Alternative Output format for missing Metadata "NA"

[wolfred24]

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

Description of your issue, suggested solution and other information

Hi, I'm using Youtube-DL for a while and it's amazing, thanks to all of you for your hard work. I explain what is my request:

MY COMMAND
youtube-dl -i --extract-audio --audio-format mp3 --yes-playlist --embed-thumbnail --add-metadata --download-archive "/home/cesar/youtube-dl/downloads.txt" --output "/ home / cesar / youtube-dl /% (artist) s -% (tracking) s.% (ext) s" https://www.youtube.com/playlist?list=PLIB5Es9YVSMyH-euQKtfanO9qTP57Bg9H

CONFLICTIVE AREA:
--output "/ home / cesar / youtube-dl /% (artist) s -% (track) s.% (ext) s"

PROBLEM:
Each time you download a video that does not have metadata of% (track) or% (artist) s, the file is called NA - NA.mp3, so when you download another video without musical metadata, replace the previous file NA - NA .mp3
This problem is caused by the fact that although there are many music videos on YouTube, some do not have musical metadata.

REQUEST:
My request is that you can add a function similar to "if" to validate the -output in case a metadata does not exist in that way that can be replaced by another name, for example, if the name% (track) does not exist then it will be replaced by% (title).

EXAMPLE
--output "if (% track == 'NA') {"% (artist) s -% (track) s.% (ext) s "} else {"% (title) s.% (ext) s " }

[wolfred24]

Someone can tell me where the link of the duplicated post? @dstftw