dict.get('entries')
if entries is None:
raise EntryNotInPlaylist('There are no entries')
elif isinstance(entries, list):
self.is_exhausted = True
requested_entries = info_dict.get('requested_entries')
self.is_incomplete = bool(requested_entries)
if self.is_incomplete:
assert self.is_exhausted
self._entries = [self.MissingEntry] * max(requested_entries)
for i, entry in zip(requested_entries, entries):
self._entries[i - 1] = entry
elif isinstance(entries, (list, PagedList, LazyList)):
self._entries = entries
else:
self._entries = LazyList(entries)
PLAYLIST_ITEMS_RE = re.compile(r'''(?x)
(?P<start>[+-]?\d+)?
@ -2863,37 +2885,13 @@ def get_requested_items(self):
except (ExistingVideoReached, RejectedVideoReached):
return
@property
def full_count(self):
if self.info_dict.get('playlist_count'):
return self.info_dict['playlist_count']
elif self.is_exhausted and not self.is_incomplete:
def get_full_count(self):
if self.is_exhausted and not self.is_incomplete:
return len(self)
elif isinstance(self._entries, InAdvancePagedList):
if self._entries._pagesize == 1:
return self._entries._pagecount
@functools.cached_property
def _entries(self):
entries = self.info_dict.get('entries')
if entries is None:
raise EntryNotInPlaylist('There are no entries')
elif isinstance(entries, list):
self.is_exhausted = True
indices = self.info_dict.get('requested_entries')
self.is_incomplete = bool(indices)
if self.is_incomplete:
assert self.is_exhausted
ret = [self.MissingEntry] * max(indices)
for i, entry in zip(indices, entries):
ret[i - 1] = entry
return ret
if isinstance(entries, (list, PagedList, LazyList)):
return entries
return LazyList(entries)
@functools.cached_property
def _getter(self):
if isinstance(self._entries, list):
@ -2937,17 +2935,12 @@ def __getitem__(self, idx):
if i < 0:
continue
try:
try:
entry = self._getter(i)
except self.IndexError:
self.is_exhausted = True
if step > 0:
break
continue
except IndexError:
if self.is_exhausted:
entry = self._getter(i)
except self.IndexError:
self.is_exhausted = True
if step > 0:
break
raise
continue
yield i + 1, entry
def __len__(self):