Impossible d'installer le fichier deb (via l'interface graphique et le terminal également) (Ubuntu 18.04)
Essayer d'installer YouTube To MP3 application sur Ubuntu 18.04 qui fonctionne sur mon Ubuntu 16.04 sans problèmes.
Lorsque je double-clique sur le fichier deb, il exécute GUI installer mais lorsque je clique sur install, il commence à s’installer, puis s’arrête et n’affiche aucune erreur, mais le bouton install est toujours présent. 
J'essaye donc de l'installer manuellement, mais il y a aussi des erreurs. Je vais vous montrer ici mes pas:
milano@milano-PC:~/Downloads$ Sudo dpkg -i youtube-to-mp3-converter3-9-4-64-bit.deb
[Sudo] password for milano:
Selecting previously unselected package youtube-to-mp3.
(Reading database ... 179031 files and directories currently installed.)
Preparing to unpack youtube-to-mp3-converter3-9-4-64-bit.deb ...
Unpacking youtube-to-mp3 (3.8.4) ...
dpkg: dependency problems prevent configuration of youtube-to-mp3:
youtube-to-mp3 depends on libqt4-declarative (>= 4:4.8.1-0ubuntu4.6); however:
Package libqt4-declarative is not installed.
youtube-to-mp3 depends on libav-tools; however:
Package libav-tools is not installed.
dpkg: error processing package youtube-to-mp3 (--install):
dependency problems - leaving unconfigured
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.1) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Errors were encountered while processing:
youtube-to-mp3
Le problème est qu’il n’a pas de dépendances installées:
milano@milano-PC:~/Downloads$ Sudo apt-get install libqt4-declarative
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
libqt4-declarative : Depends: libqt4-network (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqt4-script (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqt4-sql (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqt4-xmlpatterns (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqtgui4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
youtube-to-mp3 : Depends: libav-tools but it is not installable
Recommends: libav-tools-links but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
Moi aussi:
milano@milano-PC:~/Downloads$ Sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages will be REMOVED:
youtube-to-mp3
0 upgraded, 0 newly installed, 1 to remove and 54 not upgraded.
1 not fully installed or removed.
After this operation, 1 434 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 179077 files and directories currently installed.)
Removing youtube-to-mp3 (3.8.4) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.1) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
MODIFIER:
Essayez d'installer à nouveau les dépendances:
milano@milano-PC:~/Downloads$ Sudo apt-get install libqt4-declarative
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
libqt4-declarative : Depends: libqt4-network (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqt4-script (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqt4-sql (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqt4-xmlpatterns (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqtcore4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
Depends: libqtgui4 (= 4:4.8.7+dfsg-7ubuntu1) but it is not going to be installed
youtube-to-mp3 : Depends: libav-tools but it is not installable
Recommends: libav-tools-links but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
Ensuite, lorsque j'essaie d'installer à nouveau l'application, la première étape se répète.
milano@milano-PC:~/Downloads$ Sudo dpkg -i youtube-to-mp3-converter3-9-4-64-bit.deb
Selecting previously unselected package youtube-to-mp3.
(Reading database ... 179031 files and directories currently installed.)
Preparing to unpack youtube-to-mp3-converter3-9-4-64-bit.deb ...
Unpacking youtube-to-mp3 (3.8.4) ...
dpkg: dependency problems prevent configuration of youtube-to-mp3:
youtube-to-mp3 depends on libqt4-declarative (>= 4:4.8.1-0ubuntu4.6); however:
Package libqt4-declarative is not installed.
youtube-to-mp3 depends on libav-tools; however:
Package libav-tools is not installed.
dpkg: error processing package youtube-to-mp3 (--install):
dependency problems - leaving unconfigured
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.1) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Errors were encountered while processing:
youtube-to-mp3
Savez vous ce que vous devez faire?
EDIT
milano@milano-PC:~/Downloads$ Sudo apt install libav-tools
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libav-tools is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
ffmpeg:i386 ffmpeg
E: Package 'libav-tools' has no installation candidate
J'ai testé le fichier deb à partir du site lié - il s'agit de la version 3.9.4 (64 bits) et datée du 04.05.16. Il s’attend donc à travailler sur Ubuntu 16.04 LTS (et non 18.04 LTS).
Vous pouvez obtenir la nouvelle version 3.9.9.5 à partir du référentiel du développeur (MediaHuman) :
Sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7D19F1F3
Sudo add-apt-repository https://www.mediahuman.com/packages/ubuntu
Sudo apt-get update
Sudo apt-get install youtube-to-mp3
Ensuite, vous pouvez l'utiliser:
