MKV to M2TS Converter

Convert MKV to M2TS: What This Tutorial Covers

This walks you through turning a Matroska (.mkv) file into an M2TS transport stream — the BDAV MPEG-2 container used by Blu-ray discs and AVCHD camcorders — and explains which codec and quality settings keep the output playable on the hardware you are targeting. M2TS is a re-encode, not a rewrap, so the steps below also cover where quality and extra tracks can be lost and how to limit it.

How to Convert MKV to M2TS

1. Upload Your MKV File: Drag and drop your .mkv onto the page or click "+ Add Files". You can queue several files and convert them with one set of settings.
2. Set the Video Codec: Open Advanced Options. The Video Codec defaults to H.264, which is what Blu-ray and AVCHD players expect; H.265, MPEG-2, MPEG-4, DivX, and Xvid are also available if a specific device needs them.
3. Pick Quality Preset or Specific File Size: Under File Compression, leave the Quality Preset at "Very High (Recommended)" to stay close to the source, or choose "Specific file size", "Constant Bitrate", or "Variable Bitrate" if you need to hit a size or bitrate ceiling.
4. Convert and Download: Click "Convert" and save your .m2ts file. No sign-up, no watermark.

Walk-through: Choosing Codec, Audio, and Resolution

M2TS is a container, so the playability of the output depends mostly on what you put inside it. The BDAV transport stream that .m2ts uses accepts H.262/MPEG-2, H.264/AVC, and VC-1 video, with Dolby Digital (AC-3), DTS, and Linear PCM among its audio options. xconvert defaults the Audio Codec to AAC, which most software players read; AC-3 is selectable and is the safer choice if your target is an AVCHD-era hardware player or a Blu-ray-style workflow, because AVCHD equipment specifically expects H.264 video paired with AC-3 or LPCM audio.

• Targeting a Blu-ray player or PS3-era console: keep Video Codec on H.264 and switch Audio Codec to AC-3.
• Feeding an AVCHD or Blu-ray authoring tool: H.264 video plus AC-3 audio matches what those pipelines import most cleanly.
• General playback on a PC or VLC: the H.264 + AAC default is fine and produces a smaller file.
• Matching a fixed display: use the resolution preset dropdown or "Width x Height"; otherwise leave it on "Keep original" so a 1080p source stays 1080p.

Common Errors and How to Fix Them

• "The .m2ts file will not play on my Blu-ray player" — A loose .m2ts file is not an authored Blu-ray disc. Many set-top players only read M2TS from a proper BDMV/AVCHD folder structure or a burned disc, not as a single file on a USB stick. Confirm your device reads standalone .m2ts files before assuming the conversion failed.
• "No sound on the TV but audio plays in VLC" — The hardware likely cannot decode AAC inside a transport stream. Re-convert with Audio Codec set to AC-3.
• "My subtitles and chapters are gone" — A bare transport stream does not carry MKV's soft subtitle and chapter tracks the way Matroska does. If you need captions, burn them in first or keep a separate subtitle file.
• "The file is much larger than the MKV" — Transport streams add packet overhead and the re-encode may use a higher bitrate than the source. Use "Specific file size" or lower the Quality Preset to rein it in.
• "Output looks softer than the original" — Converting MKV to M2TS re-encodes the video, which is one lossy generation. Keep the Quality Preset high to minimize the loss.

When This Doesn't Work

M2TS is a narrow, hardware-oriented target. If your goal is simply to play an MKV on a phone, smart TV app, or modern media player, convert MKV to MP4 instead — MP4 with H.264 is far more widely supported and produces smaller files. This tool also cannot rebuild a full Blu-ray disc image (BDMV menus, playlists, and folder structure) from a single video; it only produces the .m2ts stream itself. For the matching camcorder-style extension, see convert MKV to MTS, which writes the same BDAV format under the .mts name AVCHD devices use. Encrypted or DRM-protected source files cannot be converted.

Frequently Asked Questions

Is M2TS the same format as MTS?

Yes. Both are the BDAV MPEG-2 Transport Stream. The .m2ts extension is used on Blu-ray discs and PCs, while .mts is the same stream written with the 8.3 filename style AVCHD camcorders use. The container and codecs are identical.

Will converting MKV to M2TS lose quality?

It is a re-encode, so expect one lossy generation rather than a perfect copy. In our testing, leaving the Quality Preset on "Very High (Recommended)" keeps a 1080p H.264 source visually close to the original; dropping to lower presets to save space is where softness becomes noticeable.

Which audio codec should I choose for M2TS?

For software players, the default AAC works. For AVCHD-era hardware or a Blu-ray-style workflow, choose AC-3 — AVCHD equipment expects H.264 video with Dolby Digital (AC-3) or LPCM audio, so AC-3 is the more compatible pick on physical players.

Does M2TS support 1080p and 4K?

The BDAV transport stream is built for high-definition video and 1080p is well within its scope. 4K is carried by Ultra HD Blu-ray, which uses the same .m2ts container, but standalone-file 4K playback depends entirely on whether your target device can decode it.

Why doesn't my converted .m2ts file play like a Blu-ray?

A single .m2ts file is the video stream, not a finished disc. Authored Blu-ray and AVCHD playback relies on a BDMV/AVCHD folder structure with playlists and menus that a loose file does not include. Standalone .m2ts files play on PCs and on devices that explicitly support reading them directly.

How are my files handled after conversion?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.