232 lines
8.8 KiB
Markdown
232 lines
8.8 KiB
Markdown
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# YouTube Transcript/Subtitle API (including automatically generated subtitles and subtitle translations)
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[](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=BAENLEW8VUJ6G&source=url)
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[](https://travis-ci.org/jdepoix/youtube-transcript-api)
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[](https://coveralls.io/github/jdepoix/youtube-transcript-api?branch=master)
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[](http://opensource.org/licenses/MIT)
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[](https://pypi.org/project/youtube-transcript-api/)
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[](https://pypi.org/project/youtube-transcript-api/)
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This is an python API which allows you to get the transcripts/subtitles for a given YouTube video. It also works for automatically generated subtitles, supports translating subtitles and it does not require a headless browser, like other selenium based solutions do!
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## Install
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It is recommended to [install this module by using pip](https://pypi.org/project/youtube-transcript-api/):
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```
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pip install youtube_transcript_api
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```
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If you want to use it from source, you'll have to install the dependencies manually:
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```
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pip install -r requirements.txt
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```
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You can either integrate this module [into an existing application](#api), or just use it via an [CLI](#cli).
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## API
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The easiest way to get a transcript for a given video is to execute:
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```python
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from youtube_transcript_api import YouTubeTranscriptApi
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YouTubeTranscriptApi.get_transcript(video_id)
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```
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This will return a list of dictionaries looking somewhat like this:
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```python
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[
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{
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'text': 'Hey there',
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'start': 7.58,
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'duration': 6.13
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},
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{
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'text': 'how are you',
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'start': 14.08,
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'duration': 7.58
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},
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# ...
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]
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```
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You can also add the `languages` param if you want to make sure the transcripts are retrieved in your desired language (it defaults to english).
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```python
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YouTubeTranscriptApi.get_transcripts(video_ids, languages=['de', 'en'])
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```
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It's a list of language codes in a descending priority. In this example it will first try to fetch the german transcript (`'de'`) and then fetch the english transcript (`'en'`) if it fails to do so. If you want to find out which languages are available first, [have a look at `list_transcripts()`](#list-available-transcripts)
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To get transcripts for a list of video ids you can call:
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```python
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YouTubeTranscriptApi.get_transcripts(video_ids, languages=['de', 'en'])
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```
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`languages` also is optional here.
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### List available transcripts
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If you want to list all transcripts which are available for a given video you can call:
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```python
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transcript_list = YouTubeTranscriptApi.list_transcripts(video_id, languages=['de', 'en'])
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```
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This will return a `TranscriptList` object which is iterable and provides methods to filter the list of transcripts for specific languages and types, like:
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```python
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transcript = transcript_list.find_transcript(['de', 'en'])
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```
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By default this module always picks manually created transcripts over automatically created ones, if a transcript in the requested language is available both manually created and generated. The `TranscriptList` allows you to bypass this default behaviour by searching for specific transcript types:
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```python
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# filter for manually created transcripts
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transcript = transcript_list.find_manually_created_transcript(['de', 'en'])
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# or automatically generated ones
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transcript = transcript_list.find_generated_transcript(['de', 'en'])
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```
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The methods `find_generated_transcript`, `find_manually_created_transcript`, `find_generated_transcript` return `Transcript` objects. They contain metadata regarding the transcript:
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```python
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print(
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transcript.video_id,
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transcript.language,
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transcript.language_code,
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# whether it has been manually created or generated by YouTube
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transcript.is_generated,
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# whether this transcript can be translated or not
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transcript.is_translatable,
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# a list of languages the transcript can be translated to
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transcript.translation_languages,
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)
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```
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and provide the method, which allows you to fetch the actual transcript data:
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```python
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transcript.fetch()
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```
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### Translate transcript
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YouTube has a feature which allows you to automatically translate subtitles. This module also makes it possible to access this feature. To do so `Transcript` objects provide a `translate()` method, which returns a new translated `Transcript` object:
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```python
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transcript = transcript_list.find_transcript(['en'])
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translated_transcript = transcript.translate('de')
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print(translated_transcript.fetch())
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```
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### By example
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```python
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# retrieve the available transcripts
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transcript_list = YouTubeTranscriptApi.get('video_id')
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# iterate over all available transcripts
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for transcript in transcript_list:
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# the Transcript object provides metadata properties
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print(
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transcript.video_id,
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transcript.language,
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transcript.language_code,
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# whether it has been manually created or generated by YouTube
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transcript.is_generated,
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# whether this transcript can be translated or not
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transcript.is_translatable,
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# a list of languages the transcript can be translated to
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transcript.translation_languages,
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)
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# fetch the actual transcript data
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print(transcript.fetch())
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# translating the transcript will return another transcript object
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print(transcript.translate('en').fetch())
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# you can also directly filter for the language you are looking for, using the transcript list
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transcript = transcript_list.find_transcript(['de', 'en'])
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# or just filter for manually created transcripts
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transcript = transcript_list.find_manually_created_transcript(['de', 'en'])
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# or automatically generated ones
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transcript = transcript_list.find_generated_transcript(['de', 'en'])
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```
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## CLI
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Execute the CLI script using the video ids as parameters and the results will be printed out to the command line:
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```
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youtube_transcript_api <first_video_id> <second_video_id> ...
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```
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The CLI also gives you the option to provide a list of preferred languages:
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```
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youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en
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```
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You can also specify if you want to exclude automatically generated or manually created subtitles:
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```
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youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en --exclude-generated
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youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en --exclude-manually-created
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```
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If you would prefer to write it into a file or pipe it into another application, you can also output the results as json using the following line:
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```
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youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en --json > transcripts.json
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```
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Translating transcripts using the CLI is also possible:
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```
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youtube_transcript_api <first_video_id> <second_video_id> ... --languages en --translate de
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```
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If you are not sure which languages are available for a given video you can call, to list all available transcripts:
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```
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youtube_transcript_api --list-transcripts <first_video_id>
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```
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## Proxy
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You can specify a https/http proxy, which will be used during the requests to YouTube:
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```python
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from youtube_transcript_api import YouTubeTranscriptApi
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YouTubeTranscriptApi.get_transcript(video_id, proxies={"http": "http://user:pass@domain:port", "https": "https://user:pass@domain:port"})
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```
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As the `proxies` dict is passed on to the `requests.get(...)` call, it follows the [format used by the requests library](http://docs.python-requests.org/en/master/user/advanced/#proxies).
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Using the CLI:
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```
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youtube_transcript_api <first_video_id> <second_video_id> --http-proxy http://user:pass@domain:port --https-proxy https://user:pass@domain:port
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```
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## Warning
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This code uses an undocumented part of the YouTube API, which is called by the YouTube web-client. So there is no guarantee that it won't stop working tomorrow, if they change how things work. I will however do my best to make things working again as soon as possible if that happens. So if it stops working, let me know!
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## Donation
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If this project makes you happy by reducing your development time, you can make me happy by treating me to a cup of coffee :)
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[](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=BAENLEW8VUJ6G&source=url) |