Chess.mkv.mp4 Info

The secondary (and active) extension indicating an MPEG-4 Part 14 container. 2. Container vs. Codec

A user may have attempted to convert an MKV file to MP4 by simply typing .mp4 at the end without actually converting the internal data. CHESS.mkv.mp4

The system reads the .mp4 footer, identifies the streams, and plays it natively on almost any modern device. The secondary (and active) extension indicating an MPEG-4

These are the methods used to compress and decompress the actual video and audio data inside the wrapper. 3. Why the Double Extension Exists identifies the streams

The primary extension indicating a Matroska multimedia container.

To understand this file, one must distinguish between containers and codecs: