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 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

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, 2017+ smart TVs, Snapdragon 820+ Android phones.
• You need a raw .hevc elementary stream to feed into a muxer or hardware-encoder pipeline that expects the Annex B bitstream without container overhead.
• Storage cost beats compatibility — cloud-backup bills that charge per GB 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 added partial HEVC only in v107 and still needs OS-level hardware decode; Firefox doesn't enable it by default.
• You're editing — most editors prefer H.264 MP4 as an intermediate; raw .hevc won't drop onto a timeline. Use AVCHD to MP4 for an editable, broadly compatible file.
• You're uploading to social platforms — they accept MP4/H.264, not raw .hevc streams.
• 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 several clips from one shoot.
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 the Compression Method to Constant Quality (CRF), Constant Bitrate, or Variable Bitrate, or set a target file size, to trade size against quality.
3. Resize, Trim, or Set Audio (Optional): Leave 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 13, Chrome added partial support in v107 but relies on OS-level hardware decode, Edge needs the HEVC Video Extensions package, and Firefox doesn't enable HEVC by default. So HEVC is the smaller but less compatible target. If you need footage that plays anywhere, convert to 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, which is what most HEVC-aware players expect. AC-3 to AAC is a lossy-to-lossy step that adds slight generational loss — encode at a bitrate matching or exceeding the source to keep it minimal. If you want to keep a Dolby Digital track, 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.

Why is the output a .hevc file instead of a video container?

Plain .hevc is a raw H.265 elementary stream (Annex B bitstream), not a container like MP4 or MKV. Players such as VLC, mpv, and IINA open it directly, but QuickTime, Windows Photos, and most smart-TV apps expect the HEVC stream wrapped in a container. If you want a file those play, use AVCHD to MP4 and choose H.265 from the codec dropdown, or re-wrap with AVCHD to MKV.

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: AVCHD clips carry full HD video and can be large, so a long recording may take a while to upload even though HEVC encoding, while slower than H.264, runs on our servers rather than your machine. The same conversion works for the .mts extension via MTS to HEVC.