Fix inside: youtube-dl not working on after some time (or on older release)

[gizmo21]

I'm still on v.1.0.0 (of course classic ;) ) with my box as this is the most stable/fast version for me and nearly has all the features I need. But youtube downloads failed some weeks ago and I now had time to check and a simple sudo apt-get upgrade didn't do the job as youtube-dl came not as apt package but as python pip. I guess especially the youtube-dl service needs some regular updating as yt will change it's site/protocol from time to time, so even on the lastest release-version this could happen if there is no new version is out for some weeks.

My problematic version was:
Found existing installation: youtube-dl 2018.9.8
Which did not display any errors, but just did not download anything to the folder.
Manually check the error by using:
youtube-dl -f bestaudio --extract-audio --audio-format mp3 https://www.youtube.com/watch?v=7GI0VdPehQI

Error: RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

Was fixed with:
Successfully installed youtube-dl-2019.1.10

I would paste the following into the wiki-FAQs if it is OK:

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Fix broken youtube-dl while staying on same RPi-Jukebox-RFID releaseversion

Youtube download could fail after some time (due to site/protocol... changes). There could be no error displayed in webfrontend and the log also does not show an error. To check if the service has a problem just manually run:
youtube-dl -f bestaudio --extract-audio --audio-format mp3 https://www.youtube.com/watch?v=7GI0VdPehQI
If it says update youtube-dl and if you don't want a full phoniebox reinstall or a regular RPi-Jukebox-RFID update to the newest releaseversion here is the way to update youtube-dl only:
sudo pip install --upgrade youtube_dl
This will only upgrade this service and will leave the rest of your install untouched.

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[gizmo21]

As no one answered negativly, I put it here:
https://github.com/MiczFlor/RPi-Jukebox-RFID/wiki/Troubleshooting-FAQ#fix-broken-youtube-dl-while-staying-on-same-rpi-jukebox-rfid-releaseversion

[MiczFlor]

Hi @gizmo21
Here comes my positive answer: I had the same issue, solved it like you and failed to add it to the wiki :) thanks for the contribution!

_{Sent with GitHawk}

[gizmo21]

Had a problem again with a video and updated to 2019-01-17.
And just to document that here, one video was working but another one not.

I wrote a script to do this update from webfrontend. For everyone that use these scripts: http:///userScripts.php:

/home/pi/RPi-Jukebox-RFID/script/userscripts/updateyoutube-dl.sh (Filerights:755)

#!/bin/bash

# From time to time youtube changes it's page/protcols and youtube-dl does not work anymore
# This script just updates the python pip package 'youtube_dl'
# no options in this script
echo '-------updateyoutube-dl.sh -------' >> /home/pi/RPi-Jukebox-RFID/scripts/userscripts/userscript.log
sudo pip install --upgrade youtube_dl >> /home/pi/RPi-Jukebox-RFID/scripts/userscripts/userscript.log