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Need help?How to Convert Video to AVCHD Online
- Upload Your Video File: Drag and drop or click "+ Add Files" to load MP4, MOV, MKV, AVI, WMV, FLV, WebM, MTS, M2TS, 3GP, MPEG, or any of 30+ supported video sources. Batch upload works — every file gets the same AVCHD settings.
- Pick Video Codec and Quality Preset: AVCHD output uses H.264 by default (the codec the AVCHD spec actually requires). Pair it with AC3 audio (the AVCHD-mandated audio codec) under Audio Codec. Set Quality Preset to Very High for camcorder-grade output, or switch to Constant Bitrate and dial in 17-24 Mbps for 1080p — that's the AVCHD 1.0 sweet spot that real Sony and Panasonic camcorders use.
- Resize and Trim (Optional): Choose a Preset Resolution (1080p or 720p — the list is height-only, so the width follows your source's aspect ratio) to stay inside the AVCHD spec, scale by Resolution Percentage, or set an exact Width x Height such as 1920 x 1080 or 1440 x 1080. Use Trim with Time Range to clip to a start time and duration before encoding.
- Convert and Download: Click "Convert". Files process server-side, then download as
.m2ts(the post-import AVCHD extension). No sign-up, no watermark, no installs.
Why Convert to AVCHD?
AVCHD (Advanced Video Coding High Definition) was introduced jointly by Sony and Panasonic in 2006 as the consumer-HD camcorder standard. It wraps H.264 video and AC3 (or LPCM) audio in an MPEG-2 transport stream, and it remains the format Blu-ray authoring tools, prosumer editors, and a decade of camcorder archives expect. Converting modern MP4 footage into AVCHD is mostly a compatibility move — putting clips back into a workflow that was built around .m2ts.
- Blu-ray disc authoring — Tools like TMPGEnc Authoring Works, DVDStyler, and older Sony/Panasonic suites accept AVCHD natively, but balk at arbitrary MP4 profiles. Converting first avoids re-encoding on import.
- Camcorder-archive consistency — If your library is hundreds of
.m2tsclips from a Sony HDR-CX or Panasonic HDC-TM, dropping in stray MP4s breaks scene detection and date-grouping. AVCHD-normalize new footage so your editor treats everything the same. - Legacy editor compatibility — Vegas Pro, PowerDirector, and pre-2018 Premiere builds have AVCHD ingest pipelines tuned for H.264-in-MPEG-TS at AC3 audio. MP4 with AAC sometimes lands in a different decoder path with slower scrubbing.
- Hardware playback on Blu-ray players — AVCHD discs burned to standard DVD-R media play on most certified Blu-ray players (look for the AVCHD logo). A raw MP4 burned to DVD-R will not.
- Broadcast and prosumer delivery — Older NXCAM and AVCCAM professional decks expect H.264 in the AVCHD container at 17 or 24 Mbps. Converting is the simplest way to hit that spec.
AVCHD vs MP4 — Format Comparison
| Property | AVCHD (.m2ts / .mts) | MP4 (.mp4) |
|---|---|---|
| Container | MPEG-2 transport stream | ISO Base Media (MPEG-4 Part 14) |
| Video codec | H.264/AVC (Main or High Profile) | H.264, H.265, AV1, MPEG-4, VP9 |
| Audio codec | AC3 (Dolby Digital) or LPCM | AAC (most common), MP3, AC3 |
| Max bitrate | 24 Mbps (AVCHD 1.0), 28 Mbps (AVCHD 2.0) | No hard cap; codec-dependent |
| Max resolution | 1920x1080 (60i/30p/24p) | 8K+ supported |
| Typical use | Consumer HD camcorders, Blu-ray authoring | Web, streaming, mobile, near-universal |
| Camcorder support | Sony HDR-CX, NEX, NXCAM; Panasonic HDC, AVCCAM | Same camcorders' "MP4 mode" |
| Blu-ray-disc compatible | Yes, on DVD-R or BD media | Re-encode required |
| Web browser playback | Limited (needs transcode) | Native everywhere |
| File size for 30 min 1080p | ~300 MB at 17 Mbps | ~100-200 MB |
AVCHD Bitrate & Quality Quick Guide
| Target | Bitrate | When to use |
|---|---|---|
| FH (Full HD high) | 17 Mbps | Default 1080p AVCHD 1.0; original camcorder output |
| HA (High Action) | 17 Mbps interlaced (60i) | Fast-motion 1080i clips |
| FX (Full HD extra) | 24 Mbps | Maximum AVCHD 1.0 quality before AVCHD 2.0 |
| PS (Progressive) | 28 Mbps | AVCHD 2.0 only; 1080/60p footage |
| HQ / SP / LP | 9-12 / 7 / 5 Mbps | Smaller files, lower quality (use Constant Bitrate) |
Tip: under Advanced Options, set Video Codec to H.264, Audio Codec to AC3, and pick Constant Bitrate with one of the values above for the most camcorder-faithful result.
Frequently Asked Questions
Why is the output .m2ts instead of .avchd?
.avchd is the format name, not a working file extension. Real AVCHD output uses .mts (the extension camcorders write directly to SD card) or .m2ts (the extension assigned once you copy the clip onto a computer). Both are identical MPEG-2 transport streams. Most editors and Blu-ray authoring tools expect .m2ts, which is what we emit.
Will my AVCHD file play in VLC or QuickTime?
VLC plays AVCHD natively on Windows, macOS, and Linux. QuickTime on macOS will not — Apple deprecated AVCHD playback support after QuickTime 7. Use VLC, IINA, or import into iMovie/Final Cut Pro, both of which transcode AVCHD on ingest.
Does this support 1080/60p (AVCHD Progressive / AVCHD 2.0)?
Yes. The AVCHD 2.0 spec extended the format in 2011 to support 1080/60p and 1080/50p at up to 28 Mbps. Pick a 1080p source, leave Video Codec on H.264, and set bitrate to 28 Mbps under Constant Bitrate to target the AVCHD 2.0 (PS) mode.
Why is my AVCHD file larger than the source MP4?
Two reasons. First, AC3 audio (the AVCHD-required audio codec) is typically 256-640 kbps, while AAC audio in MP4 is often 128-192 kbps — that's an extra 100-450 kbps of overhead. Second, AVCHD uses an MPEG-2 transport stream container, which adds packet headers every 188 bytes; that's a few percent of container bloat that MP4's ISO container avoids.
Can I burn the result to a regular DVD as an AVCHD disc?
Yes — that's actually one of AVCHD's defining features. AVCHD discs can be authored onto standard DVD-R media and will play in most Blu-ray players that carry the AVCHD logo. Use TMPGEnc Authoring Works, multiAVCHD, or DVDStyler to author the disc; the .m2ts we produce is exactly what those tools expect.
What's the maximum bitrate I should target?
For AVCHD 1.0 (the most universally compatible version): 24 Mbps. For AVCHD 2.0 (1080/60p mode): 28 Mbps. Going above 28 Mbps puts you outside the spec, and some older Blu-ray players will refuse the disc. If you want maximum quality with broader future-proofing, consider converting to MP4 with H.265 instead — same H.264 family, no bitrate ceiling, much wider playback support.
Does the converter preserve multi-channel surround audio?
Yes, when the source has 5.1 surround. AVCHD officially supports Dolby AC3 in stereo and 5.1 channel configurations. Our default Audio Codec for AVCHD output is AC3, which keeps the channel layout from the source. If the source is stereo AAC, the output stays stereo AC3.
Is there a file size limit?
Single files up to the standard xconvert upload cap process in one pass. For very long camcorder reels, split the source into ~20-30 minute chunks before upload — that matches the way real AVCHD camcorders auto-split clips at the FAT32 4 GB boundary, and it makes Blu-ray authoring cleaner. If your source is already AVCHD and you just need to clip it, the video cutter is the simpler tool.
Should I pick H.264 or H.265 for AVCHD output?
H.264. AVCHD's spec is built on H.264/MPEG-4 AVC; H.265 (HEVC) is not part of the AVCHD standard and Blu-ray players that expect AVCHD will reject an H.265-encoded .m2ts. If you want HEVC efficiency, output HEVC or H.265-in-MP4 instead — but it won't be AVCHD.