3FR to AVI Converter

3FR to AVI Converter

A .3fr file is the raw capture written by a Hasselblad medium-format camera — a single, very large, high-bit-depth sensor negative meant for editing in Hasselblad Phocus, Lightroom, or Camera Raw. AVI (Audio Video Interleave) is Microsoft's older video container, built on the RIFF chunk structure. This conversion takes one rendered 3FR photo and wraps it as a motionless frame inside an AVI, held on screen for a duration you set, with no audio. It is a narrow job: there is no motion in a single photo to extract, the raw is rendered permanently, and a medium-format frame's enormous resolution is downscaled to a video size. For a picture you actually want to view or print, convert 3FR to JPG instead and keep the .3fr as your master.

3FR Format at a Glance

AVI Format at a Glance

How to Convert 3FR to AVI

1. Upload Your 3FR File: Drag and drop your .3fr file onto the page or click "+ Add Files" to browse. You can queue several captures and process them with the same settings.
2. Set Duration and Merge strategy: Open Advanced Options. Use "Duration" to control how long the still shows — from a single frame up to 10 seconds per frame, with "5 seconds per frame" the default — and set "Merge strategy" to "Merge images" (combine several photos into one AVI) or "Video per image" (a separate file for each).
3. Pick Quality Preset, Resolution, and Background Color (Optional): Keep "Quality Preset" on "Very High (Recommended)", scale the very large raw dimensions down with the "Preset Resolutions" or "Width x Height" fields, and set a "Background Color" (Black by default) to fill any letterbox bars where the photo's shape doesn't match the output frame.
4. Convert and Download: Click "Convert" and download your AVI. No sign-up, no watermark.

Frequently Asked Questions

Does the AVI have any motion or sound?

No. From a single 3FR, the conversion renders one photo and shows it as a static image for the duration you set — there is no panning, zoom, animation, or transition, and the output carries no audio track. A still-image-to-video conversion writes no sound, so the audio codec option does not appear here. If you upload several captures and choose "Merge images," they play back to back, but each frame is still a static image held for its set duration.

Do I lose the 3FR's raw editing latitude when I convert to AVI?

Yes — completely. A .3fr is an unprocessed negative: white balance, exposure, highlight recovery, and tone are all still adjustable in Phocus or Lightroom. To put the photo into a video, the converter renders it first — demosaicing the sensor data and baking in the current white balance, exposure, and tone — then packages that frame into AVI. Once it is inside the AVI, the latitude is gone, exactly as it would be in a JPEG. Always keep the original 3FR as your master.

Does the medium-format resolution survive into the AVI?

Largely no, and this is the honest catch. A 3FR holds an enormous frame — roughly 39 MP up to 100-plus on current Hasselblad backs — but a video frame is sized for playback (for example 1920x1080), so the converter downscales the capture to fit. The fine detail that makes medium format worth shooting is mostly discarded in the resize. If your goal is to preserve that detail, stay with an image: convert 3FR to JPG keeps far more resolution than any standard video frame.

Which video codec does the AVI output use?

MPEG-4 by default. AVI is a container, not a codec, so it has to carry an encoded video stream inside it; for AVI output this converter defaults to MPEG-4 Part 2 — the MPEG-4 ASP family popularized by DivX and Xvid that AVI files have long carried. You can change it under "Show All Options" via the "Video Codec" dropdown, which lists other AVI-compatible choices. Because the source is a still photo, no audio stream is added.

When is 3FR to AVI actually the right choice — versus MP4 or JPG?

Rarely, and only by where the file will go. AVI is a legacy Microsoft container, so it makes sense mainly when a specific older Windows editing tool or archive process expects that exact wrapper — for example dropping a photo slate onto an AVI-era timeline. If you want a clip that plays on the widest range of phones, browsers, and editors, convert 3FR to MP4 is the safer video target. And if you only want a viewable picture rather than a video at all, 3FR to JPG is the right tool — far smaller and supported everywhere.

How are my files handled during conversion?

In our testing, a single rendered 3FR held for 5 seconds at the "Very High" preset produces a small AVI, since a motionless MPEG-4 frame compresses heavily once the medium-format capture has been downscaled to video size. Your file is uploaded over an encrypted connection, rendered and packaged into AVI 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, since 3FR captures can run well into the tens or hundreds of megabytes each, not your device.