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wiki/structured/cli.youtube-dl.org
Gabriel Arazas edc686c25c Update wiki on various topics 
This update is too large, I made too many notes on stuff. Nonetheless,
it is very nice to see progress. I've made note revisions on the
following topics:

- Learning
- Writing
- Various Linux-related stuff

I've yet to start learning illustration but I'll be starting tomorrow
for an update how do I keep in mind with those writings. There are still
a lot of things to be processed from the backlog with yet more notes on
learning but I keep having those perspectives whenever I practice so
ehhh... Better have those than nothing?

Furthermore, I've also updated the timestamp format. It is pretty simple
to update all of the notes with a couple of `sed` calls.

Aaaand, I've also changed the way how the assets stored with the folders
only leaving it up for the generated files instead of enforcing it on
every note. I create more visual aids and managing them is a pain for
each note. This restructuring frees me of that burden.
2021-07-20 19:52:43 +08:00

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Command-line: youtube-dl

One of the archivists' best friends. At least you don't have to go to those shady YouTube conversion sites anymore when you have a complete list of other video sites you can download from.

For complete information, you can always inspect youtube-dl.1 manual page.

Synopsis 

youtube-dl [OPTIONS...] [URLS...]

Options

  • --add-metadata adds metadata to the resulting file after download
  • --audio-format [EXTENSION] downloads the video with the select format of "opus", "mp3", "opus", and "vorbis"; but there is also the convenient "best" option
  • --audio-quality [QUALITY] sets the quality of the audio from 0 to 9, best to worst respectively; bitrates are also accepted (e.g., 320K, 1M)
  • -c, --continue resumes the download; useful if the download process is interrupted
  • --config-location [PATH] set the config to be used; useful for local configs with specific options
  • -F, --list-format prints a list of format available for downloading
  • --list-extractors prints a list of supported sites and their specific features.
  • --format [QUALITY] downloads the video with the format shown in --list-format; there are convenient options such as bestaudio and bestvideo referring to the best quality it could find
  • -j, --dump-json completes a dry-run and prints in JSON format
  • -o, --output [STRING] formats the resulting filename of the tracks to be downloaded
  • --no-overwrite throws an error if the file already exists which is handy for scripts
  • --write-sub writes the subtitle file into disk
  • -x, --extract-audio extracts only the audio track

Output formats

For --output option, there are a lot of things to consider naming your files. You may want to automate them yourself but youtube-dl has plenty of options from the get-go.

The following code is the sensible default output string.

%(playlist_index)02d-%(title)s.%(ext)s

A few of the usual stuff I use:

  • title (string) is the title of the track
  • ext (string) is the extension to be used; pretty much recommended to use it

A lot of the things I have to do is to download multiple tracks from an album or playlist. Unfortunately, these are often different from one site to another.

  • playlist_index (number) indicates the position of the track in a playlist. These are usually used from YouTube and Soundcloud playlists.
  • track_number (number) is the position of the track from an album. Usually, these are used from Bandcamp and Vimeo playlists.

Examples

Here is an entryway into your newfound archiving habit. Enjoy! :)

Download the thumbnail and the audio of the video

Very simple. Very useful as most of the thumbnails can go to high resolution and if you need them for some reason.

youtube-dl --write-thumbnail --extract-audio https://www.youtube.com/watch?v=wy9VvdaLuSs

Download an entire album

Though, you should look at the supported sites if it supports downloading an album out of the URL. In this example, we have Bandcamp.

youtube-dl --output '%(track_number)02d-%(title)s.%(ext)s' --format bestaudio https://gametal.bandcamp.com/album/side-quests-vol-3

Specific video download requirements

In this example, I want to download a video with a width of 1080px and the best video and audio at 320Kbit/s. Oh, and the video should be in MP4 and the audio in Opus.

This is will only succeed if the format is available to download which you can do with --list-format.

youtube-dl --format 'bestvideo[width=1080,ext=mp4]+bestaudio[abr=320K,ext=opus]' https://www.youtube.com/watch?v=wy9VvdaLuSs