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Supports: MOS
A MOS file is a Leaf medium-format camera RAW photo — a single still image, not a video. Converting it to MPEG wraps that one frame in an MPEG-2 video clip that holds the image on screen for a set duration. This is the right choice when you specifically need a video file (for a player, a timeline, or a kiosk loop); if you just want a normal, openable photo, convert MOS to a still image instead.
MOS holds wide-latitude raw sensor data at high bit depth. MPEG is an 8-bit lossy video format, so the conversion bakes the raw down to standard video range — you lose the editing headroom that made the RAW useful. Two honest paths:
| Property | Value |
|---|---|
| Type | Raw still image (single frame) |
| Origin | Leaf medium-format digital backs (later Leaf/Mamiya Aptus) |
| Container | Based on TIFF / EXIF structure |
| Payload | Uncompressed or lossless-compressed raw sensor data, high bit depth |
| Opens in | Capture One, Adobe Camera Raw / Lightroom, RawTherapee |
| Best converted to | JPG / TIFF / PNG for a photo; MPEG / MP4 only when a video is required |
| Property | Value |
|---|---|
| Standard | ISO/IEC 13818 (MPEG-2) |
| First published | 1996 |
| Video codec (xconvert default) | MPEG-2, lossy |
| Audio | MP2 in the program stream — but image-to-video output is silent |
| Bit depth | 8-bit |
| Best for | DVD-Video, broadcast, legacy players that expect an MPEG program stream |
.mos file onto the page or click "+ Add Files" to browse from your computer.Because a MOS file is a still photo with no sound. Image-to-video conversions produce a video track only — there is no audio to carry over, so the resulting MPEG clip is silent by design. If you need a soundtrack, add one afterward in a video editor.
Yes, some. MOS stores high-bit-depth raw sensor data; MPEG-2 is an 8-bit lossy video format. The wide tonal latitude that makes RAW useful for editing is baked down during conversion. For a high-fidelity still you can edit, convert MOS to TIFF instead.
If your goal is to view, share, print, or edit the picture, convert to a photo format — MOS to JPG is the most compatible. Choose MPEG only when a downstream tool, player, or workflow specifically requires a video file rather than an image.
It equals the Image Duration you set multiplied by the number of frames. With a single MOS file at the default 5 seconds per frame, you get a 5-second clip. Raise or lower the duration to make a longer or shorter freeze-frame video.
Yes. Upload multiple MOS files and use the Merge strategy option set to "Merge images" to combine them into a single MPEG slideshow, each frame shown for the Image Duration you chose. Choose "Video per image" to get a separate clip per file instead.
Yes. Your MOS file is uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. Files are never shared or made public, and there is no sign-up or watermark.