mirror of https://github.com/yt-dlp/yt-dlp.git
[docs] Improve embedding docs and other minor fixes
This commit is contained in:
pukkandan
parent
2e25ce3a05
commit
3d3bb1688b
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@ -374,21 +374,21 @@ When extracting metadata try to do so from multiple sources. For example if `tit
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#### Example
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Say `meta` from the previous example has a `title` and you are about to extract it. Since `title` is a mandatory meta field you should end up with something like:
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Say `meta` from the previous example has a `title` and you are about to extract it like:
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```python
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title = meta['title']
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title = meta.get('title')
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```
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If `title` disappears from `meta` in future due to some changes on the hoster's side the extraction would fail since `title` is mandatory. That's expected.
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If `title` disappears from `meta` in future due to some changes on the hoster's side the title extraction would fail.
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Assume that you have some another source you can extract `title` from, for example `og:title` HTML meta of a `webpage`. In this case you can provide a fallback scenario:
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Assume that you have some another source you can extract `title` from, for example `og:title` HTML meta of a `webpage`. In this case you can provide a fallback like:
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```python
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title = meta.get('title') or self._og_search_title(webpage)
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```
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This code will try to extract from `meta` first and if it fails it will try extracting `og:title` from a `webpage`.
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This code will try to extract from `meta` first and if it fails it will try extracting `og:title` from a `webpage`, making the extractor more robust.
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### Regular expressions
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145
README.md
145
README.md
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@ -148,6 +148,7 @@ Some of yt-dlp's default options are different from that of youtube-dl and youtu
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* youtube-dl tries to remove some superfluous punctuations from filenames. While this can sometimes be helpfull, it is often undesirable. So yt-dlp tries to keep the fields in the filenames as close to their original values as possible. You can use `--compat-options filename-sanitization` to revert to youtube-dl's behavior
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For ease of use, a few more compat options are available:
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* `--compat-options all`: Use all compat options
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* `--compat-options youtube-dl`: Same as `--compat-options all,-multistreams`
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* `--compat-options youtube-dlc`: Same as `--compat-options all,-no-live-chat,-no-youtube-channel-redirect`
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@ -166,7 +167,7 @@ You can simply download the [correct binary file](#release-files) for your OS
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[](https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp)
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[](https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp.tar.gz)
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[](#release-files)
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[](https://github.com/yt-dlp/yt-dlp/releases)
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[](https://github.com/yt-dlp/yt-dlp/releases)
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<!-- MANPAGE: END EXCLUDED SECTION -->
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Note: The manpages, shell completion files etc. are available in the [source tarball](https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp.tar.gz)
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@ -485,7 +486,7 @@ You can also fork the project on github and run your fork's [build workflow](.gi
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-R, --retries RETRIES Number of retries (default is 10), or
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"infinite"
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--file-access-retries RETRIES Number of times to retry on file access
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error (default is 10), or "infinite"
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error (default is 3), or "infinite"
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--fragment-retries RETRIES Number of retries for a fragment (default
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is 10), or "infinite" (DASH, hlsnative and
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ISM)
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@ -925,8 +926,8 @@ You can also fork the project on github and run your fork's [build workflow](.gi
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same codecs and number of streams to be
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concatable. The "pl_video:" prefix can be
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used with "--paths" and "--output" to set
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the output filename for the split files.
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See "OUTPUT TEMPLATE" for details
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the output filename for the concatenated
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files. See "OUTPUT TEMPLATE" for details
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--fixup POLICY Automatically correct known faults of the
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file. One of never (do nothing), warn (only
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emit a warning), detect_or_warn (the
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@ -1065,6 +1066,7 @@ You can configure yt-dlp by placing any supported command line option to a confi
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* `~/yt-dlp.conf.txt`
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`%XDG_CONFIG_HOME%` defaults to `~/.config` if undefined. On windows, `%APPDATA%` generally points to `C:\Users\<user name>\AppData\Roaming` and `~` points to `%HOME%` if present, `%USERPROFILE%` (generally `C:\Users\<user name>`), or `%HOMEDRIVE%%HOMEPATH%`
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1. **System Configuration**: `/etc/yt-dlp.conf`
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For example, with the following configuration file yt-dlp will always extract the audio, not copy the mtime, use a proxy and save all videos under `YouTube` directory in your home directory:
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@ -1121,6 +1123,7 @@ The simplest usage of `-o` is not to set any template arguments when downloading
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It may however also contain special sequences that will be replaced when downloading each video. The special sequences may be formatted according to [Python string formatting operations](https://docs.python.org/3/library/stdtypes.html#printf-style-string-formatting). For example, `%(NAME)s` or `%(NAME)05d`. To clarify, that is a percent symbol followed by a name in parentheses, followed by formatting operations.
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The field names themselves (the part inside the parenthesis) can also have some special formatting:
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1. **Object traversal**: The dictionaries and lists available in metadata can be traversed by using a `.` (dot) separator. You can also do python slicing using `:`. Eg: `%(tags.0)s`, `%(subtitles.en.-1.ext)s`, `%(id.3:7:-1)s`, `%(formats.:.format_id)s`. `%()s` refers to the entire infodict. Note that all the fields that become available using this method are not listed below. Use `-j` to see such fields
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1. **Addition**: Addition and subtraction of numeric fields can be done using `+` and `-` respectively. Eg: `%(playlist_index+10)03d`, `%(n_entries+1-playlist_index)d`
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@ -1601,7 +1604,9 @@ The general syntax of `--parse-metadata FROM:TO` is to give the name of a field
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Note that any field created by this can be used in the [output template](#output-template) and will also affect the media file's metadata added when using `--add-metadata`.
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This option also has a few special uses:
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* You can download an additional URL based on the metadata of the currently downloaded video. To do this, set the field `additional_urls` to the URL that you want to download. Eg: `--parse-metadata "description:(?P<additional_urls>https?://www\.vimeo\.com/\d+)` will download the first vimeo video found in the description
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* You can use this to change the metadata that is embedded in the media file. To do this, set the value of the corresponding field with a `meta_` prefix. For example, any value you set to `meta_description` field will be added to the `description` field in the file. For example, you can use this to set a different "description" and "synopsis". To modify the metadata of individual streams, use the `meta<n>_` prefix (Eg: `meta1_language`). Any value set to the `meta_` field will overwrite all default values.
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**Note**: Metadata modification happens before format selection, post-extraction and other post-processing operations. Some fields may be added or changed during these steps, overriding your changes.
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@ -1743,19 +1748,72 @@ From a Python program, you can embed yt-dlp in a more powerful fashion, like thi
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```python
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from yt_dlp import YoutubeDL
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ydl_opts = {'format': 'bestaudio'}
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with YoutubeDL(ydl_opts) as ydl:
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ydl.download(['https://www.youtube.com/watch?v=BaW_jenozKc'])
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URLS = ['https://www.youtube.com/watch?v=BaW_jenozKc']
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with YoutubeDL() as ydl:
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ydl.download(URLS)
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```
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Most likely, you'll want to use various options. For a list of options available, have a look at [`yt_dlp/YoutubeDL.py`](yt_dlp/YoutubeDL.py#L181).
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Here's a more complete example demonstrating various functionality:
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**Tip**: If you are porting your code from youtube-dl to yt-dlp, one important point to look out for is that we do not guarantee the return value of `YoutubeDL.extract_info` to be json serializable, or even be a dictionary. It will be dictionary-like, but if you want to ensure it is a serializable dictionary, pass it through `YoutubeDL.sanitize_info` as shown in the example above
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## Embedding examples
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### Extracting information
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```python
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import json
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import yt_dlp
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URL = 'https://www.youtube.com/watch?v=BaW_jenozKc'
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# ℹ️ See help(yt_dlp.YoutubeDL) for a list of available options and public functions
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ydl_opts = {}
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with yt_dlp.YoutubeDL(ydl_opts) as ydl:
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info = ydl.extract_info(URL, download=False)
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# ℹ️ ydl.sanitize_info makes the info json-serializable
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print(json.dumps(ydl.sanitize_info(info)))
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```
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### Download from info-json
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```python
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import yt_dlp
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INFO_FILE = 'path/to/video.info.json'
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with yt_dlp.YoutubeDL() as ydl:
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error_code = ydl.download_with_info_file(INFO_FILE)
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print('Some videos failed to download' if error_code
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else 'All videos successfully downloaded')
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```
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### Extract audio
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```python
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import yt_dlp
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URLS = ['https://www.youtube.com/watch?v=BaW_jenozKc']
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ydl_opts = {
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'format': 'm4a/bestaudio/best'
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# ℹ️ See help(yt_dlp.postprocessor) for a list of available Postprocessors and their arguments
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'postprocessors': [{ # Extract audio using ffmpeg
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'key': 'FFmpegExtractAudio',
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'preferredcodec': 'm4a',
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}]
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}
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with yt_dlp.YoutubeDL(ydl_opts) as ydl:
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error_code = ydl.download(URLS)
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```
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### Adding logger and progress hook
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```python
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import yt_dlp
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URLS = ['https://www.youtube.com/watch?v=BaW_jenozKc']
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class MyLogger:
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def debug(self, msg):
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@ -1776,23 +1834,51 @@ class MyLogger:
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print(msg)
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# ℹ️ See the docstring of yt_dlp.postprocessor.common.PostProcessor
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# ℹ️ See "progress_hooks" in help(yt_dlp.YoutubeDL)
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def my_hook(d):
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if d['status'] == 'finished':
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print('Done downloading, now post-processing ...')
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ydl_opts = {
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'logger': MyLogger(),
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'progress_hooks': [my_hook],
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}
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with yt_dlp.YoutubeDL(ydl_opts) as ydl:
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ydl.download(URLS)
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```
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### Add a custom PostProcessor
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```python
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import yt_dlp
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URLS = ['https://www.youtube.com/watch?v=BaW_jenozKc']
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# ℹ️ See help(yt_dlp.postprocessor.PostProcessor)
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class MyCustomPP(yt_dlp.postprocessor.PostProcessor):
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# ℹ️ See docstring of yt_dlp.postprocessor.common.PostProcessor.run
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def run(self, info):
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self.to_screen('Doing stuff')
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return [], info
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# ℹ️ See "progress_hooks" in the docstring of yt_dlp.YoutubeDL
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def my_hook(d):
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if d['status'] == 'finished':
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print('Done downloading, now converting ...')
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with yt_dlp.YoutubeDL() as ydl:
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ydl.add_post_processor(MyCustomPP())
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ydl.download(URLS)
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```
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### Use a custom format selector
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```python
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import yt_dlp
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URL = ['https://www.youtube.com/watch?v=BaW_jenozKc']
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def format_selector(ctx):
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""" Select the best video and the best audio that won't result in an mkv.
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This is just an example and does not handle all cases """
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NOTE: This is just an example and does not handle all cases """
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# formats are already sorted worst to best
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formats = ctx.get('formats')[::-1]
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@ -1807,8 +1893,8 @@ def format_selector(ctx):
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best_audio = next(f for f in formats if (
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f['acodec'] != 'none' and f['vcodec'] == 'none' and f['ext'] == audio_ext))
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yield {
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# These are the minimum required fields for a merged format
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yield {
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'format_id': f'{best_video["format_id"]}+{best_audio["format_id"]}',
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'ext': best_video['ext'],
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'requested_formats': [best_video, best_audio],
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@ -1817,36 +1903,14 @@ def format_selector(ctx):
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}
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# ℹ️ See docstring of yt_dlp.YoutubeDL for a description of the options
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ydl_opts = {
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'format': format_selector,
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'postprocessors': [{
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# Embed metadata in video using ffmpeg.
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# ℹ️ See yt_dlp.postprocessor.FFmpegMetadataPP for the arguments it accepts
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'key': 'FFmpegMetadata',
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'add_chapters': True,
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'add_metadata': True,
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}],
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'logger': MyLogger(),
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'progress_hooks': [my_hook],
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# Add custom headers
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'http_headers': {'Referer': 'https://www.google.com'}
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}
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# ℹ️ See the public functions in yt_dlp.YoutubeDL for for other available functions.
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# Eg: "ydl.download", "ydl.download_with_info_file"
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with yt_dlp.YoutubeDL(ydl_opts) as ydl:
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ydl.add_post_processor(MyCustomPP())
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info = ydl.extract_info('https://www.youtube.com/watch?v=BaW_jenozKc')
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# ℹ️ ydl.sanitize_info makes the info json-serializable
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print(json.dumps(ydl.sanitize_info(info)))
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ydl.download(URLS)
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```
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**Tip**: If you are porting your code from youtube-dl to yt-dlp, one important point to look out for is that we do not guarantee the return value of `YoutubeDL.extract_info` to be json serializable, or even be a dictionary. It will be dictionary-like, but if you want to ensure it is a serializable dictionary, pass it through `YoutubeDL.sanitize_info` as shown in the example above
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<!-- MANPAGE: MOVE "NEW FEATURES" SECTION HERE -->
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# DEPRECATED OPTIONS
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@ -1960,8 +2024,7 @@ These options may no longer work as intended
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These options were deprecated since 2014 and have now been entirely removed
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-A, --auto-number -o "%(autonumber)s-%(id)s.%(ext)s"
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-t, --title -o "%(title)s-%(id)s.%(ext)s"
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-l, --literal -o accepts literal names
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-t, -l, --title, --literal -o "%(title)s-%(id)s.%(ext)s"
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# CONTRIBUTING
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See [CONTRIBUTING.md](CONTRIBUTING.md#contributing-to-yt-dlp) for instructions on [Opening an Issue](CONTRIBUTING.md#opening-an-issue) and [Contributing code to the project](CONTRIBUTING.md#developer-instructions)
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@ -397,7 +397,8 @@ def validate_options(opts):
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# Conflicting options
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report_conflict('--dateafter', 'dateafter', '--date', 'date', default=None)
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report_conflict('--datebefore', 'datebefore', '--date', 'date', default=None)
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report_conflict('--exec-before-download', 'exec_before_dl_cmd', '"--exec before_dl:"', 'exec_cmd', opts.exec_cmd.get('before_dl'))
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report_conflict('--exec-before-download', 'exec_before_dl_cmd',
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'"--exec before_dl:"', 'exec_cmd', val2=opts.exec_cmd.get('before_dl'))
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report_conflict('--id', 'useid', '--output', 'outtmpl', val2=opts.outtmpl.get('default'))
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report_conflict('--remux-video', 'remuxvideo', '--recode-video', 'recodevideo')
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report_conflict('--sponskrub', 'sponskrub', '--remove-chapters', 'remove_chapters')
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@ -412,7 +413,7 @@ def validate_options(opts):
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report_conflict('--embed-subs', 'embedsubtitles')
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report_conflict('--embed-thumbnail', 'embedthumbnail')
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report_conflict('--extract-audio', 'extractaudio')
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report_conflict('--fixup', 'fixup', val1=(opts.fixup or '').lower() in ('', 'never', 'ignore'), default='never')
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report_conflict('--fixup', 'fixup', val1=opts.fixup not in (None, 'never', 'ignore'), default='never')
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report_conflict('--recode-video', 'recodevideo')
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report_conflict('--remove-chapters', 'remove_chapters', default=[])
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report_conflict('--remux-video', 'remuxvideo')
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@ -105,6 +105,7 @@ class KakaoIE(InfoExtractor):
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resp = self._parse_json(e.cause.read().decode(), video_id)
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if resp.get('code') == 'GeoBlocked':
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self.raise_geo_restricted()
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raise
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fmt_url = traverse_obj(fmt_url_json, ('videoLocation', 'url'))
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if not fmt_url:
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@ -83,7 +83,8 @@ class PostProcessor(metaclass=PostProcessorMetaClass):
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write_string(f'DeprecationWarning: {text}')
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def report_error(self, text, *args, **kwargs):
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# Exists only for compatibility. Do not use
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self.deprecation_warning('"yt_dlp.postprocessor.PostProcessor.report_error" is deprecated. '
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'raise "yt_dlp.utils.PostProcessingError" instead')
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if self._downloader:
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return self._downloader.report_error(text, *args, **kwargs)
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