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I'm newbie with Ubuntu -- I use ubuntu 14.04 LTS. I was trying to play some video using ubuntu video player and it required installing some plugins but this error occurred:

Package dependencies cannot be resolved

This error could be caused by required additional software packages
which are missing or not installable. Furthermore there could be a
conflict between software packages which are not allowed to be
installed at the same time.

and here more details:

The following packages have unmet dependencies:    
gstreamer1.0-libav: Depends: libavcodec-extra-54 (>= 6:9.13) but
6:9.18-0ubuntu0.14.04.1 is to be installed    
             Depends: libavformat54 (>= 6:9.1-1) but 6:9.18-0ubuntu0.14.04.1 is to be installed
             Depends: libavutil52 (>= 6:9.1-1) but 6:9.18-0ubuntu0.14.04.1 is to be installed
             Depends: libc6 (>= 2.14) but 2.19-0ubuntu6.6 is to be installed
             Depends: libglib2.0-0 (>= 2.37.3) but 2.40.2-0ubuntu1 is to be installed

I tried also to install VLC player and the package dependencies errors occurred again.

and here more details:

The following packages have unmet dependencies:
vlc: Depends: vlc-nox (= 2.1.6-0ubuntu14.04.1) but
2.1.6-0ubuntu14.04.1 is to be installed
      Depends: libc6 (>= 2.15) but 2.19-0ubuntu6.6 is to be installed
      Depends: libfreetype6 (>= 2.2.1) but 2.5.2-1ubuntu2.4 is to be installed
      Depends: libgcc1 (>= 1:4.1.1) but 1:5.1.0-0ubuntu11~14.04.1 is to be installed
      Depends: libqtcore4 (>= 4:4.8.0) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1 is to be installed
      Depends: libqtgui4 (>= 4:4.8.0) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1 is to be installed
      Depends: libstdc++6 (>= 4.6) but 5.1.0-0ubuntu11~14.04.1 is to be installed
      Depends: zlib1g (>= 1:1.2.3.3) but 1:1.2.8.dfsg-1ubuntu1 is to be installed

I tried a lot of solutions published on the internet but they didn't work

how can I solve these errors?

UPD: here's the content of the etc/apt/sources.list.d

google-chrome.list google-chrome.list.save

ubuntu-toolchain-r-test-trusty.list

ubuntu-toolchain-r-test-trusty.list.save

webupd8team-sublime-text-2-trusty.list

webupd8team-sublime-text-2-trusty.list.save

sorry of my bad language, English isn't my native..

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Mahmoud Sayed
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  • How did you install VLC-player ? (which command line, or which method ?) – green frog Jul 18 '15 at 18:04
  • I used ubuntu software center. – Mahmoud Sayed Jul 18 '15 at 18:06
  • using terminal can you test :`sudo apt-get install vlc` ? – green frog Jul 18 '15 at 18:08
  • It said that "I have some broken packages" – Mahmoud Sayed Jul 18 '15 at 18:10
  • to install vlc run `sudo apt-get remove --purge vlc vlc-nox vlc-data` then `sudo apt-get install vlc` – JoKeR Jul 18 '15 at 18:53
  • what's the output for `uname -r` ? – JoKeR Jul 18 '15 at 18:55
  • @JoKeR, the same problem still exists. – Mahmoud Sayed Jul 18 '15 at 18:56
  • here's it: 3.13.0-57-generic – Mahmoud Sayed Jul 18 '15 at 18:58
  • it means you have got duplicated sources... if you fix it it won't appear anymore to fix it you have to disable those repositories that make conflict as told in a link above... try also `sudo apt-get update && sudo apt-get upgrade --with-new-pkgs` – JoKeR Jul 18 '15 at 18:59
  • are those all the sources you got in */etc/apt/sources* ? you can list it with `ls /etc/apt/sources.list.d/*` also main `sudo apt edit-sources` – JoKeR Jul 18 '15 at 19:07
  • could you please edit your answer by adding the content of `/etc/apt/sources.list` (this is the list of the repository then check if this file is update. (for example in france, my local list can be found [here](http://doc.ubuntu-fr.org/depots_trusty)) **Update** Ok then, make a backup of your source.list and generate new list from [source list generator](http://repogen.simplylinux.ch/) and just add the lines into the source.list file – green frog Jul 18 '15 at 18:18
  • yes those are all sources I have. what should I choose after 'sudo apt edit-sources' – Mahmoud Sayed Jul 18 '15 at 19:25

1 Answers1

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Try running the following command:

sudo apt-get update && sudo apt-get install -f

This will update your repo cache and then will fix most dependency issues.

If this still fails, please try running the below command and then running the above command immediately after.

sudo apt-get update && sudo apt-get dist-upgrade

This will update all of your software and ensure that you're running on the latest version of Ubuntu.

Kaz Wolfe
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  • !!! I would not run `sudo apt-get dist-upgrade`!!! Won't that upgrade him from Ubuntu 14.04 LTS to Ubuntu 15.04 (not LTS!) – Michael Butler Jul 18 '15 at 20:00
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    @MichaelButler IIRC, `dist-upgrade` does not change your distribution, but it will solve package conflicts. See [here](http://askubuntu.com/questions/81585/what-is-dist-upgrade-and-why-does-it-upgrade-more-than-upgrade) for more info. – Kaz Wolfe Jul 18 '15 at 20:02
  • Seriously, why can't we downvote comments. – mchid Jun 03 '16 at 08:59