DCP-o-matic is a free, open-source program to create Digital Cinema Packages (DCPs) from videos, images, sound and subtitle files. You can use it to make content for playback on DCI-compliant cinema projectors.
It can take files in many different formats, including MP4, Apple ProRes, MOV, AVI, VOB (from DVDs), M2TS (from Blu-Ray), WMV, MKV, JPEG, PNG, TIFF and lots of others.