VideoBinary

`video/x-matroska`

MKV (Matroska)

Reference for video/x-matroska, the Matroska container format supporting virtually any video, audio, and subtitle codec.

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Expected extensions: .mkv

HTTP Content-Type Header

HTTP Header

Content-Type: video/x-matroska

Associated File Extensions

.mkv

Quick Facts

MIME Type	video/x-matroska
Category	Video
Type	Binary
Extensions	.mkv

Common Usage

MKV is the most flexible video container format, supporting any video codec, multiple audio tracks, subtitles, chapters, and attachments. It is the preferred format for high-quality video archiving, Blu-ray rips, anime fansubs, and media server libraries (Plex, Jellyfin).

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.mkv" type="video/x-matroska">

<!-- Or for script/media elements -->
<script type="video/x-matroska" src="file.mkv"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('video/x-matroska');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'video/x-matroska' });

nginx

# nginx.conf — add to types block or use default
types {
    video/x-matroska  mkv;
}

# Or set for a specific location
location /api/ {
    default_type video/x-matroska;
}