Did you play MKV on Mac before? The third-party or built-in software? This post will recommend more amazing ways to play MKV on Mac.

Assuming you have all of your .avi video files in a single directory, navigate to that directory in a terminal and you can use the following single line of code to iterate through all of the .avi files and convert them to .mp4 files:

for i in .avi; do ffmpeg -i "$i" "${i%.}.mp4"; done

In case you’re interested, the code is a loop. The first part starts the loop (“for i in *.avi;”), telling the computer to look for every file with the file extension .avi. The second part tells the computer what to do with every file with that extension – convert it to a .mp4 file with the same name. The last piece indicates what to do when the loop is completed – done.

Of course, this code could also be used to convert any other file format into a different format by replacing the .avi or .mp4 file extensions in the appropriate places. For instance, to convert all the .avi files to .mkv, the code would look like this:

for i in .avi; do ffmpeg -i "$i" "${i%.}.mkv"; done

The WebM Project has been slowly getting more support from the browser community with Edge 14 adding support in the Anniversary edition of Windows 10. At the same time more .webm files are created by new HTML5 APIs like WebRTC when recording WebRTC sessions and the the MediaStream Recorder API.

Au cas où certains ne connaissaient pas : cet outil permet de refaire vos MKV (sous titres, langues, chapitres…) sans ré-encoder toute l’audio/vidéo…
https://mkvtoolnix.download/