GNU bug report logs - #43418
ffprobe/avprobe and ffmpeg/avconv should be added as dependencies of youtube-dl so it will function correctly

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From: Tobias Geerinckx-Rice <me <at> tobias.gr>
To: Nathan Dehnel <ncdehnel <at> gmail.com>
Cc: 43418 <at> debbugs.gnu.org
Subject: bug#43418: ffprobe/avprobe and ffmpeg/avconv should be added as dependencies of youtube-dl so it will function correctly
Date: Tue, 15 Sep 2020 14:06:11 +0200

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Hi Nathan,

Nathan Dehnel 写道：
> bash-5.0$ youtube-dl -x 
> https://www.youtube.com/watch?v=7Ijd_iN9Blk
> [youtube] 7Ijd_iN9Blk: Downloading webpage
> [download] Deadmau5 - Hit Save-7Ijd_iN9Blk.webm has already been 
> downloaded
> [download] 100% of 15.45MiB
> ERROR: ffprobe/avprobe and ffmpeg/avconv not found. Please 
> install one.

It works fine without ‘-x’:

 λ youtube-dl https://www.youtube.com/watch?v=7Ijd_iN9Blk
 [youtube] 7Ijd_iN9Blk: Downloading webpage
 [download] Destination: Deadmau5 - Hit Save-7Ijd_iN9Blk.mp4
 [download] 100% of 37.09MiB in 00:02

This *is* functioning correctly in my view: that advanced options 
optionally require run-time dependencies is not a bug but a 
feature.  The programme clearly explains which package could be 
installed to continue, and the user can chose which one they 
prefer - including neither, which suffices for the majority of 
youtube-dling.

Matters would be different if the error message were less clear, 
or perhaps if ffmpeg weren't so insanely great:

 λ guix size youtube-dl | tail -n1
 total: 186.9 MiB
 λ guix size youtube-dl ffmpeg | tail -n1
 total: 811.2 MiB

(!)

Kind regards,

T G-R

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