ii gstreamer1.0-clutter-3.0:arm64 3.0.27-2 arm64 Clutter PLugin for GStreamer 1.0
ii gstreamer1.0-gl:arm64 1.18.4-2+deb11u1 arm64 GStreamer plugins for GL
ii gstreamer1.0-gtk3:arm64 1.18.4-2+deb11u2 arm64 GStreamer plugin for GTK+3
ii gstreamer1.0-libav:arm64 1.18.4-3 arm64 ffmpeg plugin for GStreamer
ii gstreamer1.0-nice:arm64 0.1.16-1 arm64 ICE library (GStreamer plugin)
ii gstreamer1.0-packagekit 1.2.5-1~pureos2 arm64 GStreamer plugin to install codecs using PackageKit
ii gstreamer1.0-plugins-bad:arm64 1.18.4-3pureos1 arm64 GStreamer plugins from the "bad" set
ii gstreamer1.0-plugins-base:arm64 1.18.4-2+deb11u1 arm64 GStreamer plugins from the "base" set
ii gstreamer1.0-plugins-good:arm64 1.18.4-2+deb11u2 arm64 GStreamer plugins from the "good" set
ii gstreamer1.0-plugins-ugly:arm64 1.18.4-2 arm64 GStreamer plugins from the "ugly" set
ii gstreamer1.0-x:arm64 1.18.4-2+deb11u1 arm64 GStreamer plugins for X11 and Pango
ii libgstreamer1.0-0:arm64 1.18.4-2.1 arm64 Core GStreamer libraries and elements
I use Clapper to play files that are embedded in websites (in Giara, the Reddit client most of the time), and VLC for anything else (although VLC will happily play embedded video’s too).
At first I tried playing video files off of my sd-card with Clapper, but that did not work for one reason or another.
I do not recall having to install any plugins to make things work.
Only exception to all this: DRM content. That does not play in either (any) app.
Usually I watch videos using Firefox ESR. I already tried all of the Flatpaks from the PureOS Store, but none of them seem to be able to load any common video file container format and codec.
The file info seems normal. Just to check that it’s not about one bad file (from your question it seems like you’ve only tested one file - maybe it’s more): can you play any other kind of videos - like .avi, .mkv or from net (like youtube)? And is this file on the eMMC (/home), SD card, USB-stick or from a network source (wifi, mobile or wired)? If you can test some of those, that would rule out some reasons (like a weird bad file, bad file system/partition/disk, or long download of an online video source).
It’s ok, I think I’m sorted. At least I got lots of useful feedback from you all. Thanks! I’ll use vlc when all else fails, but at least there are quite a few options, and some of them work.