Fix regular captions

This removes all of the code that was previously used to get them from
/timedtext, and instead, always uses whatever is extracted from the
video page.

This does unfortunately now require a whole video fetch just for the
captions. But assuming captions are only requested by a frontend, this
won't be a problem due to the memory cache. The captions link will be
in memory because the just-requested video is in memory too.
This commit is contained in:
bopol 2021-11-20 08:40:34 +01:00 committed by Cadence Ember
parent 550b633663
commit 66b7d1bec8
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GPG Key ID: BC1C2C61CF521B17
1 changed files with 1 additions and 48 deletions

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@ -6,10 +6,7 @@ from urllib.parse import urlencode
import xml.etree.ElementTree as ET import xml.etree.ElementTree as ET
def extract_captions(id, **kwargs): def extract_captions(id, **kwargs):
if "label" in kwargs and "auto-generated" in kwargs["label"]: captions = extract_captions_from_video(id)
captions = extract_captions_from_video(id)
else:
captions = extract_captions_from_api(id)
return extract_captions_from_dict(captions, **kwargs) return extract_captions_from_dict(captions, **kwargs)
# Return captions for the language specified, # Return captions for the language specified,
@ -26,50 +23,6 @@ def extract_captions_from_dict(captions, *, lang=None, label=None):
return re.sub(r"^([0-9:.]+ --> [0-9:.]+).*$", r"\1", r.content.decode("utf8"), flags=re.MULTILINE) return re.sub(r"^([0-9:.]+ --> [0-9:.]+).*$", r"\1", r.content.decode("utf8"), flags=re.MULTILINE)
return r return r
# List of captions directly from youtube, but no automatic
def extract_captions_from_api(id):
url = "https://video.google.com/timedtext?hl=en&type=list&v={}".format(id)
with requests.get(url) as r:
if r.status_code == 404:
return {
"error": "Video unavailable",
"identifier": "NOT_FOUND"
}
r.raise_for_status()
transcript = ET.fromstring(r.content.decode("utf8"))
tracks = transcript.findall("track")
captions = []
result = {
"captions": captions
}
for track in tracks:
language_code = track.attrib["lang_code"]
label = track.get("name", default=language_code)
subtitle_api_url = get_subtitle_api_url(id, label, language_code)
params = urlencode({
"lang": language_code,
"v": id,
"fmt": "vtt",
"name": label
})
subtitle_url = "https://www.youtube.com/api/timedtext?" + params
captions.append({
"label": label if label != "" else language_code,
"languageCode": language_code,
"url": subtitle_api_url,
"second__remoteUrl": subtitle_url
})
return result
# We'll fall back to this function for auto-captions.
def extract_captions_from_video(id): def extract_captions_from_video(id):
return { return {
"captions": extract_video(id)["captions"] "captions": extract_video(id)["captions"]