libavcodec57 and libavcodec-extra57 are conflicting with each other, you'll need to purge one of them:
dpkg: regarding .../035-libavcodec-extra57_7%3a3.2.4-1build2_amd64.deb containing libavcodec-extra57:amd64: libavcodec-extra57 conflicts with libavcodec57 libavcodec57:amd64 (version 7:3.2.4-1build2) is present and installed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1711974 Title: package libavcodec-extra57 (not installed) failed to install/upgrade: conflicting packages - not installing libavcodec-extra57:amd64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1711974/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
