youtube-dl:tldr:605e0
The command "youtube-dl -x --audio-format ${mp3} '${url}'" is used to download audio from a YouTube video and save it in the MP3 format using the YouTube-DL tool.
Let's break down each part of the command:
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"youtube-dl": This is the name of the command-line tool we are using. It is designed to download videos and audios from various websites, including YouTube.
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"-x": This is an option flag that specifies we want to extract audio from the downloaded video file.
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"--audio-format ${mp3}": This option flag tells YouTube-DL to convert the extracted audio to the MP3 format. The "${mp3}" signifies that the value of the audio format is a variable named "mp3".
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"'${url}'": This is the URL of the YouTube video you want to download. It should be enclosed in single quotes to ensure that any special characters in the URL are treated correctly by the command.
When you execute this command, YouTube-DL will download the video from the specified URL, extract the audio, convert it to MP3 format, and save it to your local machine.