# Sample MKV video files for testing, free, CC0 and hotlinkable 5 MKV test files from 621.3 KB to 2.1 MB: 2 audio tracks, SRT subtitles, VP9 + Opus, 3 chapters, 720p H.264 + AAC. Direct URLs, SHA-256 per file, CC0. The page: . `mkv/720p-5s.mkv` carries H.264 video and AAC audio at 1280x720, the codecs of `mp4/720p-5s.mp4`, so between the two the container is the only variable: a player, thumbnailer or upload validator that handles the MP4 and fails on the MKV has a Matroska problem, not a codec problem. `mkv/vp9-opus-720p-5s.mkv` turns that round, with the VP9 and Opus of `webm/720p-5s-vp9.webm` in general Matroska, for sniffers that tie VP9 to the .webm extension or Matroska to H.264. `mkv/multi-audio-2-tracks-720p-5s.mkv` has two audio tracks, measured at 440 Hz and 880 Hz, so a converter or player that only ever takes the first track is caught by the tone it plays. `mkv/with-subtitles-720p-5s.mkv` adds an SRT (`subrip`) subtitle track, which a remux that drops or mis-maps text tracks loses. `mkv/with-chapters-720p-5s.mkv` adds 3 chapters to its Matroska chapter list, for seek menus and chapter navigation that need something to show. ## Files | Path | Size | MIME | Properties | |---|---|---|---| | [`mkv/720p-5s.mkv`](https://loremfile.dev/mkv/720p-5s.mkv) | 2 MB (1,971,254 bytes) | `video/x-matroska` | 1280x720, 5.021 s, h264, High, level 3.1, aac, 48 kHz, 1 channel | | [`mkv/multi-audio-2-tracks-720p-5s.mkv`](https://loremfile.dev/mkv/multi-audio-2-tracks-720p-5s.mkv) | 2.1 MB (2,052,109 bytes) | `video/x-matroska` | 1280x720, 5.021 s, h264, High, level 3.1, aac, 48 kHz, 1 channel | | [`mkv/vp9-opus-720p-5s.mkv`](https://loremfile.dev/mkv/vp9-opus-720p-5s.mkv) | 621.3 KB (621,281 bytes) | `video/x-matroska` | 1280x720, 5.008 s, vp9, Profile 0, opus, 48 kHz, 1 channel | | [`mkv/with-chapters-720p-5s.mkv`](https://loremfile.dev/mkv/with-chapters-720p-5s.mkv) | 2 MB (1,971,331 bytes) | `video/x-matroska` | 1280x720, 5.021 s, h264, High, level 3.1, aac, 48 kHz, 1 channel | | [`mkv/with-subtitles-720p-5s.mkv`](https://loremfile.dev/mkv/with-subtitles-720p-5s.mkv) | 2 MB (1,971,511 bytes) | `video/x-matroska` | 1280x720, 5.021 s, h264, High, level 3.1, aac, 48 kHz, 1 channel | The same list as JSON: .