Batch video editing processing

I need a script running on Linux which must take a multipart video file and: - join all small files in a single resulting video file - add a static image to the resulting video file (at the beginning and at the end) - add custom text to the resulting video (at the beginning and at the end) - cut the resulting video in small extracts (a JSON file with multiple start-time/end-time will be provided) - join the extracts in a single resulting video file - add an audio file to the resulting video file All operations must be done with FFMPEG and more accurate specifications will be provided. In order of preference, the script can be developed in nodejs, python or php and must run on a headless linux pc.