@ -374,21 +374,21 @@ When extracting metadata try to do so from multiple sources. For example if `tit
#### Example
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:
Say `meta` from the previous example has a `title` and you are about to extract it like:
```python
title = meta['title']
title = meta.get('title')
```
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.
If `title` disappears from `meta` in future due to some changes on the hoster's side the title extraction would fail.
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:
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:
```python
title = meta.get('title') or self._og_search_title(webpage)
```
This code will try to extract from `meta` first and if it fails it will try extracting `og:title` from a `webpage`.
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.
@ -148,6 +148,7 @@ Some of yt-dlp's default options are different from that of youtube-dl and youtu
* 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
For ease of use, a few more compat options are available:
* `--compat-options all`: Use all compat options
* `--compat-options youtube-dl`: Same as `--compat-options all,-multistreams`
* `--compat-options youtube-dlc`: Same as `--compat-options all,-no-live-chat,-no-youtube-channel-redirect`
@ -166,7 +167,7 @@ You can simply download the [correct binary file](#release-files) for your OS
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)
@ -485,7 +486,7 @@ You can also fork the project on github and run your fork's [build workflow](.gi
-R, --retries RETRIES Number of retries (default is 10), or
"infinite"
--file-access-retries RETRIES Number of times to retry on file access
error (default is 10), or "infinite"
error (default is 3), or "infinite"
--fragment-retries RETRIES Number of retries for a fragment (default
is 10), or "infinite" (DASH, hlsnative and
ISM)
@ -925,8 +926,8 @@ You can also fork the project on github and run your fork's [build workflow](.gi
same codecs and number of streams to be
concatable. The "pl_video:" prefix can be
used with "--paths" and "--output" to set
the output filename for the split files.
See "OUTPUT TEMPLATE" for details
the output filename for the concatenated
files. See "OUTPUT TEMPLATE" for details
--fixup POLICY Automatically correct known faults of the
file. One of never (do nothing), warn (only
emit a warning), detect_or_warn (the
@ -1065,6 +1066,7 @@ You can configure yt-dlp by placing any supported command line option to a confi
* `~/yt-dlp.conf.txt`
`%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%`
1. **System Configuration**: `/etc/yt-dlp.conf`
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:
@ -1121,6 +1123,7 @@ The simplest usage of `-o` is not to set any template arguments when downloading
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.
The field names themselves (the part inside the parenthesis) can also have some special formatting:
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
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`
@ -1601,7 +1604,9 @@ The general syntax of `--parse-metadata FROM:TO` is to give the name of a field
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`.
This option also has a few special uses:
* 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
* 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.
**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.
@ -1743,19 +1748,72 @@ From a Python program, you can embed yt-dlp in a more powerful fashion, like thi
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).
Here's a more complete example demonstrating various functionality:
**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
info = ydl.extract_info('https://www.youtube.com/watch?v=BaW_jenozKc')
# ℹ️ ydl.sanitize_info makes the info json-serializable
print(json.dumps(ydl.sanitize_info(info)))
ydl.download(URLS)
```
**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
<!-- MANPAGE: MOVE "NEW FEATURES" SECTION HERE -->
# DEPRECATED OPTIONS
@ -1960,8 +2024,7 @@ These options may no longer work as intended
These options were deprecated since 2014 and have now been entirely removed
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)
pukkandan
3 years ago