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How to Install LibreOffice 7.2 in Ubuntu 20.04, Ubuntu 21.10

Last updated: December 25, 2021

The LibreOffice office suite 7.2 was released with many new features and improvements. Here’s how to install it in Ubuntu 20.04, Ubuntu 21.04, and Ubuntu 21.10.

LibreOffice is the default office suite available in Ubuntu as well as many other Linux Distributions out-of-the-box. It’s made up of a Writer, Calc, Impress, Draw, Math, and database management tools, and supports the file formats of MicroSoft Office.

What’s new in Libreoffice 7.2

LibreOffice 7.2 was released as the latest major release with new command popup HUD (“Heads-up display”). By going to “Help -> Search Commands” or pressing Shift+Esc on keyboard, it brings up the command box allows to search for and execute actions.

The release introduced a Dark color scheme, so the app window can be set to fully dark for working at night. Also, it added new scrollable style picker in Notebookbar, fontwork panel in sidebar. And the templates dialog got a list view, the global toolbar lock can now switched off via “View -> Toolbars”.

For Libreoffice Writer, Impress & Draw, all background fills can now be set to either cover the page inside the margins or the entire page.

Other changes in LibreOffice 7.2 include:

  • Writer:
    • Show various indexes and the mouse-over tooltip for a hyperlink to a document index entry mark.
    • Page styles now have a gutter margin
    • Added label and business card paper: A-One, Hisago, Sanwa Supply, Daiso.
    • Improved font caching to speed up text rendering.
    • Reduced opening time for some DOCX file.
  • Calc:
    • Added traditional Japanese month names, Japanese era name.
    • Implemented the Kahan summation algorithm.
    • Introduced ‘fat-cross’ cursor.
    • Redesigned Paste Special dialog.
  • IMPRESS & Draw:
    • Added Candy, Freshes, Grey Elegant, Growing Liberty, Yellow Idea templates.
    • Removed Alizarin, Bright Blue, Classy Red, Impress, Lush Green.
    • PDF signature verification is now based on PDFium
    • Multiple columns layout in LibreOffice text boxes.
    • Performance improvements for loading large images, and faster drawing of semi-transparent images.

How to Install LibreOffice 7.2 in Ubuntu:

There are a few ways to get the packages installed in Ubuntu, though the official PPA is highly recommended (see method 3)!

Method 1: LibreOffice Appimage

Without installing the software package, the Appimage is an universal Linux package format that can be run directly to launch the office suite.

Download LibreOffice Appimage

Just grab the “Fresh” version from the link button above. Then add executable permission, and right-click to run it:

Method 2: LibreOffice Snap:

Snap is the easiest way to install the office suite in Ubuntu. It’s official and updates automatically! Just search for ‘LibreOffice’ in Ubuntu Software and install the one from ‘snapcraft.io’:

NOTE: since the pre-installed one is native DEB package. You’ll have duplicated LibreOffice icons in ‘Activities’ overview search result after installed the Snap package.

Method 3: Install LibreOffice via Ubuntu PPA (RECOMMEND)

The official PPA is always preferred and recommended. It will upgrade the pre-installed LibreOffice packages to the latest and integrate well into Ubuntu desktop.

I put it as the last method because the PPA is not updated for the release at the moment. The maintainer has been building and testing the packages. And, now it’s ready for all current Ubuntu releases.

1. Add LibreOffice PPA

First open terminal from your system start menu (click top-left corner ‘Activities’, search for and open terminal). When it opens, run command:

sudo add-apt-repository ppa:libreoffice/ppa

So far, the PPA supports for Ubuntu 18.04, Ubuntu 20.04, Ubuntu 21.04, Ubuntu 21.10, and Linux Mint 20.

Next, you can upgrade the office suite using Software Updater (Update Manager) utility.

In Howtos
 

How to Install Kdenlive 21.08 in Ubuntu 21.10 via PPA

Last updated: August 19, 2021

KDE’s Kdenlive Video editor 21.08 was released. The official PPA added Ubuntu 21.10 “Impish Indri” support.

Kdenlive, stands for KDE Non-Linear Video Editor, is a free and open-source video editor for KDE though it also works on other desktop environment. And version 21.08 was finally released a few days later than other KDE Gear 21.08 apps.

The new release based on MLT 7 framework which has removed the Automask effect, along with many other legacy and buggy modules. The region module is also removed and replaced with new Effect Masking feature. As well, the old and unmaintained tools like the DVD Wizard and the Preview Compositing mode has been removed.

Kdenlive 21.08 got an improved performance, so users will have a smoother experience when importing hundreds of files and gigabytes and panning through the timeline.

Other features in the release include:

  • The new Time Remap feature allows to keyframe the speed of a clip.
  • Apply effects to only affect specific regions of a clip using masks.
  • Easily moves Guides along with clips using the Spacer Tool via the new Guides Locked option.
  • Ability to assign shortcuts to raise dock widgets.
  • Ability to assign shortcuts to 3 keyframe functions: Add/Remove Keyframe, Go to next keyframe and Go to previous keyframe.
  • Additional options to the same track transitions: Duration, Reverse and Alignment.
  • The command bar (toggle via Ctrl+Alt+i) to easily search for any action in Kdenlive, such as changing themes, adding effects, opening files and more.
  • New Copy value at cursor position to clipboard option
  • New mapping modes and options when importing tracked data
  • Option to go to start if playback started on timeline end

How to Install Kdenlive 21.08 in Ubuntu via PPA:

The Kdenlive official PPA has been updated with the latest packages for Ubuntu 20.04, Ubuntu 21.04, Ubuntu 21.10, and their derivatives, e.g, Linux Mint 20, Elementary OS 6, and Zorin OS 16.

1.) Add Ubuntu PPA:

Open ‘terminal’ from your system application menu, then run command to add the PPA:

sudo add-apt-repository ppa:kdenlive/kdenlive-stable

Type your password when it asks (no asterisk feedback) and hit Enter to continue.

2. ) Install or Upgrade Kdenlive:

If an old version of kdenlive was installed, you can upgrade it via Update Manager:

Or simply run command in terminal to install the video editor:

sudo apt install kdenlive

NOTE for Linux Mint or may be other Ubuntu based systems, you need to update the package cache manually by running sudo apt update command before installing the software.

Uninstall:

To purge the PPA as well as downgrade Kdenlive package, run command in terminal:

sudo apt install ppa-purge && sudo ppa-purge ppa:kdenlive/kdenlive-stable

To remove the PPA only, run command:

sudo add-apt-repository --remove ppa:kdenlive/kdenlive-stable

And to remove Kdenlive, run command:

sudo apt remove --autoremove kdenlive kdenlive-data
In Howtos
 

Zorin OS 16 Released! New Modern Beginner Friendly Linux based on Ubuntu 20.04

Last updated: August 18, 2021

Zorin OS 16 was officially released! Features Ubuntu 20.04 LTS package base, Kernel 5.11, and modified Gnome Desktop 3.36.

Zorin OS is an open-source Linux distribution for personal computers. It provides an user friendly desktop appearance based on Gnome. With built-in utility, it allows to single click changing UI layout to original Gnome, classic or modern Windows style.

A lightweight version is also available for old computers based on XFCE desktop environment. And it features “Zorin Connect”, GSConnect / KDE Connect similar implementation to link your Android phone and computer together.

What’s New in Zorin OS 16:

The new release introduced a revamped and refined desktop appearance, along with new wallpaper changes automatically according time of day.

The lock screen now displays a blurred version of desktop wallpaper, just like what it does in Ubuntu 20.04 LT. Follow GNOME 40, Zorin OS now has multi-touch gestures out-of-the-box for laptop users. The finger gestures are however a little different, and I prefer the way in Gnome and Elementary OS 6.

Touch-pad gestures:

  • 4 fingers up/down to switch workspaces.
  • Pinch with 3 fingers to trigger activities overview.

The Pro edition introduced a Windows 11 style desktop layout, though this edition need to play for downloading.

Other changes include:

  • Support flatpak and snap out-of-the-box.
  • New sound recorder app.
  • Redesigned Zorin Appearance
  • New Jelly mode to toggle wobbly window effect.
  • Better fingerprint reader support with simpler setup
  • Fractional scaling for high-resolution displays

Short overview of Zorin OS 16 via YouTube video:

And to get Zorin OS dico image, go to its website.

In News
 

SMPlayer 21.8.0 Adds macOS Support, Linux Appimage, Flatpak, & Snap

Last updated: August 18, 2021

SMPlayer media player released version 21.8.0 with official dmg package for macOS, and more binary packages for Linux users.

SMPlayer is a free open-source video player for Windows and Linux. By releasing v21.8.0, it finally adds macOS support officially. It uses MPV and/or MPlayer multimedia engine, so it can play virtually all video and audio formats.

The player remembers the settings of all files you play, so when you open an unfinished movie it will be resumed at the same point you left it, as well as the same settings. It also has built-in YouTube browser, allows to search for and click to play YouTube video directly in the media player.

I always keep SMPlayer in my system as an alternative media player, because it has some useful features that I need. They include:

  • ability to fetch subtitles from internet.
  • cast to smart phone and chromecast.
  • rotate video and change aspect ratio while playback.

What’s New in SMPlayer 21.8.0

Besides the macOS package, Linux Appimage, Flatpak, and Snap support, the release also include following changes:

  • Better automatic resizing of the main window, trying to prevent black borders.
  • Add option to rotate the video by 180 degrees.
  • Add some predefined speeds (0.25x, 0.5x, 1.25x, 1.5x, 1.75x).
  • Prevent a one second delay when using play prev/next.
  • The installation of YouTube support is now optional on Windows.
  • Disable power saving on Linux Wayland during playback.
  • And some bug-fixes.

How to Get SMPlayer:

The media player now is available at Github. All the binary packages as well as source tarball are available to download at the link below:

Download SMPlayer

For Linux, since Appimage is a non-install executable, Flatpak and Snap are universal package formats need separate daemons to run in sandbox, native .deb / .rpm package may still be preferred.

To install and keep SMPlayer native packages up-to-date, you can either use the official OBS repository for Arch Linux, Debian, Fedora, openSUSE.

Or use the official Ubuntu PPA for all current Ubuntu releases, Linux Mint, and derivatives.

1. Add Ubuntu PPA.

Open terminal either from start menu (click top-left ‘Activities’, search for and open terminal), or by pressing Ctrl+Alt+T on keyboard. When it opens, run command to add the PPA:

sudo add-apt-repository ppa:rvm/smplayer

Type user password, no asterisk feedback, and hit Enter to continue. So for, it supports Ubuntu 16.04, Ubuntu 18.04, Ubuntu 20.04, and Ubuntu 21.04.

2. Install / Upgrade SMPlayer:

After adding the PPA, you can either install it via command:

sudo apt update
sudo apt install smplayer smtube

or upgrade the player via Software Updater (Update Manager) if an old release was installed.

Uninstall SMPlayer in Ubuntu:

To remove the PPA, either open “Software & Updates”, go to “Other Software” line and remove the relevant repository line, or run command:

sudo add-apt-repository --remove ppa:rvm/smplayer

To remove the media player, run command:

sudo apt remove --autoremove smplayer smtube
In News
 

Enable Hardware Video Acceleration (VA-API) For Firefox in Ubuntu 20.04 / 18.04 & Higher

Last updated: February 13, 2024

This tutorial shows how to enable hardware video acceleration (VA-API) for Firefox, so it uses the video card to decode/encode video to save power.

Hardware video acceleration is a computer technology to make the graphics card to encode and decode video, thus offloading the CPU to save power. And compared to CPU, GPU are normally more efficient at the job.

UPDATE 2024: VA-API SHOULD BE ENABLED BY DEFAULT (if available) IN RECENT FIREFOX RELESES! SO, JUST GO TO BOTTOM TO VERIFY.

There are a few ways to achieve this on Ubuntu Linux, including:

  • Video Acceleration API (VA-API) – an open source API developed by Intel.
  • Video Decode and Presentation API for Unix (VDPAU) – open source API developed by NVIDIA.
  • NVENC/NVDEC – NVIDIA’s proprietary API.

The VA-API supports Intel, AMD, and NVIDIA (via open-source Nouveau drivers) GPUs. And it is widely supported by software, such as MPV uses va-api hardware acceleration for video playback by default if available.

The VDPAU API supports both AMD and NVIDIA, but has no support in Firefox or Chromium. And while NVENC/NVDEC is used for NVIDIA GPU only, we usually use VA-API for hardware video acceleration.

Firefox pop-up video encoding/decoding via Intel GPU

Verify VA-API:

NOTE: VA-API does not work on NVIDIA via proprietary drivers as mentioned above. If you installed NVIDIA proprietary driver via ‘Additional Drivers’ utility, this will only work when you choose ‘Intel (Power Saving)’ mode in NVIDIA Prime settings.

The VA-API may work out-of-the-box in Ubuntu. You can firstly open terminal from start menu (click ‘Activities’ and search terminal).

Next install vainfo package via command:

sudo apt install vainfo

And run it to check VA-API info:

vainfo

It outputs the driver as well as supported profile. VAEntrypointVLD means decoding support for this format, VAEntrypointEncSlice means encoding support.

If the command outputs an error, you can try to install drivers via command:

  • For NVIDIA nouveau and AMD, run command: 
    sudo apt install mesa-va-drivers
  • For Gen 8+ Intel hardware, install via command: 
    sudo apt install intel-media-va-driver

    And for old Intel hardware, install i965-va-driver instead via apt install command.

By setting the environment variable, you can choose which driver to use. For example, set “export LIBVA_DRIVER_NAME=i965” to use i965 driver. The value can also set to “nouveau” for NVIDIA, or “radeonsi” for AMDGPU.

Enable VA-API in Firefox:

Firefox added VA-API support since version 80, though it’s not enabled by default. You can enabled it manually by doing following steps one by one.

Firstly, open Firefox and go to about:config in url bar. Click on “Accept the Risk and Continue”. Then search for following keys, enable or disable them one by one:

  • media.ffmpeg.vaapi.enabled set to true
  • media.ffvpx.enabled set to false.
  • media.rdd-vpx.enabled set to false.
  • media.navigator.mediadatadecoder_vpx_enabled set to true.
  • If you experience page crashes, try setting security.sandbox.content.level to 0.

Secondly, set environment variable (for current user only). Open terminal and run command to edit profile file:

gedit ~/.profile

When file opens, add following lines to the end:

  • (Optional) Specify va-api driver as mentioned above (replace iHD accordingly): 
    export LIBVA_DRIVER_NAME=iHD

    You can SKIP this if vainfo outputs without error!

  • Diable RDD sandbox: 
    export MOZ_DISABLE_RDD_SANDBOX=1
  • For Xorg session, default in Ubuntu 18.04/Ubuntu 20.04: 
    export MOZ_X11_EGL=1
  • For Wayland session, default in Ubuntu 21.04 & higher: 
    export MOZ_ENABLE_WAYLAND=1

Finally, log out and back in. Open Firefox and play a video and see result!

Check if Hardware Video Acceleration working:

During video playback, you can use top command to see CPU usage before and after enable VA-API. For Intel GPU, there’s intel_gpu_top command that monitor it continuously.

Open terminal and run command to install the tool first:

sudo apt install intel-gpu-tools

Next, run command:

sudo intel_gpu_top

Start playing video in Firefox and you’ll see the video bar is busy (above 0%) if VA-API starts working.

For AMD GPU, there’s another command line tool “radeontop” available to monitor GPU activity.

NOTE for YouTube videos, the video codec may sometimes not supported by your hardware. To workaround, try h264ify or enhanced-h264ify extension to make YouTube stream H.264 videos instead of VP8/VP9.

That’s all. Enjoy!

In Howtos
 

Debian 11 ‘Bullseye’ Released! Kernel 5.10, exFAT, Modern Printers Support

Last updated: August 15, 2021

Debian 11, code-name ‘Bullseye’, officially released. Features 5-year support, Kernel 5.10 LTS, out-of-the-box support for exFAT file-system and most modern printers.

Debian is free open-source community-supported Linux distribution started in 1993. It aims to be “The Universal Operating System” that is suitable for Desktop users, servers to cluster systems; and for database, web, and storage servers. And it’s the basis for many other distributions, including Ubuntu.

In my mind, Debian is a quite stable and reliable system for production use. While serving with less system resources, it’s very popular for server users. Though the package base is a little old, there are package teams keep working for the security, stability and performance. And in “Bullseye”, the Debian Med team has been flighting against COVID-19 by packaging software for researching the virus on the sequence level and for the tools used in epidemiology.

What’s New in Debian 11:

For personal computers, Debian 11 is available via different Desktop Environments, including:

  • Gnome 3.38,
  • KDE Plasma 5.20,
  • LXDE 11,
  • LXQt 0.16,
  • MATE 1.24,
  • Xfce 4.16.

The release provides Linux Kernel 5.10 with support for exFAT file system. The exfat-fuse package is no longer required for mounting exFAT file-systems. And the exfatprogs provides the tools to create, check and label exFAT filesystems.

With ipp-usb, it offers out-of-the-box support for most modern printers without vendor specific drivers.

There are also updated packages including Apache 2.4.48, BIND DNS Server 9.16, Calligra 3.2, Cryptsetup 2.3, Emacs 27.1, GIMP 2.10.22, GNU Compiler Collection 10.2, GnuPG 2.2.20, Inkscape 1.0.2, LibreOffice 7.0, MariaDB 10.5, OpenSSH 8.4p1, Perl 5.32, PHP 7.4, PostgreSQL 13, Python 3.9.1, Rustc 1.48, Samba 4.13, and Vim 8.2.

Other changes includes:

  • Activate the persistent journal functionality by default.
  • New Fcitx 5 input method.
  • Defaults to Wayland and better addon support.
  • 64-bit/32-bit PC, PowerPC, IBM S/390, ARM, MIPS architectures support.
  • Over 11,294 new packages, 9,519 packages marked as obsolete and removed.

How to Get Debian 11:

Debian website provides small disco image that need internet connection while installing process to download more. There are also complete image, and live iso for trying Debian without installing it on your machine.

Get Debian 11

To upgrade from the previous Debian 10 buster, the documentation is available with detailed information.

In News
 

Thunderbird 91.0 Released with Native Apple Silicon Support, Multi-Process By Default

Last updated: August 12, 2021

Mozilla Thunderbird email client released new major 91.0 version with many new features and improvements.

Thunderbird 91.0 now runs in multi-process (e10s) mode by default, which offers many advantages in responsiveness, stability, performance, and security.

For macOS users, the release adds native support for computers with Apple silicon CPUs. There are also Latvian language support, new user interface for adding attachments, etc.

The ‘Account Setup’ has a new look and finally move to new tab instead of a floating dialog. It also adds ability to detect and set up CalDAV calendars and address book during setup.

The new version also brings improvements to Calendar, such as remote calendar auto-detection, ‘Edit’ option in event context menu, double-click to open .ics files, and import filter and sort items.

And a warning popup will appear when either trying to spend a reply to a likely non-existant email address such as “noreply@example.com”, or public recipients of a message exceeds threshold.

Other changes in Thunderbird 91.0 include:

  • Beta-level support for Matrix servers chat.
  • Enable redirect of messages.
  • PDF.js viewer support.
  • Allow showing empty CC/BCC rows in compose window
  • Allow pinning folder views to the Folder Pane
  • And much more!

How to Get Thunderbird 91.0 for Ubuntu:

As the release note said, the release only is available as a direct download, and not as an upgrade from Thunderbird version 78 or earlier.

Download Thunderbird (tar.bz2)

For Ubuntu Linux, it’s a tar.bz2 package. Once you get it, extract and right-click to run the executable to launch the client.

To create a shortcut icon for Thunderbird 91.0, you can open terminal (Ctrl+Alt+T) and run command to create & open a .desktop file:

gedit .local/share/applications/thunderbird91.desktop

Then paste following lines into the file. Replace “/PATH/TO/thunderbird“ with the executable file path, and finally save it.

If you don’t plan to move the source folder to another place for long time using, the file path should be: /home/USER_NAME/Downloads/thunderbird-91.0/thunderbird/thunderbird

[Desktop Entry]
Encoding=UTF-8
Name=Thunderbird 91.0
Comment=Send and receive mail with Thunderbird
Keywords=Email;E-mail;Newsgroup;Feed;RSS
Exec=/PATH/TO/thunderbird %u
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=thunderbird
Categories=Application;Network;Email;
MimeType=x-scheme-handler/mailto;application/x-xpinstall;
StartupNotify=true
Actions=Compose;Contacts

[Desktop Action Compose]
Name=Compose New Message
Exec=/PATH/TO/thunderbird/thunderbird -compose
OnlyShowIn=Messaging Menu;Unity;

[Desktop Action Contacts]
Name=Contacts
Exec=/PATH/TO/thunderbird -addressbook
OnlyShowIn=Messaging Menu;Unity;
In News
 

Install Shutter Screenshot Tool in Ubuntu 20.04/21.04 via Official PPA

Last updated: August 11, 2021

The official PPA for Shutter screenshot tool is back! So far contains packages for Ubuntu 20.04 and Ubuntu 21.04.

Shutter is one of the most popular screenshot tool for Linux. Other than basic screen capturing feature, it supports plugins, profiles, uploading to Imgur, Dropbox, etc., and has a built-in editor.

Shutter PPA was abandoned

The founder of Shutter has abandoned the project as well as the official PPA for many years. Due to the old Gtk2 dependency libraries, it has finally been removed from Ubuntu and Fedora repositories.

Luckily, a third-party PPA by linuxuprising is maintaining the Shutter package for over two years.

The development is back recently and moved to in Github. It now ported to GTK3. And the official PPA finally revived and maintained by the creator of linuxuprising.

Install Shutter via Official PPA:

For Ubuntu 20.04, Linux Mint 20, and Ubuntu 21.04, open terminal from start menu, and run following commands one by one.

1.) To add the official PPA, paste the command below into terminal and hit Enter:

sudo add-apt-repository ppa:shutter/ppa

Type user password (no visual feedback) when it asks and hit Enter to continue

2.) Next install the tool via command:

sudo apt install shutter

For Linux Mint, you need to run sudo apt update to manually refresh package cache.

Remove Shutter & Its PPA

You can remove Shutter PPA as well as other PPAs via “Software & Updates” utility under “Other Software” tab.

And remove Shutter if you want, by running command in terminal:

sudo apt remove --autoremove shutter
In Howtos
 

Firefox 91.0 Released with Enhanced Cookie Clearing / Https-First Policy

Last updated: August 11, 2021

Mozilla Firefox 91.0 is available with more than 1200 bug-fixes, new major privacy enhancement, and other features.

The release introduced more comprehensive logic for clearing cookies. With Firefox Strict Mode, you can clear a site data including embed content, such as images, videos and scripts, from other websites. This “cross-site” content was previously left behind.

You can now clear cookies and site data for current page by clicking the SSL lock icon in url bar. Or by right-clicking on sites under History menu and select ‘Forgot About This Site’.

For all sites, go to Settings -> Privacy & Security -> Cookies and Site Data. There you can click on “Manage Data” to search a site or remove all sites.

Firefox 91 now https first in Private Browsing windows. Even by clicking or entering http site in url, it tries to connect https first if available.

Other changes include:

  • Supports logging into Microsoft, work, and school accounts using Windows single sign-on.
  • Add Simplified option back in print settings.
  • New locale: Scots (sco)
  • The address bar now provides Switch to Tab results also in Private Browsing windows.
  • Automatic High Contrast Mode when “Increase Contrast” is checked on MacOS
  • 10-20% improvement in response time to most user interactions.
  • Various security fixes.

How to Install Firefox 91:

Usually, Ubuntu publishes the new Firefox packages through the security & updates repositories. So just wait and keep your system updated. It’s will be available in next few days.

Alternatively, see the release note and download the portable package from Firefox website.

In News
 

Video Trimmer – A Stupid Simple App to Cut a Clip Out of a Video in Linux

Last updated: August 10, 2021

Want to cut a clip out of a video and share with your friends? Try Video Trimmer, a stupid easy way for those working on Linux.

In Linux there are quite a few ways to cut clips or trim videos either in graphical or using command line tools. While video editors are heavy to do the job, FFmpeg is the most efficient choice. And Video Trimmer offers an intuitive user interface for those hate Linux commands.

It’s a free and open-source GTK app based on FFmpeg. By importing video via top-left “Open” button, you can preview the video and write down the start and end timestamps. And the top-left button turns to ‘Trim‘ for cutting the clip out.

It outputs the clip as a new video file. And the process is super fast and does not reduce the video quality, because it just cuts the data steam but never re-code.

Install Video Trimmer in Linux:

The source code of the project is hosted on gitlab. Besides building from the source, you can install it on most Linux via the Flatpak package.

Video Trimmer Flatpak

For beginners, you can open terminal from start menu and run following commands one by one in Ubuntu to get the software.

1.) Install the flatpak daemon for running the app via command:

sudo apt install flatpak

2.) Add the flathub repository which hosts the software package by running command:

flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

3.) You can finally install the app via command:

flatpak install flathub org.gnome.gitlab.YaLTeR.VideoTrimmer

After that, open it from start menu and enjoy!

Uninstall Video Trimmer:

To remove the app as well as its data, open terminal and run command:

flatpak uninstall --delete-data org.gnome.gitlab.YaLTeR.VideoTrimmer
In App Review