I'm on Arch Linux with these packages installed from the extra repo:
2 extra/avidemux-cli 2.8.1-8 (5.4 MiB 18.7 MiB) (Installed)
Graphical tool to edit video (filter/re-encode/split)
1 extra/avidemux-qt 2.8.1-8 (2.3 MiB 12.4 MiB) (Installed)
Graphical tool to edit video (filter/re-encode/split) - Qt GUI
When I start Avidemux the window briefly appears and then disappears 0.1 second later and the program exits. I used to be OK because I used it before, but presumably with a newer version something is going wrong?
please start it from a terminal, and post the error message.
It's too long to post here and says it's spam, but I've pasted it here: https://pastebin.com/fMdrEHuf
Is this a Wayland problem again? I was using X11 before but got switched back to Wayland in the recent KDE Plasma 6.4 upgrade.
Either use an X11 session or lauch Avidemux with -platform xcb Qt command line option (losing hw accel related features). In any case, you are much better off using the latest 2.8.2 code. However, Wayland remains entirely unsupported (the GUI is totally broken in Qt6 on Wayland).
I've gone back to X11 and it works fine.