git clone https://github.com/dnglab/dnglab.git
cd dnglab
cargo build --release

dnglab convert IMG_1234.CR3 IMG_1234.DNG

dnglab convert ~/DCIM/100EOS ~/filmrolls/photos-france

dnglab-convert
Convert raw image(s) into dng format

USAGE:
    dnglab convert [OPTIONS] <INPUT> <OUTPUT>

ARGS:
    <INPUT>     Input file or directory
    <OUTPUT>    Output file or existing directory

OPTIONS:
        --artist <artist>
            Set the artist tag

    -c, --compression <compression>
            Compression for raw image [default: lossless] [possible values: lossless, none]

        --crop <crop>
            DNG default crop [default: best] [possible values: best, activearea, none]

    -d
            turns on debugging mode

        --dng-preview <preview>
            DNG include preview image [default: true]

        --dng-thumbnail <thumbnail>
            DNG include thumbnail image [default: true]

        --embed-raw <embedded>
            Embed the raw file into DNG [default: true]

    -f, --override
            Override existing files

    -h, --help
            Print help information

        --image-index <index>
            Select a specific image index (or 'all') if file is a image container [default: 0]

        --ljpeg92-predictor <predictor>
            LJPEG-92 predictor [default: 1] [possible values: 1, 2, 3, 4, 5, 6, 7]

    -r, --recursive
            Process input directory recursive

    -v
            Print more messages

dnglab-analyze
Analyze raw image

USAGE:
    dnglab analyze [OPTIONS] <FILE>

ARGS:
    <FILE>    Input file

OPTIONS:
    -d                          turns on debugging mode
        --full-pixel            Write uncompressed full pixel data to STDOUT
    -h, --help                  Print help information
        --json                  Format metadata as JSON
        --meta                  Write metadata to STDOUT
        --preview-checksum      Write MD5 checksum of preview pixels to STDOUT
        --preview-pixel         Write uncompressed preview pixel data to STDOUT
        --raw-checksum          Write MD5 checksum of raw pixels to STDOUT
        --raw-pixel
        --srgb                  Write sRGB 16-bit TIFF to STDOUT
        --structure             Write file structure to STDOUT
        --summary               Write summary information for file to STDOUT
        --thumbnail-checksum    Write MD5 checksum of thumbnail pixels to STDOUT
        --thumbnail-pixel       Write uncompressed preview pixel data to STDOUT
    -v                          Print more messages
        --yaml                  Format metadata as YAML

find /cr3samples/ -type f -name "*.CR3" -exec dnglab analyze --structure '{}' --json \; | \
  jq ". | { file: .file.fileName, cfa_layout: .format.cr3.moov.trak[1].mdia.minf.stbl.stsd.craw.cmp1.cfa_layout}"

dnglab-extract
Extract embedded original Raw from DNG

USAGE:
    dnglab extract [OPTIONS] <FILE> <INPUT> <OUTPUT>

ARGS:
    <FILE>      Input file
    <INPUT>     Input file or directory
    <OUTPUT>    Output file or existing directory

OPTIONS:
    -d                  turns on debugging mode
    -f, --override      Override existing files
    -h, --help          Print help information
    -r, --recursive     Process input directory recursive
        --skipchecks    Skip integrity checks
    -v                  Print more messages

Lowlevel command to make a DNG file

Usage: dnglab makedng [OPTIONS] --input <INPUT>...

Options:
  -d...
          turns on debugging mode

  -o, --output <OUTPUT>
          Output DNG file path

  -i, --input <INPUT>...
          Input files to merge into a single DNG file. Usually only a single input file is used.
          If multiple input files are given, --map should be used to specifiy how to interpret each intput file.

  -v
          Print more messages

      --map <map>...
          When multiple input files given, each input file should be mapped to a specific type of data.
          First input file starts with index 0. Possible types are 'raw', 'preview', 'thumbnail', 'exif', 'xmp'.
          Input files which are not mapped are ignored.

          [default: 0:raw 0:preview 0:thumbnail 0:exif 0:xmp]

      --dng-backward-version <version>
          DNG specification version

          [default: 1.4]
          [possible values: 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6]

      --colorimetric-reference <reference>
          Reference for XYZ values

          [default: scene]
          [possible values: scene, output]

      --unique-camera-model <id>
          Unique camera model

      --artist <artist>
          Set the Artist tag

      --make <make>
          Set the Make tag

      --model <model>
          Set the Model tag

      --matrix1 <MATRIX>
          Matrix 1

          [possible values: XYZ_sRGB_D50, XYZ_sRGB_D65, XYZ_AdobeRGB_D50, XYZ_AdobeRGB_D65, "custom 3x3 matrix (comma seperated)"]

      --matrix2 <MATRIX>
          Matrix 2

          [possible values: XYZ_sRGB_D50, XYZ_sRGB_D65, XYZ_AdobeRGB_D50, XYZ_AdobeRGB_D65, "custom 3x3 matrix (comma seperated)"]

      --matrix3 <MATRIX>
          Matrix 3

          [possible values: XYZ_sRGB_D50, XYZ_sRGB_D65, XYZ_AdobeRGB_D50, XYZ_AdobeRGB_D65, "custom 3x3 matrix (comma seperated)"]

      --illuminant1 <ILLUMINANT>
          Illuminant 1

          [possible values: Unknown, A, B, C, D50, D55, D65, D75]

      --illuminant2 <ILLUMINANT>
          Illuminant 2

          [possible values: Unknown, A, B, C, D50, D55, D65, D75]

      --illuminant3 <ILLUMINANT>
          Illuminant 3

          [possible values: Unknown, A, B, C, D50, D55, D65, D75]

      --linearization <TABLE>
          Linearization table

          [possible values: 8bit_sRGB, 8bit_sRGB_invert, 16bit_sRGB, 16bit_sRGB_invert, 8bit_gamma1.8, 8bit_gamma1.8_invert, 8bit_gamma2.0, 8bit_gamma2.0_invert, 8bit_gamma2.2, 8bit_gamma2.2_invert, 8bit_gamma2.4, 8bit_gamma2.4_invert, 16bit_gamma1.8, 16bit_gamma1.8_invert, 16bit_gamma2.0, 16bit_gamma2.0_invert, 16bit_gamma2.2, 16bit_gamma2.2_invert, 16bit_gamma2.4, 16bit_gamma2.4_invert, "custom table (comma seperated)"]

      --wb <R,G,B>
          Whitebalance as-shot

      --white-xy <x,y>
          Whitebalance as-shot encoded as xy chromaticity coordinates

          [possible values: D50, D65, "custom x,y value (comma seperated)"]

  -f, --override
          Override existing files

  -h, --help
          Print help (see a summary with '-h')