Free Software that I rely on. One per day.
Day 18:
MKVToolNix
This is a tool kit of utilities, including a GUI front end, for manipulating Matroska streaming multimedia files (usually "MKV" or "MKA" files).
The Matroska container format allows for multiple audio, video, and text streams, which means you can encode a video with multiple options for audio and subtitles (as well as alternate video tracks).
It also supports setting up "Chapter" marks.
A must-have for authoring and checking complex videos for streaming and download use.
#Linux Weekly Roundup for November 9th, 2025: #Devuan GNU+Linux 6.0, MX Linux 25, #LXQt 2.3, #KDE Plasma 6.5.2, #PorteuX 2.4, Trinity Desktop Environment R14.1.5, #NVIDIA 580.105.08, KDE Gear 25.08.3, #fwupd 2.0.17, #Calibre 8.14, #MKVToolNix 96.0, #LinuxMint's new troubleshooting tools, a new #AMD-powered Linux laptop, and more https://9to5linux.com/9to5linux-weekly-roundup-november-9th-2025
MKVToolNix 96.0 Released with New CLI Parameter and Improved AV1/IVF Support
#MKVToolNix 96.0 Released with New CLI Parameter and Improved AV1/IVF Support https://9to5linux.com/mkvtoolnix-96-0-released-with-new-cli-parameter-and-improved-av1-ivf-support
#Linux Weekly Roundup for September 14th, 2025: #KDE Plasma 6.4.5, #PipeWire 1.4.8, #LMDE 7, #GStreamer 1.26.6, #openSUSE disabling #Bcachefs support, #VirtualBox 7.2.2, KDE Gear 25.08.1, #Q4OS 6.1, Hyprland 0.51, Puppy Linux BookwormPup64 10.0.12, #MKVToolNix 95.0, KDE Frameworks 6.18, #Steam Client update, new Slimbook laptops, #fwupd 2.0.15, #Kodi 22 alpha, and more https://9to5linux.com/9to5linux-weekly-roundup-september-14th-2025
#MKVToolNix 95.0 Open-Source MKV Manipulation Tool Released with Improvements to the Chapter Generation Feature https://9to5linux.com/mkvtoolnix-95-0-mkv-manipulation-tool-improves-the-chapter-generation-feature