User Manual

Operation of the Camera 127
Sensor Mode Resolution
3.2K (3168 x 1782)
6:5 2.6K (2578 x 2160)
4:3 2.8K (2880 x 2160)
Open Gate 3.4K (3424 x 2202)
The camera will automatically calculate a CRC32C checksum for the image data
inside each ARRIRAW frame. This checksum is recorded onto the SXR Capture Drive
or XR Capture Drive where Codex software uses it to verify the image content during
all copying and processing steps. In addition to providing extra security, this also
speeds up the copying process.
The checksum is also stored in the ARRIRAW header as metadata (fields
'ImageDataChecksumType' and 'ImageDataChecksum'), making it thus available to
third parties. Note that this checksum does not validate the entire .ari file, only the
image data itself.
Choosing a Recording Format
The selection of the recording format is a crucial decision which needs to be
discussed with the production company and post production. While lower bit rate
codecs offer longer recording times, they introduce compression artifacts that greatly
limit the creative choices.
ProRes 422 Use for basic television production. Limited options in
color correction.
ProRes 422 HQ Use for high quality TV production. Suitable for creative
color correction.
ProRes 4444 Use for high quality TV and cinema production. Very
suitable for creative color correction and visual effects
work such as pulling mattes.
ProRes 4444 XQ The ideal choice for productions that are shooting for
premium image quality, are looking for extreme color
grading and want to preserve the superior tonal range of
ALEXA's Log C signal.
ARRIRAW Use for cinema production, visual effects and high qual-
ity TV. Best format for creative color correction and visu-
al effects work. Unencrypted and uncompressed format.
Raw data needs to be processed into color images.
Always test the full workflow pipeline with the preferred recording format before
shooting.
Media preparation
The typical usage cycle of recording media is:
1 Format
2 Record
3 Copy
4 Back up