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[youtube] add storyboards meta field with list and write options

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Storyboards are grids of small images that appear when
the user hovers their cursor over a video's timeline.
See related issue #9868.

Options added:
  * --list-storyboards
  * --write-storyboards

Co-authored by @benob (See: https://github.com/MarcAbonce/youtube-dl/pull/1)
This commit is contained in:
Marc Abonce Seguin
2017-12-09 00:33:28 -06:00
parent 0a04e03a02
commit ec8cc20805
5 changed files with 112 additions and 16 deletions
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youtube_dl/extractor/common.py
+6
View File
@@ -226,6 +226,12 @@ class InfoExtractor(object):
deprecated)
* "filesize" (optional, int)
thumbnail: Full URL to a video thumbnail image.
storyboards: A list of dictionaries representing storyboards.
A storyboard is an image grid made of frames from the video.
This has the same structure as the thumbnails list, plus:
* "cols" (optional, int)
* "rows" (optional, int)
* "frames" (optional, int)
description: Full video description.
uploader: Full name of the video uploader.
license: License name the video is licensed under.
youtube_dl/extractor/youtube.py
+54
View File
@@ -8,6 +8,7 @@ import os.path
import random
import re
import traceback
import math
from .common import InfoExtractor, SearchInfoExtractor
from ..compat import (
@@ -1694,6 +1695,58 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
if thumbnail:
thumbnails = [{'url': thumbnail}]
storyboards = []
sb_spec = try_get(player_response,
lambda x: x['storyboards']['playerStoryboardSpecRenderer']['spec'],
compat_str)
if sb_spec:
s_parts = sb_spec.split('|')
base_url = s_parts[0]
for i, params in enumerate(s_parts[1:]):
storyboard_attrib = params.split('#')
if len(storyboard_attrib) != 8:
self._downloader.report_warning('Unable to extract storyboard')
continue
frame_width = int_or_none(storyboard_attrib[0])
frame_height = int_or_none(storyboard_attrib[1])
total_frames = int_or_none(storyboard_attrib[2])
cols = int_or_none(storyboard_attrib[3])
rows = int_or_none(storyboard_attrib[4])
filename = storyboard_attrib[6]
sigh = storyboard_attrib[7]
if frame_width and frame_height and cols and rows and total_frames:
frames = cols * rows
width, height = frame_width * cols, frame_height * rows
n_images = int(math.ceil(total_frames / float(cols * rows)))
else:
self._downloader.report_warning('Unable to extract storyboard')
continue
storyboards_url = base_url.replace('$L', compat_str(i)) + '&'
for j in range(n_images):
url = storyboards_url.replace('$N', filename).replace('$M', compat_str(j)) + 'sigh=' + sigh
if j == n_images - 1:
remaining_frames = total_frames % (cols * rows)
if remaining_frames != 0:
frames = remaining_frames
rows = int(math.ceil(float(remaining_frames) / rows))
height = rows * frame_height
if rows == 1:
cols = remaining_frames
width = cols * frame_width
storyboards.append({
'id': 'L{0}-M{1}'.format(i, j),
'width': width,
'height': height,
'cols': cols,
'rows': rows,
'frames': frames,
'url': url
})
category = microformat.get('category') or search_meta('genre')
channel_id = video_details.get('channelId') \
or microformat.get('externalChannelId') \
@@ -1733,6 +1786,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
'categories': [category] if category else None,
'tags': keywords,
'is_live': is_live,
'storyboards': storyboards,
}
pctr = try_get(