After installation you need to install mencoder too. Adjust setting from the example (add space). Specify full filename including filetype .mp4. Then it does the job very well. The second time you need to clear the frames in /home/.stopmotion to be able to reuse the application. (Mint 19.3)
Used it once and loved it. On Mint 18.3 now won't run, just dumps with segmentation fault.
another tool..... ffmpeg it's same
i love it, but still learn