filmkit.eggrice.soy

FilmKit

Browser-based preset manager and RAW converter for Fujifilm X-series cameras for desktop and mobile.

Desktop


Android

This is author's cat. Shoutout to Fuji X Weekly for awesome presets!

Features

Note that the app is in BETA. It's currently tested on X100VI only. It likely works with other X-series cameras that support Fujifilm's RAW conversion protocol (X-T5, X-H2, X-T30, etc.), but this has not been verified. If you have a different camera and want to help, see Supporting New Cameras below.

Just like Fujifilm X RAW STUDIO, FilmKit uses WebUSB to connect directly to your camera, your camera's own image processor handles the conversion. FilmKit is a static client-side app, hosted on Github Pages.

• Camera Preset Management - Read, edit and write custom presets on your camera. The iteration should be significantly faster than X RAW STUDIO, thanks to better camera work queue management, non-locking UI and auto-conversion toggle.
• Local Preset Library - Save presets in your computer, drag & drop between camera and local storage.
• RAW Conversion and Live Preview - Select a RAF file, adjust film simulation parameters, and get back a full-quality JPEG processed by the camera.
• Preset Detection - Loading a RAF file automatically detects which preset was used to shoot it (temporary profile created if not present).
• Preset import/export - Import or export presets as file, link or text paste.
• Quick compare - QUickly compare between original and current preset.
• Mobile support - Easily manage presets on-the-go using your phone.
• Zero installation and cross-platform (supports Linux).

Requirements

Browser that supports WebUSB, this includes Chromium-based browswer like Google Chrome on desktop and Android.

Appropriate udev rule required if the browser is running in Flatpak, ex:

SUBSYSTEM=="usb", ATTR{idVendor}=="04cb", MODE="0666"

How It Works

FilmKit communicates PTP (Picture Transfer Protocol) over USB, the same protocol that X RAW STUDIO uses. The camera does all the heavy lifting: it receives the RAF file and conversion parameters, processes them, and returns a JPEG.

For preset management, FilmKit reads and writes individual preset properties (D18E–D1A5) using standard PTP GetDevicePropValue / SetDevicePropValue operations.

See QUICK_REFERENCE.md for full protocol documentation.

Reverse Engineering

FilmKit's protocol implementation was built with the following reference materials:

• rawji
• fudge
• libgphoto2
• Wireshark USB captures: communication between X100VI and X RAW Studio were captured using Wireshark (on Windows with USB capture) to reverse-engineer preset property encoding, write ordering, and conditional write behavior (ex. HighIsoNR uses a proprietary non-linear encoding, Color Temperature can only be written when WB mode is set to Color Temp, monochrome film simulations reject Color writes).

The camera's native d185 profile format (625 bytes) uses different field indices and encoding from the format in RAF files. FilmKit uses a patch-based approach: copy the base profile byte-for-byte, only overwrite fields the user changed, to preserve EXIF sentinel values.

Supporting New Cameras

FilmKit has only been tested on the X100VI. If you have a different Fuji X-series camera and want to help expand support, you can capture USB traffic with Wireshark:

How to capture

1. Install Wireshark with USBPcap (or equivalent for macOS)
2. Open Wireshark and start capturing on the USB bus your camera is connected to (ex. USBPcap1:\\.\USBPcap1)
3. Open Fujifilm X RAW Studio, and perform one of the following actions you want to capture:
   • Profile read: Just connect and let the app read the camera state
   • Preset save: Change all preset values and save it to one of the profile slots
   • RAW conversion: Load a RAF and convert with one of the presets (local or on-camera)
4. Stop the capture and save as .pcapng
5. Repeat from 3 for another action.

Filter Wireshark with usb.transfer_type == 0x02 (bulk transfers) to see only PTP traffic.

What to share

Open an issue on GitHub with:

• Your camera model and firmware version
• What you captured (please capture all three)
• The .pcapng files
• The parameter values you used (so we can correlate bytes to settings)

Additional captures may be required with various property values (ex. for ranged-based value, typically preset save or profile read of min/max values are good enough, but we may face another case of HighIsoNR weirdness).

Contributing

This project does not accept any pull requests.

What is welcome:

• Bug reports via Issues
• Feature requests via Issues
• Camera compatibility reports with Wireshark captures (see Supporting New Cameras)

Bug Reports

When filing a bug report, please include:

1. Your camera model and firmware version
2. Steps to reproduce the issue
3. The debug log - scroll down to the Debug section at the bottom of the right sidebar, click Copy Log, and paste it into the issue

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Made with ♥ by eggricesoy · @eggricesoy