MKV to AVCHD Converter

How to Convert MKV to AVCHD Online

1. Upload Your MKV File: Drag and drop or click "Add Files" to select MKV files. Movie rips, anime episodes, screen recordings, and edited camcorder masters all work. Batch is supported — drop in a folder of MKV files at once.
2. Pick a Quality Preset or CRF: AVCHD locks the video codec to H.264 (the only codec the format allows) and the audio to AC-3 by default. Choose a Quality Preset (Highest → Lowest), target a percentage of the original size, set an exact file size in MB, or fine-tune with CRF (18 = visually lossless, 23 = default for camcorder playback, 28 = smaller MTS for archival). For disc authoring, Highest or CRF 18-20 keeps headroom for a clean Blu-ray master.
3. Set Resolution and Trim (Optional): AVCHD is a 1080p / 720p HD format — pick a resolution preset (1920×1080, 1280×720, 1440×1080) or scale by percentage. Older AVCHD camcorders only ingest 1080i / 1080p / 720p, so don't downscale below 720p if the disc must play on the device. Use the trim section to enter a start time and duration in HH:MM:SS.sss to cut to just the segment you want on disc.
4. Convert and Download: Click Convert. Files process in your browser session — no sign-up, no watermark — and download as MTS / M2TS streams ready to be placed in the AVCHD folder structure (BDMV/STREAM/).

Why Convert MKV to AVCHD?

MKV (Matroska) is the open container of choice for full-quality movies, anime, and edited masters — it accepts any codec and unlimited tracks. AVCHD (Advanced Video Coding High Definition) is the consumer HD camcorder standard developed by Sony and Panasonic in 2006: H.264 video plus AC-3 audio inside an MPEG-2 Transport Stream (.mts / .m2ts), arranged in a strict BDMV/ directory structure. Most reasons to convert MKV → AVCHD:

• Re-importing edited footage into a Sony or Panasonic camcorder — Sony Handycam, FX series, and Panasonic HC-X / AG-AC bodies will only re-ingest video that matches the AVCHD spec exactly. Editing in a modern NLE produces an MKV master; converting to AVCHD lets you put the edit back on the camcorder's SD card for tape-style archival.
• Authoring AVCHD discs that play on any Blu-ray player or PS4 / PS5 — Burn the resulting MTS files into the BDMV/STREAM/ folder structure on a regular DVD-R or BD-R and standalone Blu-ray players, PS4, and PS5 will play it like a real Blu-ray. No Blu-ray burner required for AVCHD-on-DVD.
• Ingesting into older AVCHD-only NLEs — Sony Vegas (pre-13), Pinnacle Studio, and several Panasonic-bundled editors only accept native AVCHD MTS — they reject MKV and even some MP4 sources. Converting first lets the legacy NLE see the footage as a proper AVCHD clip.
• Long-form storage that survives format obsolescence — AVCHD is an industry-standard published spec (Blu-ray Disc Association). Storing masters as MTS in BDMV folders means any computer, NAS, or future Blu-ray player will still read them in 20 years, while obscure MKV codec combinations may not.
• Sharing footage on TVs without a media server — Burn the BDMV folder to a USB stick, plug into a 2010-or-later Sony / Panasonic / Sharp TV, and AVCHD plays natively. MKV requires the TV to have specific codec support, which many do not.
• Stripping multi-track baggage for camcorder playback — MKVs often carry 5+ audio tracks and subtitles that confuse AVCHD-only devices. Converting normalizes the stream to single-track H.264 + AC-3, which every AVCHD device handles cleanly.

MKV vs AVCHD — Format Comparison

Quality Preset / CRF Quick Guide

Note: AVCHD spec caps peak video bitrate at 24 Mbps for AVCHD 1.0 and 28 Mbps for AVCHD 2.0 (Progressive). If a downstream device rejects the file, drop the bitrate below 24 Mbps.

Frequently Asked Questions

What's the difference between AVCHD, MTS, and M2TS?

They're closely related. MTS is the raw filename extension AVCHD camcorders write directly to SD card. M2TS is the same content, used inside the AVCHD BDMV/STREAM/ folder structure on a disc. AVCHD is the overall spec (folder structure + stream format). Our converter outputs the stream format used by both — pick the .mts or .m2ts variant if you need a specific extension, or stick with AVCHD for the folder-ready file.

Will the file work on my Sony / Panasonic camcorder?

If the camcorder supports AVCHD ingest (most Sony Handycam, HDR-CX/PJ, FX, and Panasonic HC-V / HC-X models do), yes — copy the converted MTS file into the PRIVATE/AVCHD/BDMV/STREAM/ folder on the SD card and the camcorder will see it. Older camcorders may also need the index files refreshed; some manufacturer utilities rebuild that automatically.

Can I burn the converted file to DVD and play it on a Blu-ray player?

Yes — that's one of AVCHD's main use cases. Place the MTS file inside BDMV/STREAM/ on a regular DVD-R, add the standard BDMV/ index files (most disc-burning apps add these automatically when you select "AVCHD disc"), and any Blu-ray player from 2008 onward, plus PS4 / PS5, will play it as a Blu-ray-style disc — no Blu-ray burner needed.

Why does AVCHD lock me to H.264?

The AVCHD spec is a strict subset of Blu-ray, written in 2006 when H.264 was the only HD codec consumer hardware decoders supported. Adding H.265 or AV1 would break compatibility with every AVCHD camcorder, Blu-ray player, and PS4 ever made. If you need H.265, output to MKV or MP4 instead.

What if my MKV is 4K — can I keep the resolution?

No. AVCHD caps at 1080p (1920×1080 progressive, 1440×1080 interlaced). The converter will downscale 4K MKV sources to 1080p automatically when AVCHD is selected. If you need to keep 4K, output to MP4 (H.265 / 4K-friendly) or use the MXF target for Blackmagic / pro workflows.

Will my audio tracks and subtitles transfer?

Only the primary audio track converts (re-encoded to AC-3, the AVCHD default). Additional audio languages and subtitle tracks are dropped — AVCHD only supports limited PGS subtitles and a single primary audio stream in most consumer-device implementations. If you need every track preserved, keep the source MKV and use a Matroska-aware player.

Can I batch convert a whole TV season at once?

Yes — drop in 20+ episodes and each converts in your browser session. Output is one MTS per source MKV. For disc-authoring multiple episodes onto the same AVCHD disc, you'll still need a separate disc-authoring app to assemble the BDMV/PLAYLIST/ files, but the converted MTS streams are the input that app needs.

Why is the converted MTS file larger than the original MKV?

If the source MKV used H.265 or AV1, AVCHD's mandatory H.264 re-encode is roughly 30-50% less efficient — same visible quality, larger file. Drop the CRF to 25-28 or pick the "Low" quality preset to claw the size back. For a 90-minute movie, expect roughly 6-10 GB at default settings.

Does the file include the BDMV folder structure I need for a disc?

The converter outputs the stream file (the .mts content). The surrounding BDMV/INDEX.BDM, BDMV/MOVIEOBJ.BDM, and BDMV/PLAYLIST/00000.MPL index files are generated by your disc-authoring app (multiAVCHD, tsMuxeR, ImgBurn with AVCHD template, or built-in tools in Vegas / EDIUS). Drop the converted .mts into the authoring app's input list and it will build the folder structure for you.