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How to open .MKV files on Windows

To open .MKV files on Windows, open with VLC or MPC-HC for full compatibility.

Step-by-step instructions

  1. Open with VLC or MPC-HC for full compatibility.
  2. Consider installing K-Lite Codec Pack for broader support.

Common issues

Subtitles are missing

The player may not automatically select the correct subtitle track.

  1. Access the subtitle settings in your player.
  2. Manually select the desired subtitle track.
  3. Use MKVToolNix to set a default subtitle track.

Audio out of sync

Audio may not sync properly with video playback.

  1. Use VLC to adjust audio delay.
  2. Check for updated codecs or player versions.
  3. Remux the file with corrected audio sync using MKVToolNix.

Playback stutters or lags

High-resolution files may cause performance issues.

  1. Ensure your device meets the file's playback requirements.
  2. Try a different media player with better optimization.
  3. Reduce video quality or resolution if possible.

The MKV video does not open or plays without sound in the built-in player

MKV is a container that can hold many codecs. Built-in players, such as QuickTime on the Mac, do not support all of them.

  1. Open it in VLC, which plays MKV files with its own codecs.
  2. To convert it without quality loss, run ffmpeg -i input.mkv -c copy output.mp4 (works when the codecs fit into MP4).
  3. If that fails, re-encode it to H.264/AAC with HandBrake (free).

Still can’t open your .MKV file?

Repair a damaged .MKV file

If the file opens with errors or not at all, a dedicated repair tool can often rebuild it. Work on a copy and keep the original file untouched.

Wondershare Repairit (Video)

Repairs corrupt or unplayable video files such as MP4, MOV and AVI.

Recover a deleted or lost .MKV file

If the file was deleted by mistake or the drive was formatted, data recovery software may be able to get it back. Stop writing to that drive right away, because new data can overwrite what you want to recover.

MiniTool Power Data Recovery

Windows software that recovers deleted or lost files from PCs and external drives such as HDDs, SSDs, USB drives and memory cards, after deletion, formatting or a crash.

Wondershare Recoverit

Windows and Mac software that recovers deleted or lost files from computers and external drives such as HDDs, SSDs, USB drives and SD cards.

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Security note

Avoid downloading codec packs from untrusted sources.

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