我是 Ubuntu 新手——我使用 ubuntu 14.04 LTS。我尝试使用 ubuntu 视频播放器播放一些视频，需要安装一些插件，但出现了以下错误：
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.
更多详细信息如下：
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
我也尝试安装 VLC 播放器，但再次出现包依赖性错误。
更多详细信息如下：
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
我尝试了很多网上公布的解决方案，但都没有用
我该如何解决这些错误？
更新：以下是etc/apt/sources.list.d
google-chrome.列表 google-chrome.列表.保存
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
抱歉我的语言不好，英语不是我的母语。
答案1
尝试运行以下命令：
sudo apt-get update && sudo apt-get install -f
这将更新你的 repo 缓存，然后修复大多数依赖问题。
如果仍然失败，请尝试运行以下命令，然后立即运行上述命令。
sudo apt-get update && sudo apt-get dist-upgrade
这将更新您的所有软件并确保您运行的是最新版本的 Ubuntu。