package libavcodec-ffmpeg-extra56:amd64 7:2.8.6-1ubuntu2 failed to install/upgrade: package libavcodec-ffmpeg-extra56:amd64 is already installed and configured

[Robert]

tried to install codec pkg.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libavcodec-ffmpeg-extra56:amd64 7:2.8.6-1ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Thu Aug 25 03:26:43 2016
DuplicateSignature:
 package:libavcodec-ffmpeg-extra56:amd64:7:2.8.6-1ubuntu2
 Unpacking oxideqt-codecs:amd64 (1.16.5-0ubuntu0.16.04.1) ...
 dpkg: error processing package libvo-aacenc0:amd64 (--configure):
  package libvo-aacenc0:amd64 is already installed and configured
ErrorMessage: package libavcodec-ffmpeg-extra56:amd64 is already installed and configured
InstallationDate: Installed on 2016-03-27 (150 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: dpkg
Title: package libavcodec-ffmpeg-extra56:amd64 7:2.8.6-1ubuntu2 failed to install/upgrade: package libavcodec-ffmpeg-extra56:amd64 is already installed and configured
UpgradeStatus: Upgraded to xenial on 2016-08-04 (21 days ago)