package ffmpeg (not installed) failed to install/upgrade: trying to overwrite '/usr/bin/qt-faststart', which is also in package libav-tools 6:9.18-0ubuntu0.14.04.1

[Gary Ferrao]

sudo apt-get install ffmpeg
Reading package lists... Done
Building dependency tree
Reading state information... Done

The following NEW packages will be installed
  ffmpeg
0 to upgrade, 1 to newly install, 0 to remove and 38 not to upgrade.
7 not fully installed or removed.
Need to get 0 B/242 kB of archives.
After this operation, 811 kB of additional disk space will be used.
(Reading database ... 784463 files and directories currently installed.)
Preparing to unpack .../ffmpeg_4%3a0.5.1-1ubuntu1_amd64.deb ...
Unpacking ffmpeg (4:0.5.1-1ubuntu1) ...
dpkg: error processing archive /var/cache/apt/archives/ffmpeg_4%3a0.5.1-1ubuntu1_amd64.deb (--unpack):
 trying to overwrite '/usr/bin/qt-faststart', which is also in package libav-tools 6:9.18-0ubuntu0.14.04.1
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/ffmpeg_4%3a0.5.1-1ubuntu1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Description: Ubuntu 14.04.3 LTS
Release: 14.04

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: ffmpeg (not installed)
ProcVersionSignature: Ubuntu 3.13.0-66.108-generic 3.13.11-ckt27
Uname: Linux 3.13.0-66-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.16
Architecture: amd64
Date: Mon Oct 26 12:23:24 2015
DuplicateSignature: package:ffmpeg:(not installed):trying to overwrite '/usr/bin/qt-faststart', which is also in package libav-tools 6:9.18-0ubuntu0.14.04.1
ErrorMessage: trying to overwrite '/usr/bin/qt-faststart', which is also in package libav-tools 6:9.18-0ubuntu0.14.04.1
InstallationDate: Installed on 2015-01-24 (274 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
SourcePackage: ffmpeg
Title: package ffmpeg (not installed) failed to install/upgrade: trying to overwrite '/usr/bin/qt-faststart', which is also in package libav-tools 6:9.18-0ubuntu0.14.04.1
UpgradeStatus: No upgrade log present (probably fresh install)

[Andreas Cadhalpun (andreas-cadhalpun)]

This is a duplicate of bug #1458359 and just as invalid.