In category: ← Automation

About ydl_api_ng

Simple youtube-dl REST API to launch downloads on a distant server.

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Languages/Platforms/Technologies:

Python

Lincenses:

GPL-3.0

More about ydl_api_ng

ydl_api_ng

ydl_api_ng is the new version of ydl_api

But why ?

ydl_api was built to fulfill my needs, and it works really well for me. However, it has a few drawbacks :

limited to a few parameters
complexity to add new parameters in the api
Not suitable for advanced youtube-dl users

Differences with ydl_api ?

A huge portion of the codebase has been rewritten
A new system of parameter file
More powerful : you can now add any youtube-dlp option to enhance your downloads
Better maintainability : no need new devs on this application if youtube-dlp adds new options
Suitable for advanced youtube-dlp users
Not complicated for basic users
New features are planned
(Optional) Use redis for a better queue management

Installation

With docker

Container on Docker Hub here

The parameters files are generated in the params volume on the first launch of the container.

Volumes mapping

Volumes you could want to map :

/app/downloads/ : where files will be downloaded
/app/params/ : where the parameters files will be stored
/app/params/hooks_utils/ : if you need to import your own python scripts for the hooks handlers
/app/logs

Ports

The internal port of the api is 80

Docker-compose

Just copy the docker-compose.yml file where you want and launch this command :

docker-compose pull # pull the latest image
docker-compose up # to start the container
docker-compose down # to stop the container

Force yt-dlp version:

Add the version of yt-dlp you want in docker environment :

FORCE_YTDLP_VERSION=2022.11.11

By command line

docker run -p 5011:80 totonyus/ydl_api_ng # don't forget to map the folders

Note : the standard image comes with redis enabled. Please view on the queue management documentation to know how to disable it.

You can also find the docker-compose.yml file.

UID and GID

The default user used in the container is 1000:1000. You can edit those by changing the environment vars UID and GID in the docker-compose.yml or in the docker run command.

The user must be root (UID=0 ans GID=0) or match the owner of the download repository.

To know your UID and GID, simple run this command with the right user or check your /etc/passwd file.

echo $UID $GID

Without Docker

Requirements

Installation with distribution package manager (apt, yum, ...) : python3, python3-pip, ffmpeg

pip3 install -r pip_requirements

Download this repo

Download the latest release :

wget https://github.com/Totonyus/ydl_api_ng/archive/master.zip

Then unzip the file and rename the unzipped folder : (note you can use unzip -d %your_path% to specify where you want to unzip the file )

unzip master.zip; mv ydl_api_ng-master ydl_api_ng

Modify listening port

The api listen by default on the port 80. It's perfect for docker use but not really a good idea for a bare metal user. Set the port you want in the params.ini file.

Install as daemon

Just fill the ydl_api_ng.service file and move it in /usr/lib/systemd/system/ for systemd linux.

mv ydl_api.service /usr/lib/systemd/system/

You can change the name of the service by changing the name of the file.

then (you must run this command every time you change the service file)

systemctl daemon-reload

Commands :

systemctl start ydl_api_ng
systemctl stop ydl_api_ng
systemctl enable ydl_api_ng # start at boot
systemctl disable ydl_api_ng # don't start at boot

Install the userscript

Install Greasemonkey (firefox) or Tampermonkey (chrome) and add a new userscript. Then copy the content of userscript.js in the interface and save.

Then change the default host set in the script. You can also customize all the presets to match the configuration file of your server.

You now should have access to download options on every site. You can also modify the match options to limit the usages.

Userscript in action

Files you'll probably want to consult or customize

These files are generated in params/

params.ini all the default parameters of the application, everything is set up to offer you a working application out of the box
params_metadata.ini describe how each parameter in params.ini should be interpreted
userscript.js a javascript file you can import in Greasemonkey (firefox) or Tampermonkey (chrome) to access the api from yout browser
progress_hooks.py youtube-dl progress hooks handler method
postprocessor_hooks.py youtube-dl postprocessor hooks handler method
ydl_api_hooks.py api hooks handler methods, only called at few moments
hooks_requirements the extra requirements you need to fully use the hooks

There files are in the base folder :

docker-compose.yml to configure easily the container
ydl_api_ng.service a systemd service file to launch this application as a daemon

Updating youtube-dlp

Docker

Simply reload the container, an update is performed at launch

Without docker

pip3 install yt_dlp --upgrade

Configuration details

parameters_metadata.ini

Each parameter in the params.ini file is a string. The parameters_metadata.ini file is used to describe how each parameter must be cast.

As I don't know any option of youtuble-dlp, I tried my best to arrange the fields correctly but some are probably wrong.

Please don't hesitate to make a merge request or to open a ticket on this repo to ask the correction.

You can also add your own parameters fields if you need it.

params.sample.ini

This file is a complete working configuration file who is fully documented to help you to understand how it works.

User management

If the user management is activated (disabled by default), each request must have the &token query parameter. You can override some parameters for a specific user.

Site management

You can define parameters for given websites. It's useful to avoid long-running playlist download simulation.

# Every host matching this site
_hosts = www.youtube.com,youtu.be
# How to define the url is a video 
_video_indicators = /watch?
# How to define the url is a playlist
_playlist_indicators = ?list=,&list=,/user/,/playlists

You can also add parameters tied to the site like login information

Queue management

A new system of queue management has been build to have a better view of current, past and future downloads.

You can choose the number of workers in the docker-compose file : NB_WORKERS=5 (environment parameter). The number of workers determines the number of parallel downloads.

Without docker

You can perfectly run ydl_api_ng with redis without docker. However, to keep it simple for basic users, the option is disabled by default in the params.ini file :

_enable_redis = true # (false is not in parameter file)
_redis_host = localhost
_redis_port = 6379

The application will run downloads without redis and the old queue management system will be used for the api /active_downloads and /terminate

With docker

If you don't want to use redis with docker, you can remove the corresponding block in the docker-compose file : ydl_api_ng_redis.

You must disable redis in the params.ini file : _enable_redis = false

You can also pass the DISABLE_REDIS environment parameter in the docker-compose file to avoid workers launching.

Programmation

A new feature allow you to schedule ydl_dlp executions. This feature needs redis.

Three usecases: - Continuously download a livestream when it's available - Archive a channel at given hours - Schedule a download at a precise date for a precise duration

Representation

Here what a programmation object looks like in database :

{
"id": "string (generated)",
"url": "string",
"user_token": "string (null)",
"enabled": "bool (true)",
"planning": {
    "recording_start_date": "string date : YYYY-MM-DD hh:mm (null)",
    "recording_duration": "int > 0 (null)",
    "recording_stops_at_end": "bool (false)",
    "recording_restarts_during_duration" : "bool (true)",

    "recurrence_cron": "string (null)",
    "recurrence_start_date": "string date : YYYY-MM-DD hh:mm (null)",
    "recurrence_end_date": "string date : YYYY-MM-DD hh:mm (null)"
    },
"presets": ["string"]
}

Fields: - id : generated by the api - url : url to download, it will not be checked - user_token : unused if the _allow_programmation is not explicitly set at true in the user config - enabled : if false, the programmation will be ignored - recording_start_date - recording_duration : how many minutes recording is supposed to long - recording_stops_at_end : if true, the download will be force stopped when recording_duration is reached - recording_restarts_during_duration : if False, the download will not be restarted if stopped before recording_duration - recurrence_cron : same cron as linux - recurrence_start_date : useful only if recurrence_cron is used - recurrence_end_date : useful only if recurrence_cron is used - presets : list of presets names

Notes: - recording_start_date and recurrence_cron cannot be used at the same type - if recording_duration is set, the download will be relaunched automatically if stopped during the interval

Reliability

The launch hours are not perfectly exact and have an error range of -1 minute

Examples of minimal configurations

Continuous download

{
"url": "string"
}

Archiving execution

{
"url": "string",
"planning": {
    "recurrence_cron": "00 01 * * *"
    }
}

Special program

Every day in december from 13:00 to 14:00

{
"url": "string",
"planning": {
    "recording_duration": 60,
    "recording_stops_at_end": true,

    "recurrence_cron": "00 13 * * *",
    "recurrence_start_date": "2022-12-01 00:00",
    "recurrence_end_date": "2022-12-31 23:00"
    }
}

One time special program

Will last at least 4 hours

{
  "url": "string",
  "planning": {
    "recording_start_date" : "2022-12-31 22:00",
    "recording_duration": 240
  }
}

API

Application information

Return the application complete parameters

GET http://localhost:5011/info

Responses status

401 : User is not permitted

Downloads

Only the url is required to use the api.

# Simplest case, uses the DEFAULT preset
GET http://localhost:5011/download?url=https://www.youtube.com/watch?v=9Lgc3TxqgHA

# You can download multiple presets at once, if no preset is valid, will download with DEFAULT preset, if at least one preset is valid, will download only valid presets
GET http://localhost:5011/download?url=https://www.youtube.com/watch?v=Kf1XttuuIiQ&presets=audio,hd

# If the user management is enabled
GET http://localhost:5011/download?url=https://www.youtube.com/watch?v=wV4wepiucf4&token=dad_super_password

Post request

You can download the video you want by providing the parameters directly in a post request

POST http://localhost:5011/download?url=https://www.youtube.com/watch?v=wV4wepiucf4&token=dad_super_password
Content-Type: application/json

{
  "presets": [
    {
      "_ignore_site_config": false, # (optional, default : false) if true, will not load parameters from site detection
      "_ignore_default_preset": false, # (optional, default : false) if true, will not expand default preset
      # You can expand parameters
      "_preset" : "AUDIO"
      "_location" : "AUDIO"
      # just put below your standard youtube-dlp options
      "format" : "best[height=360]/bestvideo[height=360]+bestaudio/best"
    }
  ]
}

It is possible to add a timer to stop the download (recording_stops_at_end will be automatically set on True) :

POST http://localhost:5011/download?url=https://www.youtube.com/watch?v=wV4wepiucf4&token=dad_super_password
Content-Type: application/json

{
  "programmation": {
    "planning": {
      "recording_duration": 10
    }
  },
  "presets": [
    {
      "_preset": "HD"
    }
  ]
}

Reminder if you want to expand a preset : all presets automatically expand the DEFAULT preset. Basically, expand a preset with _preset means _ignore_default_presetcan't be true.

Important notice

As the post request can be dangerous by allowing to write anywhere on your system (if not running in docker) a parameter _allow_dangerous_post_requests (false by default) has been added.

For each preset if _allow_dangerous_post_requests is false :

paths will be deleted and replaced by the default location parameter
outtmpl will be deleted and replaced by the default template parameter
You still can select a paths or a outtmpl by using expansion system
You can only use paths and outtmpl present in params.ini

Video information

Returns the standard youtube-dlp extract info object.

GET http://localhost:5011/extract_info?url=https://www.youtube.com/watch?v=9Lgc3TxqgHA

Responses status

401 : User is not permitted

Process management

The process management system only works on livestreams

Global

# Get all active downloads (with PID)
GET http://localhost:5011/active_downloads

# Stop all active downloads
GET http://localhost:5011/active_downloads/terminate

# Stop the active download with it PID. It uses se system PID, this feature is safe, a non-child process cannot be killed
# If using redis, also permit to cancel pending job
# If job is finished or canceled, will delete from queue
GET http://localhost:5011/active_downloads/terminate/{pid}

Redis only

# Get all registries content
GET http://localhost:5011/queue

# Get registry content (all, workers, pending_job, started_job, finished_job, failed_job, deferred_job, scheduled_job, canceled_job)
GET http://localhost:5011/queue/finished_job

# Delete all jobs but pending and started jobs
DELETE http://localhost:5011/queue

Programmation

# Get programmations in database
GET {{host}}/programmation?token=user_token

# Add a new programmation
POST {{host}}/programmation?url=an_added_url&token=user_token

{
  "planning": {
    "recording_duration": 60,
    "recurrence_cron": "00 12 * * *"
  }
} 

# Update a programmation
PUT {{host}}/programmation/<id>

{
  "planning": {
    "recurrence_end_date" : "2022-12-31 00:00"
  }
}

# Delete a programmation by ID
DELETE {{host}}/programmation/<ID>

# Delete all programmations for the URL
DELETE {{host}}/programmation?url=url

Responses status

401 : User is not permitted

iOS shortcut

There is now an iOS shortcut you can find here.

If the shortcut is launched outside the share interface, it uses the content of the clipboard.

Shortcut configuration

host : download url (with endpoint)
token : the user token
preset_selection : if true, asks the preset to use. If false, use the default preset
presets : a map with all the presets 
default_preset : the default preset if preset_selection is false

Contributing

Found a bug ? Need an improvement ? Need help ? Open a ticket !
Found a typo in documentation ? That's normal ! I'm French. Don't hesitate to contact me if you don't understand a sentence or if there are mistakes.