Converting TS Video to MP4 using FFmpeg FFmpeg is a powerful, open-source, and widely-used multimedia framework that can handle a wide variety of audio and video formats. In this guide, we will focus on how to use FFmpeg to convert a video file in the Transport Stream (TS) format to the more common MP4 format. The command we will be using for this conversion is: ffmpeg -i input.ts -c:v libx264 -c:a copy output.