# Create a build image FROM ubuntu:latest # Install necessary packages RUN apt-get update && \ apt-get install -y \ ca-certificates \ wget \ ffmpeg # Create a media volume VOLUME /media WORKDIR /media # Download a file from the internet, in this case my boy big buck bunny RUN wget http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4 -O source.mp4 # Copy an run a script to create a fragmented mp4 (more overhead, easier to split) COPY fragment . CMD ./fragment