Shotstack is a video, image and audio editing service that allows for the automated generation of videos, images and audio using JSON and a RESTful API. You arrange and configure an edit and POST it to the API which will render your media and provide a file location when complete. For more detail
curl \
-H "x-api-key: $API_KEY" \
https://api.shotstack.io/v1/assets/{id}curl \
-H "x-api-key: $API_KEY" \
https://api.shotstack.io/v1/render/{id}curl \
-H "x-api-key: $API_KEY" \
https://api.shotstack.io/v1/assets/render/{id}