VidCutter is a free simple Qt5 based app for for Linux, Windows and mac from Pete Alexandrou. It is written in Python3 & PyQt5 GUI framework. It uses FFmpeg as its decoding and encoding backend. Using this tool you can trim and join your videos very easily.
Download VidCutter [Windows and Mac]
How to install VidCutter on ubuntu
To install VidCutter on ubuntu, you need to add the authors’s official repository. Open terminal and run the below command.
sudo add-apt-repository ppa:ozmartian/apps
Then type your ubuntu password.And hit enter key confirm the installation.
Then type the below command and hit enter,
sudo apt-get update
Then type the below command and hit enter and if asked type Y and hit enter to install VidCutter.
sudo apt install vidcutter
After the successful installation of VidCutter restart your ubuntu. Type the below command in terminal app to start it .
Click the Dash home from unity launcher. And type VidCutter in the search field. Then click VidCutter
The trimming process is very simple , just click the open button and load your video and trim using start and end button. And then save your clip.