goptest is a simple cli utility that uses ffmpeg to to check the keyframe interval of a video. For livestreaming you often want the GOP-size of your video's to be small and consisten all the way through.
goptest some-video.mp4
Might output something like
Stream 0 has a consistent GOP size of 48
This projects is build on top of ffmpeg and requires libraries like libavutil.so
to be installed on your system.