HEVC to M2TS Converter

Convert HEVC to M2TS: What This Tutorial Covers

A .hevc file is a raw H.265 video bitstream — the bare compressed stream an encoder or DVR writes out, with no container, no timing index, and no audio, which is why most players refuse to open it directly. M2TS is the BDAV (Blu-ray Disc Audio-Video) transport-stream container that Sony, Panasonic, and the Blu-ray Disc Association built for disc and AVCHD-camcorder workflows. This tutorial walks through wrapping that unplayable bare stream into an .m2ts that Blu-ray authoring tools and transport-stream pipelines can read — and is honest about the two catches that trip people up: by default the converter re-encodes H.265 down to H.264 for standard AVCHD/Blu-ray compatibility, and no audio appears because the source never had any.

How to Convert HEVC to M2TS

1. Upload Your HEVC File: Drag and drop your .hevc file onto the page or click "+ Add Files" to browse from your computer. You can queue several raw H.265 streams and process them with the same settings.
2. Pick a Quality Preset: Open Advanced Options. Under "File Compression" keep the "Preset" on "Very High (Recommended)" for a near-source result, or switch to "Specific file size" to target an exact size in MB — useful because H.264 output is larger than the H.265 source at matched quality. "Constant Bitrate" gives a predictable size for disc authoring; "Constraint Quality" caps the worst-case bitrate to stay under Blu-ray limits.
3. Set Resolution and Trim (Optional): Use the "Preset Resolutions" or "Width x Height" to downscale (standard AVCHD tops out at 1920×1080); under "Show All Options" the "Video Codec" defaults to H.264, the codec standard AVCHD and Blu-ray expect. Use the "Trim" section's "Time Range" to cut to just the segment you need.
4. Convert and Download: Click "Convert" and download your M2TS. No sign-up, no watermark.

Walk-through: The H.265 to H.264 Re-encode (and When to Keep H.265)

M2TS is a Blu-ray/AVCHD transport-stream container, and standard AVCHD camcorder and disc workflows were written in 2006 around H.264 (AVC) — AVCHD has no provision for H.265 at all. So for the common case this is not a rewrap that keeps your existing stream: the converter decodes the H.265 frames and re-encodes them to H.264 inside an MPEG-2 transport stream (this page's "Video Codec" defaults to H.264). Two consequences follow, and both are one-way:

• Quality can only hold or drop, never improve. H.264 is a generation older and less efficient than H.265, so re-encoding adds a second lossy pass on top of whatever compression the H.265 stream already applied. No setting recovers detail — the best you can do is keep the "Preset" high so the loss stays invisible.
• The file gets bigger at the same visual quality. Because H.264 needs more bits than H.265 for an equivalent picture, the M2TS is typically larger than the .hevc it came from. Independent comparisons put H.265 at roughly 35–50% lower bitrate than H.264 for the same quality, so expect the output to grow accordingly. 1

There is one exception that M2TS allows but AVCHD does not. UHD (4K) Blu-ray uses HEVC inside M2TS, so if your target is a UHD Blu-ray authoring pipeline rather than a camcorder or standard BD, open "Show All Options" and switch the "Video Codec" from H.264 to H.265. That keeps the original codec efficiency and avoids the re-encode penalty — but only UHD Blu-ray and HEVC-aware players will accept it; standard AVCHD camcorders and ordinary Blu-ray players will not.

A few patterns cover most needs:

• Standard Blu-ray or AVCHD authoring: leave "Video Codec" on H.264 and "Preset" on "Very High," and accept the larger file.
• A downstream device caps bitrate (standard Blu-ray video is capped at 40 Mbps; AVCHD 1.0 peaks at 24 Mbit/s, AVCHD 2.0 Progressive at 28 Mbit/s): use "Specific file size" or "Constraint Quality" to stay under the limit. 2
• UHD Blu-ray target: switch "Video Codec" to H.265 to keep the efficient stream.

There is no audio step here because a raw .hevc elementary stream carries none — HEVC is a video-only codec. The M2TS will be silent unless you add a track in your editor.

HEVC vs M2TS — What You're Actually Converting

Common Errors and How to Fix Them

• "The M2TS has no sound" — Expected. The source .hevc is video-only, so there's nothing to put on an audio track. Real camcorder/disc M2TS files carry AC-3 or LPCM audio recorded alongside the picture; a bare H.265 stream has neither.
• "The output is bigger than my HEVC file" — Expected when the codec is H.264 (the default). AVCHD/standard Blu-ray mandate H.264, which is less efficient than H.265, so matching the quality costs more bits. Drop the preset, set a "Specific file size," or — for a UHD Blu-ray target only — switch the "Video Codec" to H.265.
• "My Blu-ray player won't play the M2TS" — A loose .m2ts on a disc isn't a finished Blu-ray. Players expect the full BDMV folder structure; copy to a USB stick for casual playback, or author a proper disc (see below).
• "My 4K stream looks downscaled or won't import into a camcorder tool" — Standard AVCHD is HD-only (max 1920×1080). Set a 1080p preset first, or keep H.265 and target UHD Blu-ray instead.
• "VLC plays it but my authoring software won't import it" — Some tools expect the camcorder/disc folder layout, not a single loose file.

When This Doesn't Work — and What to Use Instead

A lone .m2ts is the right stream but not a finished disc: a playable Blu-ray or AVCHD disc also needs the surrounding BDMV structure (STREAM\00001.m2ts, plus CLIPINF\*.clpi and PLAYLIST\*.mpls). Import the .m2ts into authoring software like multiAVCHD, TMPGEnc Authoring Works, or Nero Vision to build a compliant disc image, then burn it. Pick M2TS only when a Blu-ray, AVCHD-disc, or PS3-era authoring pipeline specifically requires it. If you just want the clip to play and stay efficient, HEVC to MP4 keeps the H.265 stream inside an MP4 (no quality loss) and plays natively almost everywhere; HEVC to MKV is the flexible-container alternative. For a camcorder/SD-card workflow rather than disc, HEVC to MTS targets the same AVCHD stream with the uppercase .MTS extension.

Frequently Asked Questions

Does this re-encode my HEVC to H.264, or keep the H.265 stream?

By default it re-encodes to H.264. M2TS is used for AVCHD camcorders and standard Blu-ray, both of which expect H.264 (AVC), so the "Video Codec" defaults to H.264 — a decode of the H.265 frames followed by a fresh H.264 encode, which is a second lossy pass and a larger file. The one exception is UHD (4K) Blu-ray, which uses HEVC inside M2TS: open "Show All Options" and set the "Video Codec" to H.265 to keep the original codec and avoid the re-encode, but only HEVC-aware UHD players will accept it.

Why is the converted M2TS larger than the original HEVC file?

Because the default output codec, H.264, is roughly 35–50% less efficient than H.265 at the same visible quality, so it needs more bits to encode the same picture. 1 Standard AVCHD and Blu-ray lock you to H.264, so there's no way to keep the smaller H.265 stream and stay compliant for those targets. To reduce the size, lower the "Preset" or set a "Specific file size," or — for a UHD Blu-ray target — switch the "Video Codec" to H.265 and keep the efficiency.

Why doesn't the M2TS have any audio?

Because a raw .hevc file is a video-only elementary stream — it carries no audio track for the converter to copy or transcode. HEVC is purely a video codec. Camcorder and disc M2TS files include AC-3 or LPCM audio because the source recorded sound alongside the picture, but a bare H.265 stream has neither. If you need sound, add it in your editor after conversion.

Can I burn the output straight to a Blu-ray disc?

The .m2ts is the correct stream format, but a playable Blu-ray needs the full BDMV folder structure (BDMV\STREAM\00001.m2ts, plus CLIPINF, PLAYLIST, and INDEX.BDM). Use authoring software such as multiAVCHD, TMPGEnc Authoring Works, or Nero Vision to wrap the .m2ts into a compliant disc image, then burn it. For casual playback on a PS5 or USB-friendly Blu-ray player, copying the loose .m2ts to a USB stick often works without full authoring.

My HEVC source is 4K — can the M2TS keep that resolution?

It depends on the target. Standard AVCHD is HD-only and caps at 1920×1080 2, so for a camcorder or AVCHD-disc workflow set a 1080p preset before converting. UHD Blu-ray, however, supports 4K HEVC inside M2TS — for that pipeline, switch the "Video Codec" to H.265 under "Show All Options" and keep the full resolution. If you only need 4K playback rather than a disc, HEVC to MP4 handles it natively.

How are my files handled, and how long are they kept?

In our testing, re-encoding a short 1080p H.265 clip to H.264 M2TS at the "Very High" preset produced a noticeably larger file than the source — the expected cost of dropping to the older codec for AVCHD/Blu-ray compatibility. Your file is uploaded over an encrypted connection, decoded and rewrapped into M2TS on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.