Such a mod can have a neutral picture with 10+ bits and 4:2:2 maybe.

A similar mod, would be to output raw video frames to a flash drive via USB (3).

Feature Summary:

• 4K Ultra HD video recording @ 30 fps.
• High definition video recording at 720p @ 240fps and 1080p @ 120fps.
• Burst mode support for still image capture of over 700 Megapixels per second.
• Multi-exposure High Dynamic Range (HDR) imaging support, including local tone mapping, preserves image details in high contrast scenes.
• Electronic Image Stabilization (EIS) with rolling shutter correction.
• 3D Motion-Compensated Temporal Filtering (MCTF) with de-ghosting for reduced artifacts and low light performance.
• Support for applications including wireless preview, playback, and upload of stills and videos to a smartphone or directly to the Internet over WiFi.
• Interfaces such as DDR3L, USB 2.0 host, HDMI, and SDXC SD card.
• Low power – <1W for 1080p60 encode, <2W for Ultra HD 4K encode.

The A9 Camera Development Platform contains the necessary tools, software, hardware and documentation to develop a state-of-the-art network-enabled Ultra HD camera design.

Hardware Platform:

• Main board with A9 and sensor board with C/CS mount lens
• Sensor: Aptina, OmniVision, Samsung, Sony--many choices available Software Development Kit (SDK)
• Royalty-free libraries for ISP, 3A, and codecs
• Demonstration DV/DSC camera application with full source code
• Extensive and fully documented middleware API library suite Documentation
• Programmer's guide, application notes, API documents
• SoC data sheet, BOM, schematics and layout files

Official announcement: http://www.ambarella.com/news/33/74/Ambarella-Introduces-4K-Ultra-HD-Video-for-Next-Generation-Mirrorless-Sports-and-Digital-Still-Cameras.html

Product info PDF - http://www.ambarella.com/uploads/docs/A9-product-brief.pdf

Other pages about the Ambarella A9:

• http://www.anandtech.com/show/6652/ambarella-announces-a9-camera-soc-successor-to-the-a7-in-gopro-hero-3-black