> Suggestion: try to read a mp4 video from the terminal, to grab possible output error
tom@desktop:~$ totem Desktop/VIDEO.mp4 ** Message: Missing plugin: gstreamer|1.0|totem|H.264 (Main Profile) decoder|decoder-video/x-h264, level=(string)3.1, profile=(string)main, max-input-size=(int)64271 (H.264 (Main Profile) decoder) /usr/lib/python3/dist-packages/sessioninstaller/core.py:47: PyGIWarning: Gst was imported without specifying a version first. Use gi.require_version('Gst', '1.0') before import to ensure that the right version gets loaded. from gi.repository import Gst /usr/lib/python3/dist-packages/sessioninstaller/core.py:48: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded. from gi.repository import Gtk Falling back to package information CRITICAL:Could not find any packages to operate on ** Message: No installation candidate for missing plugins found. > dpkg -l | grep libav gstreamer1.0-libav:amd64 1.8.3-1ubuntu0.2 libavahi-client3:amd64 0.6.32~rc+dfsg-1ubuntu2 libavahi-common-data:amd64 0.6.32~rc+dfsg-1ubuntu2 libavahi-common3:amd64 0.6.32~rc+dfsg-1ubuntu2 libavahi-core7:amd64 0.6.32~rc+dfsg-1ubuntu2 libavahi-glib1:amd64 0.6.32~rc+dfsg-1ubuntu2 libavahi-ui-gtk3-0:amd64 0.6.32~rc+dfsg-1ubuntu2 libavc1394-0:amd64 0.5.4-4 libavcodec-ffmpeg-extra56:amd64 7:2.8.11-0ubuntu0.16.04.1 libavdevice-ffmpeg56:amd64 7:2.8.11-0ubuntu0.16.04.1 libavfilter-ffmpeg5:amd64 7:2.8.11-0ubuntu0.16.04.1 libavformat-ffmpeg56:amd64 7:2.8.11-0ubuntu0.16.04.1 libavresample-ffmpeg2:amd64 7:2.8.11-0ubuntu0.16.04.1 libavutil-ffmpeg54:amd64 7:2.8.11-0ubuntu0.16.04.1 > dpkg -l | grep libsodium libsodium18:amd64 1.0.16-0ppa1~xenial1 > debsums libsodium18 /usr/lib/x86_64-linux-gnu/libsodium.so.23.1.0 OK /usr/share/doc/libsodium18/changelog.Debian.gz OK /usr/share/doc/libsodium18/copyright OK > sudo apt install libsodium18 Reading package lists... Done Building dependency tree Reading state information... Done libsodium18 is already the newest version (1.0.16-0ppa1~xenial1). 0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1751769 Title: Some libraries that the gst-libav package relies on are missing. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gst-libav1.0/+bug/1751769/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs