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[SponsorBlock] Improve merge algorithm (#999) 

Authored by: nihil-admirari
This commit is contained in:
Nil Admirari 2021-09-19 03:08:50 +00:00 committed by GitHub
parent 7738bd3272
commit c6af2dd8e5
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2 changed files with 72 additions and 37 deletions
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34
test/test_postprocessors.py
View File

@ -461,11 +461,23 @@ class TestModifyChaptersPP(unittest.TestCase):
self._remove_marked_arrange_sponsors_test_impl(
chapters, self._chapters([2, 2.5], ['c1', 'c3']), cuts)
def test_remove_marked_arrange_sponsors_SingleTinyChapterIsPreserved(self):
cuts = [self._chapter(0.5, 2, remove=True)]
chapters = self._chapters([2], ['c']) + cuts
self._remove_marked_arrange_sponsors_test_impl(
chapters, self._chapters([0.5], ['c']), cuts)
def test_remove_marked_arrange_sponsors_TinyChapterAtTheStartPrependedToTheNext(self):
cuts = [self._chapter(0.5, 2, remove=True)]
chapters = self._chapters([2, 4], ['c1', 'c2']) + cuts
self._remove_marked_arrange_sponsors_test_impl(
chapters, self._chapters([2.5], ['c2']), cuts)
def test_remove_marked_arrange_sponsors_TinyChaptersResultingFromSponsorOverlapAreIgnored(self):
chapters = self._chapters([1, 3, 4], ['c1', 'c2', 'c3']) + [
self._sponsor_chapter(1.5, 2.5, 'sponsor')]
self._remove_marked_arrange_sponsors_test_impl(
chapters, self._chapters([1.5, 3, 4], ['c1', '[SponsorBlock]: Sponsor', 'c3']), [])
chapters, self._chapters([1.5, 2.5, 4], ['c1', '[SponsorBlock]: Sponsor', 'c3']), [])
def test_remove_marked_arrange_sponsors_TinySponsorsOverlapsAreIgnored(self):
chapters = self._chapters([2, 3, 5], ['c1', 'c2', 'c3']) + [
@ -476,6 +488,26 @@ class TestModifyChaptersPP(unittest.TestCase):
chapters, self._chapters([1, 3, 4, 5], [
'c1', '[SponsorBlock]: Sponsor', '[SponsorBlock]: Unpaid/Self Promotion', 'c3']), [])
def test_remove_marked_arrange_sponsors_TinySponsorsPrependedToTheNextSponsor(self):
chapters = self._chapters([4], ['c']) + [
self._sponsor_chapter(1.5, 2, 'sponsor'),
self._sponsor_chapter(2, 4, 'selfpromo')
]
self._remove_marked_arrange_sponsors_test_impl(
chapters, self._chapters([1.5, 4], ['c', '[SponsorBlock]: Unpaid/Self Promotion']), [])
def test_remove_marked_arrange_sponsors_SmallestSponsorInTheOverlapGetsNamed(self):
self._pp._sponsorblock_chapter_title = '[SponsorBlock]: %(name)s'
chapters = self._chapters([10], ['c']) + [
self._sponsor_chapter(2, 8, 'sponsor'),
self._sponsor_chapter(4, 6, 'selfpromo')
]
self._remove_marked_arrange_sponsors_test_impl(
chapters, self._chapters([2, 4, 6, 8, 10], [
'c', '[SponsorBlock]: Sponsor', '[SponsorBlock]: Unpaid/Self Promotion',
'[SponsorBlock]: Sponsor', 'c'
]), [])
def test_make_concat_opts_CommonCase(self):
sponsor_chapters = [self._chapter(1, 2, 's1'), self._chapter(10, 20, 's2')]
expected = '''ffconcat version 1.0

75
yt_dlp/postprocessor/modify_chapters.py
View File

@ -15,7 +15,7 @@ from ..utils import (
)
_TINY_SPONSOR_OVERLAP_DURATION = 1
_TINY_CHAPTER_DURATION = 1
DEFAULT_SPONSORBLOCK_CHAPTER_TITLE = '[SponsorBlock]: %(category_names)l'
@ -50,7 +50,6 @@ class ModifyChaptersPP(FFmpegPostProcessor):
if not info.get('__real_download'):
raise PostProcessingError('Cannot cut video since the real and expected durations mismatch. '
'Different chapters may have already been removed')
return [], info
else:
self.write_debug('Expected and actual durations mismatch')
@ -145,38 +144,15 @@ class ModifyChaptersPP(FFmpegPostProcessor):
new_chapters = []
def chapter_length(c):
return c['end_time'] - c['start_time']
def original_uncut_chapter(c):
return '_was_cut' not in c and '_categories' not in c
def append_chapter(c):
assert 'remove' not in c
length = chapter_length(c) - excess_duration(c)
length = c['end_time'] - c['start_time'] - excess_duration(c)
# Chapter is completely covered by cuts or sponsors.
if length <= 0:
return
start = new_chapters[-1]['end_time'] if new_chapters else 0
c.update(start_time=start, end_time=start + length)
# Append without checking for tininess to prevent having
# a completely empty chapter list.
if not new_chapters:
new_chapters.append(c)
return
old_c = new_chapters[-1]
# Merge with the previous if the chapter is tiny.
# Only tiny chapters resulting from a cut can be skipped.
# Chapters that were already tiny in the original list will be preserved.
if not original_uncut_chapter(c) and length < _TINY_SPONSOR_OVERLAP_DURATION:
old_c['end_time'] = c['end_time']
# Previous tiny chapter was appended for the sake of preventing an empty chapter list.
# Replace it with the current one.
elif not original_uncut_chapter(old_c) and chapter_length(old_c) < _TINY_SPONSOR_OVERLAP_DURATION:
c['start_time'] = old_c['start_time']
new_chapters[-1] = c
else:
new_chapters.append(c)
new_chapters.append(c)
# Turn into a priority queue, index is a tie breaker.
# Plain stack sorted by start_time is not enough: after splitting the chapter,
@ -275,10 +251,36 @@ class ModifyChaptersPP(FFmpegPostProcessor):
append_chapter(cur_chapter)
cur_i, cur_chapter = i, c
(append_chapter if 'remove' not in cur_chapter else append_cut)(cur_chapter)
return self._remove_tiny_rename_sponsors(new_chapters), cuts
def _remove_tiny_rename_sponsors(self, chapters):
new_chapters = []
for i, c in enumerate(chapters):
# Merge with the previous/next if the chapter is tiny.
# Only tiny chapters resulting from a cut can be skipped.
# Chapters that were already tiny in the original list will be preserved.
if (('_was_cut' in c or '_categories' in c)
and c['end_time'] - c['start_time'] < _TINY_CHAPTER_DURATION):
if not new_chapters:
# Prepend tiny chapter to the next one if possible.
if i < len(chapters) - 1:
chapters[i + 1]['start_time'] = c['start_time']
continue
else:
old_c = new_chapters[-1]
if i < len(chapters) - 1:
next_c = chapters[i + 1]
# Not a typo: key names in old_c and next_c are really different.
prev_is_sponsor = 'categories' in old_c
next_is_sponsor = '_categories' in next_c
# Preferentially prepend tiny normals to normals and sponsors to sponsors.
if (('_categories' not in c and prev_is_sponsor and not next_is_sponsor)
or ('_categories' in c and not prev_is_sponsor and next_is_sponsor)):
next_c['start_time'] = c['start_time']
continue
old_c['end_time'] = c['end_time']
continue
i = -1
for c in new_chapters.copy():
i += 1
c.pop('_was_cut', None)
cats = c.pop('_categories', None)
if cats:
@ -292,12 +294,13 @@ class ModifyChaptersPP(FFmpegPostProcessor):
})
outtmpl, tmpl_dict = self._downloader.prepare_outtmpl(self._sponsorblock_chapter_title, c)
c['title'] = self._downloader.escape_outtmpl(outtmpl) % tmpl_dict
if i > 0 and c['title'] == new_chapters[i - 1]['title']:
new_chapters[i - 1]['end_time'] = c['end_time']
new_chapters.pop(i)
i -= 1
return new_chapters, cuts
# Merge identically named sponsors.
if (new_chapters and 'categories' in new_chapters[-1]
and new_chapters[-1]['title'] == c['title']):
new_chapters[-1]['end_time'] = c['end_time']
continue
new_chapters.append(c)
return new_chapters
def remove_chapters(self, filename, ranges_to_cut, concat_opts, force_keyframes=False):
in_file = filename