What is the R3D file format?
.r3d files are used by high-definition digital cinema cameras made by RED Digital Cinema, capable of recording at 4K, 6K, and 8K resolutions.
Files with the .r3d extension store raw sensor data captured with RED cameras. Frames are encoded using the REDCODE wavelet-based compression codec at a selectable compression ratio - from near-lossless 2:1 up to 22:1 - so the footage retains far more detail than conventionally compressed video formats. Long recordings are automatically split into multiple numbered .r3d segments (for example A001_C001_001.R3D, _002.R3D) that together form one continuous clip.
RED cameras are used mostly in cinematography and broadcast production. In 2007 the first model in the series, Red One, introduced capturing video at 4K resolution. The emergence of cameras using the .r3d format revolutionized digital cinematography. By 2018 RED had introduced bodies capable of recording video at 8K resolutions, far exceeding the earlier 4K standard. Each .r3d clip stores Bayer pattern sensor data, which means color rendering, white balance, and ISO are decided non-destructively in post-production rather than baked into the file. Look and metadata settings travel alongside the clip in a sidecar .rmd file, keeping the original sensor data untouched.
Because .r3d is an acquisition format rather than a delivery format, finished projects are exported to containers such as .mov or .mxf before distribution. To work with .r3d footage, a 4K or higher monitor is recommended to fully appreciate the fidelity that the raw capture provides.
Security & safety
RISK: LOWAn R3D is camera footage data, not an executable, so opening it is low risk. The real concerns are practical: files are huge (manage storage), a clip is spread across numbered .R3D segments plus a sidecar .RMD that must travel together, and decoding RAW is CPU/GPU-heavy. Always keep the camera-original .R3D as the master and grade non-destructively; export copies for delivery rather than altering the source.
Format details
in a nutshellPrograms that open R3D files
Windows4 apps
Adobe Premiere Pro
Paid Import the .R3D directly; Premiere reads REDCODE RAW with adjustable source settings (RED SDK built in). 
REDCINE-X Pro
Free RED's free reference app: import the .R3D to play, grade the RAW, and export to MOV/MP4/DPX. Best starting point. 
DaVinci Resolve
Freemium Import the .R3D into the media pool; Resolve decodes REDCODE RAW natively for editing and grading (free version handles most R3D). 
macOS3 apps
Apple Final Cut Pro
Paid Install RED's Apple ProRes RAW / RED plug-in, then import the .R3D to edit natively.
DaVinci Resolve
Freemium Import .R3D into the media pool; native REDCODE RAW decode for grading on macOS. 
Linux1 app
DaVinci Resolve (Linux)
Freemium On supported Linux, Resolve decodes .R3D via the RED SDK for editing/grading. Technical details
deep spec| Developer | RED Digital Cinema |
| Format type | Proprietary compressed RAW digital-cinema clip container |
| MIME type | video/x-red-r3d |
| File signature | "RED2" (hex 52 45 44 32) at byte offset 0 |
| Compression | REDCODE wavelet-based, selectable ratio 2:1 to 22:1 (visually lossless to higher compression) |
| Color encoding | 16-bit linear Bayer RAW sensor data per frame |
| Dynamic range | Up to approximately 16 stops of exposure latitude |
| Maximum resolution | Up to 8K+ (e.g. 8192×4320 on MONSTRO/V-RAPTOR sensors) |
| Byte order | Big-endian binary |
| Audio | Embedded uncompressed PCM (when recorded on-camera) |
| Clip segmentation | Long recordings automatically split into numbered `.r3d` segments (~4 GB each) |
| Metadata sidecar | `.rmd` file holds non-destructive color grade, look, and clip metadata |
| Camera generations | RED ONE, EPIC, DRAGON, WEAPON, HELIUM, MONSTRO, KOMODO, V-RAPTOR; latest codec generation labelled R3D NE |
| Supported platforms | Windows, macOS, Linux (via RED SDK and DaVinci Resolve) |
| Released | 2007 (RED ONE camera) |
| Latest version | REDCODE RAW (ongoing; R3D NE / newer codec generations through 2020s RED cameras) |
| Specification | www.red.com |
R3D conversions
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