So check if your chosen container format, be it mkv, mp4 or even avi has support for all the content in your files (video, audio, subtitles, data, etc). Some containers may not support some formats. Add -map 0 if you want to select all streams from the input. For example, if your input has two video streams and one audio stream then only the video stream with the largest frame size will be selected.

Think of it like a copy and paste.ĭefault stream selection behavior is to select only one stream per stream type. codec copy stream copies, or 're-muxes', the streams from the input to the output without re-encoding. It auto-detects a Matroska to MP4 container conversion based on input/output filenames. It is one of the backends for many of the GUI tools mentioned in other answers.Ĭhanging container without re-enconding content could not be simpler:įfmpeg -i input.mkv -codec copy output.mp4 Libav is a fork of FFmpeg, which Ubuntu switched to for a few years until Ubuntu 15.04. Perhaps the easiest tool for that is ffmpeg, or avconv from the libav-tools package.

Install avidemux ubuntu 20.04