AVCHD to HEVC Converter

AVCHD vs HEVC — Should You Re-encode Your Camcorder Footage?

If you have a library of AVCHD camcorder clips eating disk space, re-encoding them to HEVC (H.265) is a genuine win: HEVC is roughly 40-50% more efficient than the H.264 already inside AVCHD, so an archive can shrink ~30-50% at similar quality. The catch is honest and important — this is a lossy-to-lossy re-encode, so the file gets smaller but the picture never gets better, and HEVC plays on fewer devices than the H.264 your AVCHD files already use. Convert to HEVC only when storage matters more than reach and you've confirmed your playback devices decode H.265.

AVCHD vs HEVC — Side-by-side Comparison

Where HEVC (H.265) Actually Plays

Compatibility is the deciding factor for this conversion, so confirm your target devices are on this list before you re-encode a whole library.

When to Convert AVCHD to HEVC

• You're archiving a large camcorder library and want to reclaim 30-50% of disk space at similar visual quality.
• Your playback devices all decode HEVC — recent iPhones/iPads, Apple Silicon Macs, 2016+ smart TVs, and Snapdragon 800+ Android phones.
• You run a media server (Plex or Jellyfin) that direct-streams HEVC to Apple TV, Shield, and Fire TV, cutting the CPU cost of transcoding AVCHD's MPEG-TS on the fly.
• Storage cost beats compatibility — per-GB cloud-backup bills roughly halve when an H.264 archive becomes HEVC.

When to Stay on AVCHD's H.264 (or Convert to MP4 Instead)

• You want footage that plays everywhere — H.264 is universal; HEVC is not. Chrome and Edge need an OS-level hardware HEVC decoder, and Firefox only added partial HEVC support in v137 (2025).
• You're editing — most editors prefer H.264 MP4 as an intermediate, and the unusual .hevc extension confuses import dialogs even though the file is Matroska inside. Use AVCHD to MP4 for an editable, broadly compatible file.
• You're uploading to social platforms — they expect MP4/H.264, not a .hevc-labeled file.
• You expect the conversion to sharpen the image — it can't. Re-encoding already-compressed H.264 to H.265 cannot recover detail the camera's first encode discarded.

How to Convert AVCHD to HEVC

1. Upload Your AVCHD File: Drag and drop the .MTS or .M2TS clips from your camcorder's BDMV/STREAM folder, or click "+ Add Files". Batch conversion is supported, so you can queue a whole shoot at once.
2. Pick Quality Preset and Compression Method: Output codec is H.265 / HEVC. The default Quality Preset is "Very High (Recommended)" — the right archival choice. Switch File Compression to Constant Quality (CRF), Constant Bitrate, or Variable Bitrate, or set a Specific file size, to trade size against quality.
3. Resize, Trim, or Set Audio (Optional): Leave Video resolution on "Keep original" to preserve the camera's 1920×1080, pick a Preset Resolution, or enter a custom Width × Height. Use Trim → Time Range to keep only part of a clip. Audio defaults to AAC; switch to AC-3 in the Audio Codec dropdown to keep a Dolby Digital track.
4. Convert and Download: Click Convert. 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.

Frequently Asked Questions

Will converting AVCHD to HEVC improve the picture quality?

No — it will make the file smaller, not the picture better. AVCHD already stores compressed H.264, and re-encoding that to HEVC is a lossy-to-lossy step: HEVC cannot add back detail the camcorder's original H.264 encode threw away. What you gain is file size — roughly 30-50% smaller at similar perceived quality. Keep the Quality Preset on "Very High" so the re-encode stays visually close to the source.

Why does my AVCHD footage play everywhere but the HEVC output doesn't?

Because AVCHD uses H.264, which every device built since around 2005 decodes, while HEVC (H.265) playback is fragmented. Safari supports it from version 11, Chrome and Edge added support in v107 but rely on an OS-level hardware decoder (they decline software-only HEVC decode), Windows needs the HEVC Video Extensions package, and Firefox only added partial support in v137 (2025) via the operating system's decoder. So HEVC is the smaller but less compatible target. If you need footage that plays anywhere, use AVCHD to MP4 with H.264 instead.

What happens to the AC-3 or PCM audio when I convert to HEVC?

AVCHD camcorders record Dolby AC-3 (the common choice) or uncompressed Linear PCM. The HEVC output re-encodes audio to AAC by default and stores it alongside the video in the Matroska container, so the sound is preserved — it isn't dropped. AC-3 to AAC is a lossy-to-lossy step that adds slight generational loss, so encode at a bitrate matching or exceeding the source to keep it minimal. If you'd rather keep a Dolby Digital track untouched, choose AC-3 in the Audio Codec dropdown instead.

How much smaller will my camcorder archive actually get?

In our testing, a 1080p AVCHD clip recorded at ~22 Mbps re-encoded to HEVC at the "Very High" preset landed roughly 35-45% smaller with no quality loss visible at normal viewing distance. The exact ratio depends on the footage — high-motion clips compress less than static scenes — but a two-hour camcorder card that sits around 19 GB in AVCHD typically drops to the 10-12 GB range as HEVC.

My player won't open the .hevc file — how do I make it play?

xConvert's .hevc output is a Matroska container — the same bytes as an .mkv — carrying the H.265 video plus its AAC or AC-3 audio track, just saved with a .hevc extension. Players that identify files by their contents (VLC, mpv, IINA, MPC-HC) open it and play sound normally. Players that key off the file extension — QuickTime, Windows Photos, Apple TV, and many smart-TV apps — may refuse a .hevc file even though they can decode H.265. The quickest fix is to rename the extension to .mkv; for a container those players accept out of the box, run AVCHD to MKV or AVCHD to MP4 and pick H.265 in the Video Codec dropdown.

Why is one long AVCHD recording split into several files, and can I convert them all at once?

AVCHD camcorders record to SD cards formatted as FAT32, which caps any single file at 4 GB. To get past that limit the camera "spans" a long take across sequential .mts files, usually breaking every 10-30 minutes at typical AVCHD bitrates of roughly 17-28 Mbps. Each segment is a complete, playable clip, so you can drop the whole set in here and convert them in one batch — each file becomes its own .hevc and you download them together. To rejoin the pieces into a single continuous clip, import the original AVCHD folder into an editor that reads the spanned structure, or convert each segment to MP4 first and join the MP4s on a timeline.

Is HEVC or AV1 the better archive codec for old camcorder footage?

Both beat H.264 on size; HEVC is the safer pick for hardware playback today because more existing devices decode it in silicon, while AV1 is royalty-free and slightly more efficient but has narrower hardware decode support on older gear. For a legacy camcorder library you'll mostly play back on phones, Apple devices, and recent TVs, HEVC is the pragmatic choice. If you only ever play it in VLC/mpv on a modern PC, AV1 saves a little more space.

How are my files handled, and is there a size limit?

Your AVCHD file is 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. The main practical limit is upload size and time rather than the conversion itself: AVCHD clips carry full HD video and can be large, so a long recording may take a while to upload even though the slower HEVC encoding runs on our servers rather than your machine. The same conversion works for the .mts extension via MTS to HEVC.