GoPro Quik is a nice app to cut movies in no-time. For sure it does not replace Premier or similar but perfect if you like to share a cool video after a day filming the kids.
The app works with videos shot with the GoPro only. This is fine in 90% of the cases for me but sometimes I like to import movies shot with my Lumix or even mobile phone. Using ffmpeg no GoPro movies can be converted using the following command:
ffmpeg -i NAME.mp4 -map_metadata -1 -codec copy -metadata:s handler="GoPro AVC encoder" -metadata:s handler_name=" GoPro AVC" gopro-quick-video.mp4
Makes sure to use the command prompt as „Administrator“.
BTW: If the video is in portrait you can use the follwing command to convert to landscape:
ffmpeg -i NAME.mp4 -vf "scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:-1:-1:color=black" video5hoch.mp4