MOS to AVCHD Converter

How to Convert MOS to AVCHD Online

1. Upload Your MOS Files: Drag and drop your Leaf RAW images, or click "+ Add Files" to select them. Batch is supported, so you can drop a full session and produce one AVCHD slideshow or one video per frame.
2. Pick Merge Strategy and Image Duration: Choose "Merge images" to fold the whole set into a single AVCHD slideshow, or "Video per image" to emit one .mts file per photo. Set Duration to control how long each photo holds on screen — defaults are 1, 2, 3, 5, or 10 seconds, with sub-second steps available for animation-style cadence.
3. Set Background Color and Resolution (Optional): Pick a Background Color for letterbox bars when the photo aspect ratio does not match the video frame (default Black; White, Gray, and the Sony/Panasonic studio-standard solid colors are available). For Video Resolution, keep original or pick a Preset — for AVCHD-spec playback choose 1920x1080 (1080p) or 1280x720 (720p), since the AVCHD standard caps at 1920x1080.
4. Convert and Download: Click Convert. Files process in your browser session — no sign-up, no watermark, and the .mts output drops straight onto an SD card or USB stick for camcorder and Blu-ray ingest.

Why Convert MOS to AVCHD?

MOS is the proprietary RAW format used by Leaf digital camera backs — the Aptus, Aptus-II, and Credo series, including Mamiya Leaf bodies. A single Aptus-II 80 frame is a 165 MB uncompressed RAW packing 80 megapixels of medium-format sensor data, which is glorious for print but useless for any device that wants a video stream. AVCHD wraps H.264/AVC video and Dolby AC-3 (or linear PCM) audio inside an MPEG-2 transport stream — the same recording format Sony and Panasonic introduced in 2006 for HD camcorders, and the format Blu-ray players read natively from disc, SD card, or USB.

• Photo gallery on the TV — Convert a fashion or commercial shoot into a 1080p AVCHD slideshow, drop it on a USB stick, and a 2007-or-newer Blu-ray player will play it on the living-room TV without a computer in the loop.
• Camcorder ingest for hybrid timelines — Sony/Panasonic AVCHD camcorders import .mts files alongside their own footage, letting you cut still photos into a video timeline using the camera's native edit suite.
• Archive a session as a single video file — A 200-image Leaf shoot is 30 GB of RAWs; the same shoot at 5 seconds per frame and 1080p AVCHD is roughly 1-3 GB at the spec's 24 Mbit/s ceiling.
• Client review without RAW software — Most clients do not own Capture One. Handing them an AVCHD .mts file means VLC, QuickTime, Windows Media Player, or any smart TV will play the proofs.
• Burnable to AVCHD-on-DVD — AVCHD authored on standard 4.7 GB DVD-R media plays on most Blu-ray decks (capped at 18 Mbit/s on DVD media per the spec), so a single DVD can hold a long-format slideshow without a Blu-ray burner.
• Headless playback on consumer hardware — Smart TVs, PS3/PS4, Xbox, and standalone media players all decode the MTS container without external codecs.

For a more universal, web-friendly slideshow consider MOS to MP4; to deliver still images in a standard photo format use MOS to JPG or MOS to TIFF. The same engine produces the AVCHD-family siblings MOS to MTS and MOS to M2TS — MTS is the camcorder-side extension, M2TS is the Blu-ray-side extension; the bitstream is identical.

MOS vs AVCHD — At a Glance

Resolution and Bitrate Quick Guide

Frequently Asked Questions

What cameras actually produce .mos files?

Leaf digital backs — the Aptus and Aptus-II line (5, 6, 7, 8, 10, 12, 17, 22, 28, 33, 40, 56, 75, 80) and the Credo series — write .mos. These mounted on Mamiya 645AFD, Contax 645, Hasselblad H, AFi, and HY6 medium-format bodies. A separate, unrelated .mos exists in MIDI/score-editing software (Mosaic) and on Canon camcorders as part of the AVCHD folder structure — neither is what this converter handles.

Can I keep the merge as a single video versus one file per photo?

Yes. The Merge Strategy dropdown gives both. "Merge images" emits one .mts containing every uploaded photo at the selected duration; "Video per image" emits N .mts files. Merge is what you want for a slideshow; per-image is useful when each photo needs its own asset for an editing timeline.

What resolution should I pick for AVCHD?

1920x1080 (1080p). The AVCHD specification was designed around 1920x1080 and 1440x1080, with 1280x720 as the lower tier. Picking "Keep original" on an 80 MP Leaf file yields a non-spec stream that most Blu-ray players and camcorders will refuse — the AVCHD bitstream constraints assume one of the standard resolutions.

Why is converting an 80 MP RAW to 1080p worth doing at all?

Because the destination — TV, camcorder, Blu-ray deck — cannot display more than 1920x1080 over its HDMI/component output. Down-rezzing from 80 MP to 2 MP (1080p) actually produces a sharper visible result than upscaling a smaller source, since the 80 MP frame oversamples every output pixel roughly 40x. Detail loss only matters if your delivery target is print or 4K+.

Will this preserve the RAW dynamic range?

No. RAW is by definition unprocessed sensor data; AVCHD is 8-bit Y'CbCr 4:2:0 video. The 16-bit-per-channel CCD data, 12 f-stop dynamic range, and demosaicing-stage flexibility all bake down into 8-bit color when the frame is rendered to video. Edit and grade in Capture One first, export final JPEG/TIFF, and let the converter encode the finished pixels.

My Adobe software cannot open compressed .mos files — does that matter for this tool?

No. Adobe Camera Raw historically refused IIQ-style compressed Leaf MOS files (a long-standing community complaint), but xconvert decodes the file directly to render frames into the AVCHD stream. If your file opens in Capture One, Leaf Capture, RawTherapee, or Affinity Photo, this converter will handle it.

What is the difference between AVCHD, MTS, and M2TS?

AVCHD is the specification — H.264 video plus AC-3 audio in an MPEG-2 transport stream, with constraints around bitrate and resolution. .mts is the file extension your camcorder writes; .m2ts is the same bitstream after Blu-ray authoring or Windows import. xconvert can output either extension; pick the one your downstream tool expects.

Will the AVCHD output play on my smart TV without a Blu-ray player?

Most likely yes, but it depends on the TV. Sony, Panasonic, Samsung, and LG smart TVs from roughly 2010 onward read .mts/.m2ts from USB. If a TV refuses, MOS to MP4 (H.264 in MP4) is the most universally compatible alternative — same video codec, friendlier container.

Does the converter add audio to the video?

No audio is added by default. AVCHD requires an audio track for some strict decoders, so the converter writes a silent AC-3 stream when needed to keep the file spec-compliant. If you want music behind the slideshow, add it later in any NLE (DaVinci Resolve, Premiere, iMovie) — they all open .mts directly.