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Image MIME Reference
Panasonic-RAW-(RW2)

Panasonic RAW Image

image/x-panasonic-raw
VS

QuickTime Image Format

image/x-quicktime
QTIF

A complete technical comparison of Panasonic RAW Image and QuickTime Image Format — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature Panasonic-RAW-(RW2) QTIF
Transparency (Alpha) ✕ No Yes
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support Yes ✕ No
EXIF Metadata Yes ✕ No
ICC Color Profile Yes ✕ No
Panasonic RAW Image
image/x-panasonic-raw
Extension
.raw.rw2
Container TIFF-based (Proprietary)
Compression Uncompressed / Panasonic Proprietary Lossless
Algorithm
NoneProprietary Lossless
Color Depth 12-bit (Per Channel), 14-bit (Per Channel), 16-bit (Per Channel - High-res mode)
Developed by Panasonic Corporation
Released 2004
Magic Bytes
Older RAW: 49 49 2A 00 | Newer RW2: 49 49 55 00
Full Panasonic-RAW-(RW2) reference →
QuickTime Image Format
image/x-quicktime
Extension
.qtif.qti.qif
Container QuickTime Atom Container
Compression Varies (JPEG, SMC, Apple Video, Cinepak, Uncompressed)
Algorithm
QuickTime Image Compression Manager (ICM) Codecs
Color Depth 1-bit to 32-bit (Varies depending on the enclosed codec)
Developed by Apple Computer, Inc.
Released 1991
Magic Bytes
Varies (Typically begins with a 32-bit size integer followed by 69 64 73 63 ('idsc'))
Full QTIF reference →

Browser Support Comparison

Browser Panasonic-RAW-(RW2) QTIF
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
Panasonic-RAW-(RW2)

Panasonic-RAW-(RW2) Strengths

  • Retains maximum sensor data, allowing significant recovery of highlights and shadows compared to in-camera JPEGs
  • Modern RW2 files embed proprietary lens correction profiles (distortion, vignetting, chromatic aberration) that raw converters can automatically apply
  • The unique 'IIU' signature on RW2 files makes programmatic identification extremely reliable compared to other TIFF-spoofing raw formats
Limitations
  • Proprietary format requires continuous updates to third-party processing engines whenever Panasonic releases a new Lumix camera
  • Produces very large file sizes, particularly when using Panasonic's High-Resolution multi-shot modes
  • Cannot be directly embedded into web pages or used in standard HTML/CSS contexts
QTIF

QTIF Strengths

  • Extremely flexible architecture allowing it to encapsulate virtually any image compression algorithm available on the host machine
  • Supported 32-bit images with alpha channels (transparency) long before PNG became an established standard
Limitations
  • Fundamentally tied to Apple's deprecated QuickTime architecture, rendering the files almost entirely unreadable on modern systems without specialized legacy software or FFmpeg
  • The 'wrapper' nature of the format means that even if a parser can read the QTIF container, it may fail to render the image if it lacks the specific proprietary codec (like Apple SMC) used to compress the pixel data
  • Zero native support in modern web browsers

When to choose which format

Panasonic-RAW-(RW2)
Use Panasonic-RAW-(RW2) when…
  • Professional Digital Photography
  • Non-destructive Image Post-Processing
  • High Dynamic Range (HDR) Lumix Archival
QTIF
Use QTIF when…
  • Classic Mac OS Applications and Backgrounds
  • QuickTime VR Panorama Textures
  • 1990s CD-ROM Multimedia Assets

More comparisons

Panasonic-RAW-(RW2) vs ACES → QTIF vs ACES → Panasonic-RAW-(RW2) vs APNG → QTIF vs APNG → Panasonic-RAW-(RW2) vs AVCI → QTIF vs AVCI → Panasonic-RAW-(RW2) vs AVCS → QTIF vs AVCS → Panasonic-RAW-(RW2) vs AVIF → QTIF vs AVIF → All comparisons →
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