When comparing Avidemux vs Flowblade, the Slant community recommends Flowblade for most people. In the question“What are the best video editors for Linux?” Flowblade is ranked 4th while Avidemux is ranked 12th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Fast, light, best option if you only need some light editing like cutting the video
Pro Powerful and light-weight
Pro Multifunctionality
Pro Free and open source
Flowblade is licensed under GPLv3 with source code available on GitHub.
Pro Stable
Has an interface similar to OpenShot and PiTiVi but doesn't crash when previewing videos or after few render.
Cons
Con Can't edit multiple clips together
Only clip by clip editor.
Con Linux-only small user base
If you have a friend/machine running anything other than Linux, it won't work. So you cannot transfer knowledge as easily and this also results in a rather small user base so also fewer tutorials and online support.
Con Lack of advanced editing features
Doesn't support stabilization or complex transitions for example.
Con Requires higher display resolution
Con GPU rendering is unstable
A fair amount of hardware and driver combinations crash the software.