MTS to HEIF Converter

Extract a HEIF Still from MTS (AVCHD): What This Covers

This tutorial is for anyone holding .mts camcorder footage who wants a single, space-efficient still frame rather than a whole clip. By the end you'll have pulled an exact frame (by timestamp) from an AVCHD recording and saved it as a HEIF image — and you'll know when HEIF is the right target and when JPG or PNG serves you better.

How to Convert MTS to HEIF

1. Upload Your MTS File: Drag and drop or click "+ Add Files" to load .mts recordings straight off a Sony or Panasonic AVCHD camcorder. Batch upload works — each file is processed independently and returned separately.
2. Pick the Frame with "Specific Frame": Choose Specific Frame and enter the Time (seconds) of the moment you want (e.g., 12.5 for the 12.5-second mark), or switch to Multiple Screenshots to grab a still at a fixed interval across the whole clip.
3. Tune Quality Preset and Resolution (Optional): Set Quality Preset (default Very High; Highest down to Lowest available) or switch to Specific file size. Keep the original resolution, pick a Preset Resolution, or scale by percentage.
4. Convert and Download: Click "Convert". Frames are processed on our servers and returned as HEIF — a single file, or a ZIP if you extracted several. No sign-up, no watermark.

Walk-through: Choosing the Right Frame

The frame-extract controls are the heart of this conversion, so it's worth understanding the two modes:

• One exact moment — Select Specific Frame and type the timestamp into Time (seconds). Decimals are allowed: 30 is the frame at thirty seconds, 90.5 is one minute thirty-and-a-half seconds, 3600 is the one-hour mark. The converter seeks to the nearest decodable frame; because AVCHD is H.264 with a group-of-pictures structure, the true seek point lands on the closest keyframe, typically within a second or two of what you asked for.
• A frame every N seconds — Select Multiple Screenshots when you want a contact sheet or a set of evenly spaced stills. Each screenshot is written as its own separate HEIF file, and the batch is delivered together in a ZIP. This is the fast way to skim an hour of footage down to a handful of representative frames.
• If the still looks soft — Raise Quality Preset to Highest. Remember the frame inherits whatever H.264 already threw away in the camcorder; the HEIF step then re-encodes it with HEVC, which is efficient but still lossy. You cannot recover detail the original AVCHD recording never stored.

MTS (AVCHD) vs HEIF — What You're Converting Between

Common Errors and How to Fix Them

• "My HEIF won't open in a web browser" — Expected. Outside Safari 17+, Chrome, Firefox, and Edge show HEIF as an unknown file. If the still is going on a website or into a chat, extract it as JPG with MTS to JPG instead.
• "The exported frame is slightly off from the timestamp I typed" — The seek lands on the nearest decodable H.264 keyframe. Try a timestamp half a second to either side, or use Multiple Screenshots at a tight interval and keep the frame you want.
• "Windows won't preview the HEIF" — Windows 11 22H2 and later open HEIF out of the box; on older Windows 10 you need the free HEIF Image Extension from the Microsoft Store. If a recipient can't install it, send a JPG.
• "The still is grainy or blocky" — That grain is baked into the H.264 source, not added by the HEIF encoder. Raising Quality Preset to Highest preserves it faithfully but won't remove it.

When This Doesn't Work

HEIF is the wrong target if the still has to be shared widely or displayed on the open web — most browsers simply won't render it, so reach for MTS to JPG for universal compatibility or MTS to PNG when you need a lossless, editable still. If you specifically want the Apple .heic extension that iPhones and Macs write, use MTS to HEIC — it's the same HEVC-coded image under a different name. And if you actually wanted to keep the clip as video rather than pull a frame, this image converter isn't the tool; going the other direction (a HEIF photo back into an AVCHD stream) is handled by HEIF to MTS.

Frequently Asked Questions

Why would I extract a HEIF instead of a JPG from my MTS file?

HEIF stores a still at roughly half the bytes of an equivalent-quality JPEG and can carry 10-bit colour and HDR metadata that JPEG cannot. The catch is reach: only Safari 17+ renders HEIF natively, about 14% of browsers per caniuse. So HEIF wins for Apple-ecosystem use and storage-tight archives; JPG wins anywhere the image needs to be shared or shown on the web.

Will the HEIF be as sharp as the original AVCHD footage?

It will be as sharp as the source frame allows, but no sharper. AVCHD records with H.264, which is already lossy, and HEIF then re-encodes that frame with HEVC — efficient, but a second lossy step. Keeping Quality Preset at Highest preserves the most detail; it cannot add detail the camcorder never captured.

What's the difference between HEIF and HEIC for this conversion?

HEIC is HEIF with HEVC encoding — the specific subset Apple ships on iPhones and Macs, using the .heic extension. HEIF is the broader container. xconvert outputs standards-compliant HEVC-coded HEIF here, so the file opens wherever HEIC does; if a tool insists on .heic, use MTS to HEIC for that exact extension.

Why do I get a single image, not a playable video?

HEIF is primarily a still-image container, so the converter pulls the frame you point it at — one frame via Specific Frame, or several via Multiple Screenshots, each saved as its own HEIF. HEIF technically supports image sequences, but most viewers (macOS Preview, Windows Photos) only show the first frame, so this tool treats each capture as a separate still.

Which devices and apps can open the HEIF I get?

Native support covers macOS High Sierra (10.13) and later, iOS 11+, iPadOS, Android 10+, and Windows 11 22H2+ out of the box (Windows 10 needs the free HEIF Image Extension). Among browsers, only Safari 17+ shows them in an <img> tag. Editors like Photoshop 2022+, Affinity Photo, and GIMP (via plugin) open them too. In our testing, a 1080p frame from an AVCHD clip at the Very High preset came out around 300-450 KB — well under half what the same frame cost as a quality-matched JPG.

Is my .ts/.mts file uploaded to your servers?

Yes. MTS files are larger than a browser can comfortably decode for frame extraction, so this conversion runs through our server-backed pipeline: the file is uploaded over an encrypted connection, the frame is extracted on our servers, and the upload is deleted automatically a few hours after conversion. No account, no watermark, and the file is never shared or made public.