mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-12-15 10:05:24 +01:00
329 lines
16 KiB
Python
329 lines
16 KiB
Python
import copy
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import heapq
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import os
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from .common import PostProcessor
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from .ffmpeg import (
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FFmpegPostProcessor,
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FFmpegSubtitlesConvertorPP
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)
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from .sponsorblock import SponsorBlockPP
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from ..utils import (
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orderedSet,
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PostProcessingError,
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prepend_extension,
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)
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_TINY_CHAPTER_DURATION = 1
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DEFAULT_SPONSORBLOCK_CHAPTER_TITLE = '[SponsorBlock]: %(category_names)l'
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class ModifyChaptersPP(FFmpegPostProcessor):
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def __init__(self, downloader, remove_chapters_patterns=None, remove_sponsor_segments=None,
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sponsorblock_chapter_title=DEFAULT_SPONSORBLOCK_CHAPTER_TITLE, force_keyframes=False):
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FFmpegPostProcessor.__init__(self, downloader)
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self._remove_chapters_patterns = set(remove_chapters_patterns or [])
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self._remove_sponsor_segments = set(remove_sponsor_segments or [])
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self._sponsorblock_chapter_title = sponsorblock_chapter_title
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self._force_keyframes = force_keyframes
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@PostProcessor._restrict_to(images=False)
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def run(self, info):
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chapters, sponsor_chapters = self._mark_chapters_to_remove(
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info.get('chapters') or [], info.get('sponsorblock_chapters') or [])
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if not chapters and not sponsor_chapters:
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return [], info
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real_duration = self._get_real_video_duration(info)
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if not chapters:
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chapters = [{'start_time': 0, 'end_time': real_duration, 'title': info['title']}]
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info['chapters'], cuts = self._remove_marked_arrange_sponsors(chapters + sponsor_chapters)
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if not cuts:
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return [], info
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if self._duration_mismatch(real_duration, info.get('duration')):
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if not self._duration_mismatch(real_duration, info['chapters'][-1]['end_time']):
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self.to_screen(f'Skipping {self.pp_key()} since the video appears to be already cut')
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return [], info
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if not info.get('__real_download'):
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raise PostProcessingError('Cannot cut video since the real and expected durations mismatch. '
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'Different chapters may have already been removed')
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else:
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self.write_debug('Expected and actual durations mismatch')
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concat_opts = self._make_concat_opts(cuts, real_duration)
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def remove_chapters(file, is_sub):
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return file, self.remove_chapters(file, cuts, concat_opts, self._force_keyframes and not is_sub)
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in_out_files = [remove_chapters(info['filepath'], False)]
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in_out_files.extend(remove_chapters(in_file, True) for in_file in self._get_supported_subs(info))
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# Renaming should only happen after all files are processed
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files_to_remove = []
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for in_file, out_file in in_out_files:
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uncut_file = prepend_extension(in_file, 'uncut')
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os.replace(in_file, uncut_file)
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os.replace(out_file, in_file)
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files_to_remove.append(uncut_file)
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info['_real_duration'] = info['chapters'][-1]['end_time']
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return files_to_remove, info
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def _mark_chapters_to_remove(self, chapters, sponsor_chapters):
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if self._remove_chapters_patterns:
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warn_no_chapter_to_remove = True
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if not chapters:
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self.to_screen('Chapter information is unavailable')
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warn_no_chapter_to_remove = False
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for c in chapters:
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if any(regex.search(c['title']) for regex in self._remove_chapters_patterns):
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c['remove'] = True
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warn_no_chapter_to_remove = False
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if warn_no_chapter_to_remove:
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self.to_screen('There are no chapters matching the regex')
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if self._remove_sponsor_segments:
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warn_no_chapter_to_remove = True
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if not sponsor_chapters:
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self.to_screen('SponsorBlock information is unavailable')
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warn_no_chapter_to_remove = False
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for c in sponsor_chapters:
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if c['category'] in self._remove_sponsor_segments:
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c['remove'] = True
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warn_no_chapter_to_remove = False
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if warn_no_chapter_to_remove:
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self.to_screen('There are no matching SponsorBlock chapters')
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return chapters, sponsor_chapters
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def _get_supported_subs(self, info):
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for sub in (info.get('requested_subtitles') or {}).values():
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sub_file = sub.get('filepath')
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# The file might have been removed by --embed-subs
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if not sub_file or not os.path.exists(sub_file):
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continue
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ext = sub['ext']
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if ext not in FFmpegSubtitlesConvertorPP.SUPPORTED_EXTS:
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self.report_warning(f'Cannot remove chapters from external {ext} subtitles; "{sub_file}" is now out of sync')
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continue
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# TODO: create __real_download for subs?
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yield sub_file
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def _remove_marked_arrange_sponsors(self, chapters):
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# Store cuts separately, since adjacent and overlapping cuts must be merged.
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cuts = []
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def append_cut(c):
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assert 'remove' in c
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last_to_cut = cuts[-1] if cuts else None
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if last_to_cut and last_to_cut['end_time'] >= c['start_time']:
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last_to_cut['end_time'] = max(last_to_cut['end_time'], c['end_time'])
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else:
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cuts.append(c)
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return len(cuts) - 1
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def excess_duration(c):
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# Cuts that are completely within the chapter reduce chapters' duration.
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# Since cuts can overlap, excess duration may be less that the sum of cuts' durations.
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# To avoid that, chapter stores the index to the fist cut within the chapter,
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# instead of storing excess duration. append_cut ensures that subsequent cuts (if any)
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# will be merged with previous ones (if necessary).
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cut_idx, excess = c.pop('cut_idx', len(cuts)), 0
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while cut_idx < len(cuts):
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cut = cuts[cut_idx]
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if cut['start_time'] >= c['end_time']:
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break
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if cut['end_time'] > c['start_time']:
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excess += min(cut['end_time'], c['end_time'])
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excess -= max(cut['start_time'], c['start_time'])
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cut_idx += 1
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return excess
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new_chapters = []
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def append_chapter(c):
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assert 'remove' not in c
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length = c['end_time'] - c['start_time'] - excess_duration(c)
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# Chapter is completely covered by cuts or sponsors.
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if length <= 0:
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return
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start = new_chapters[-1]['end_time'] if new_chapters else 0
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c.update(start_time=start, end_time=start + length)
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new_chapters.append(c)
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# Turn into a priority queue, index is a tie breaker.
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# Plain stack sorted by start_time is not enough: after splitting the chapter,
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# the part returned to the stack is not guaranteed to have start_time
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# less than or equal to the that of the stack's head.
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chapters = [(c['start_time'], i, c) for i, c in enumerate(chapters)]
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heapq.heapify(chapters)
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_, cur_i, cur_chapter = heapq.heappop(chapters)
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while chapters:
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_, i, c = heapq.heappop(chapters)
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# Non-overlapping chapters or cuts can be appended directly. However,
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# adjacent non-overlapping cuts must be merged, which is handled by append_cut.
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if cur_chapter['end_time'] <= c['start_time']:
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(append_chapter if 'remove' not in cur_chapter else append_cut)(cur_chapter)
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cur_i, cur_chapter = i, c
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continue
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# Eight possibilities for overlapping chapters: (cut, cut), (cut, sponsor),
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# (cut, normal), (sponsor, cut), (normal, cut), (sponsor, sponsor),
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# (sponsor, normal), and (normal, sponsor). There is no (normal, normal):
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# normal chapters are assumed not to overlap.
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if 'remove' in cur_chapter:
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# (cut, cut): adjust end_time.
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if 'remove' in c:
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cur_chapter['end_time'] = max(cur_chapter['end_time'], c['end_time'])
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# (cut, sponsor/normal): chop the beginning of the later chapter
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# (if it's not completely hidden by the cut). Push to the priority queue
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# to restore sorting by start_time: with beginning chopped, c may actually
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# start later than the remaining chapters from the queue.
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elif cur_chapter['end_time'] < c['end_time']:
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c['start_time'] = cur_chapter['end_time']
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c['_was_cut'] = True
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heapq.heappush(chapters, (c['start_time'], i, c))
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# (sponsor/normal, cut).
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elif 'remove' in c:
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cur_chapter['_was_cut'] = True
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# Chop the end of the current chapter if the cut is not contained within it.
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# Chopping the end doesn't break start_time sorting, no PQ push is necessary.
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if cur_chapter['end_time'] <= c['end_time']:
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cur_chapter['end_time'] = c['start_time']
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append_chapter(cur_chapter)
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cur_i, cur_chapter = i, c
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continue
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# Current chapter contains the cut within it. If the current chapter is
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# a sponsor chapter, check whether the categories before and after the cut differ.
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if '_categories' in cur_chapter:
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after_c = dict(cur_chapter, start_time=c['end_time'], _categories=[])
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cur_cats = []
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for cat_start_end in cur_chapter['_categories']:
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if cat_start_end[1] < c['start_time']:
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cur_cats.append(cat_start_end)
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if cat_start_end[2] > c['end_time']:
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after_c['_categories'].append(cat_start_end)
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cur_chapter['_categories'] = cur_cats
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if cur_chapter['_categories'] != after_c['_categories']:
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# Categories before and after the cut differ: push the after part to PQ.
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heapq.heappush(chapters, (after_c['start_time'], cur_i, after_c))
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cur_chapter['end_time'] = c['start_time']
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append_chapter(cur_chapter)
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cur_i, cur_chapter = i, c
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continue
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# Either sponsor categories before and after the cut are the same or
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# we're dealing with a normal chapter. Just register an outstanding cut:
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# subsequent append_chapter will reduce the duration.
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cur_chapter.setdefault('cut_idx', append_cut(c))
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# (sponsor, normal): if a normal chapter is not completely overlapped,
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# chop the beginning of it and push it to PQ.
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elif '_categories' in cur_chapter and '_categories' not in c:
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if cur_chapter['end_time'] < c['end_time']:
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c['start_time'] = cur_chapter['end_time']
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c['_was_cut'] = True
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heapq.heappush(chapters, (c['start_time'], i, c))
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# (normal, sponsor) and (sponsor, sponsor)
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else:
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assert '_categories' in c
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cur_chapter['_was_cut'] = True
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c['_was_cut'] = True
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# Push the part after the sponsor to PQ.
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if cur_chapter['end_time'] > c['end_time']:
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# deepcopy to make categories in after_c and cur_chapter/c refer to different lists.
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after_c = dict(copy.deepcopy(cur_chapter), start_time=c['end_time'])
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heapq.heappush(chapters, (after_c['start_time'], cur_i, after_c))
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# Push the part after the overlap to PQ.
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elif c['end_time'] > cur_chapter['end_time']:
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after_cur = dict(copy.deepcopy(c), start_time=cur_chapter['end_time'])
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heapq.heappush(chapters, (after_cur['start_time'], cur_i, after_cur))
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c['end_time'] = cur_chapter['end_time']
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# (sponsor, sponsor): merge categories in the overlap.
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if '_categories' in cur_chapter:
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c['_categories'] = cur_chapter['_categories'] + c['_categories']
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# Inherit the cuts that the current chapter has accumulated within it.
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if 'cut_idx' in cur_chapter:
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c['cut_idx'] = cur_chapter['cut_idx']
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cur_chapter['end_time'] = c['start_time']
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append_chapter(cur_chapter)
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cur_i, cur_chapter = i, c
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(append_chapter if 'remove' not in cur_chapter else append_cut)(cur_chapter)
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return self._remove_tiny_rename_sponsors(new_chapters), cuts
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def _remove_tiny_rename_sponsors(self, chapters):
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new_chapters = []
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for i, c in enumerate(chapters):
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# Merge with the previous/next if the chapter is tiny.
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# Only tiny chapters resulting from a cut can be skipped.
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# Chapters that were already tiny in the original list will be preserved.
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if (('_was_cut' in c or '_categories' in c)
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and c['end_time'] - c['start_time'] < _TINY_CHAPTER_DURATION):
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if not new_chapters:
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# Prepend tiny chapter to the next one if possible.
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if i < len(chapters) - 1:
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chapters[i + 1]['start_time'] = c['start_time']
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continue
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else:
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old_c = new_chapters[-1]
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if i < len(chapters) - 1:
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next_c = chapters[i + 1]
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# Not a typo: key names in old_c and next_c are really different.
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prev_is_sponsor = 'categories' in old_c
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next_is_sponsor = '_categories' in next_c
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# Preferentially prepend tiny normals to normals and sponsors to sponsors.
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if (('_categories' not in c and prev_is_sponsor and not next_is_sponsor)
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or ('_categories' in c and not prev_is_sponsor and next_is_sponsor)):
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next_c['start_time'] = c['start_time']
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continue
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old_c['end_time'] = c['end_time']
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continue
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c.pop('_was_cut', None)
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cats = c.pop('_categories', None)
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if cats:
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category = min(cats, key=lambda c: c[2] - c[1])[0]
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cats = orderedSet(x[0] for x in cats)
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c.update({
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'category': category,
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'categories': cats,
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'name': SponsorBlockPP.CATEGORIES[category],
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'category_names': [SponsorBlockPP.CATEGORIES[c] for c in cats]
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})
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outtmpl, tmpl_dict = self._downloader.prepare_outtmpl(self._sponsorblock_chapter_title, c)
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c['title'] = self._downloader.escape_outtmpl(outtmpl) % tmpl_dict
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# Merge identically named sponsors.
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if (new_chapters and 'categories' in new_chapters[-1]
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and new_chapters[-1]['title'] == c['title']):
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new_chapters[-1]['end_time'] = c['end_time']
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continue
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new_chapters.append(c)
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return new_chapters
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def remove_chapters(self, filename, ranges_to_cut, concat_opts, force_keyframes=False):
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in_file = filename
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out_file = prepend_extension(in_file, 'temp')
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if force_keyframes:
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in_file = self.force_keyframes(in_file, (t for c in ranges_to_cut for t in (c['start_time'], c['end_time'])))
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self.to_screen(f'Removing chapters from {filename}')
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self.concat_files([in_file] * len(concat_opts), out_file, concat_opts)
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if in_file != filename:
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os.remove(in_file)
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return out_file
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@staticmethod
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def _make_concat_opts(chapters_to_remove, duration):
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opts = [{}]
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for s in chapters_to_remove:
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# Do not create 0 duration chunk at the beginning.
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if s['start_time'] == 0:
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opts[-1]['inpoint'] = f'{s["end_time"]:.6f}'
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continue
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opts[-1]['outpoint'] = f'{s["start_time"]:.6f}'
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# Do not create 0 duration chunk at the end.
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if s['end_time'] != duration:
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opts.append({'inpoint': f'{s["end_time"]:.6f}'})
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return opts
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