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Getting Started

Installation

The software can be downloaded here: https://gum.co/pycocs.

You can extract the .zip and place it anywhere you want. The software is self-contained and doesn't need to be "installed".

To launch it simply click on the .exe inside the directory.

(you cannot move the .exe outside the directory to put it somewhere else)

Import files

You can simply drag & drop any supported file(s) or even just a folder. You can also click on the folder icon to open files through your OS explorer.

When dragging a folder all the files inside it and its sub-directories will be added!

Drag & Drop import demo

To delete a file you can simply select it and press Del or Backspace .

Set the IDT

The IDT (Input Device Transform) specifies the input file colorspace primaries, white point and transfer-function.

For exampleUtility-sRGB-Texture specifies that the file has sRGB primaries with the sRGB EOTF transfer function while Utility-sRGB-Linear specifies that the transfer function is Linear.

To apply an IDT to the desired files:

  • Select one or multiple files in the list (shift+click)
  • Select the desired IDT in the dropdown menu.
  • Click on Apply to Selection / Apply to All (No selection is needed for this one)

Change IDT demo

You can also click & drag down/up to select multiple files quickly in the list.

Change Output options

Select the colorspace to convert file primaries to in the dropdown.

If the IDT and Target Colorspace are the same no conversion will happen.

Select your output format

exr

The professional-grade image storage format of the motion picture industry to be used in your 3D applications for input such as textures, HDRIs, etc but not for your final displayable-delivery-content.

jpg, png

Low dynamic range displayable file formats suitable for online-view , previews, thumbnails, etc. A Transfer-function / ODT is required to be applied.

Select your bitdepth

(output format dependent)

Warning

When converting HDRIs it is recommended to output a 32bit float file to not clip any values

Pick your compression method

(exr only)

  • None: No compression, for archive files mostly. Or if you need maximum reading speed.

  • PIZ: (lossless) Same speed for decompression/compression. Best for scan-line based files.

  • Zip: (lossless) faster decompression and slower compression than PIZ. Best for textures.

  • Zips: (lossless) Same, but can be write/read faster in some software.

  • Dwaa: (lossy) Produce very light files (default compression amount: 45)

  • Dwab: (lossy) Same as above, but can generate faster result in some applications.

  • B44: (lossy) Only for HALF-Float images. Best for real-time playback of image sequence.

Read more about this here: https://www.exr-io.com/openexr-data-compression/.

Set the compression amount.

(output format & compression method dependent)

  • jpg: 100 = Max Quality; 0 = Minimum quality, but light files
  • exr(dwaa/dwaab): 0 means Max quality

Select your output location option.

Refer to the Functionalities page.

Start The Conversion

Click on the green "play" button in the toolbar to start converting. When a file is converted, it will be removed from the list. If you click on "Abort", the currently converted files will still be converted.

conversion demo

Examples

Importing a 3d render in .exr, rendered with ACEScg primaries and applying an ODT for sharing on Internet:

  • IDT: ACEScg ;

  • TargetColorSpace: ACEScg ;

  • Output format: .jpg ; Compression: 100 (max quality) ;

  • ODT: sRGB(ACES)

Importing a albedo texture in .exr from Megascans (sRGB primaries) and convert it to ACEScg:

  • IDT: Utility - Linear- sRGB ;

  • TargetColorSpace: ACEScg ;

  • Output format: .exr; BitDepth: 16b Half-Float; Compression: zip;