This is a program to demonstrate the use of the Nvidia DALI python package.

It reads a series of frames from a specified video, and optionally performs a simple colour space conversion from BT.709 to BT.2020, or a hue shifting operation, while playing back the video, or when on a paused frame.

Clone this repository:

git clone https://github.com/icaven/dali_demo.git
cd dali_demo

Create a virtual environment to install the required python packages.
The DALI package currently requires CUDA version 11 or 12; please follow the installation instructions from the above link.

Other additional packages are required:

numpy
cupy
dearpygui

Use:

pip install -r requirements.txt

Sample videos are available from https://github.com/NVIDIA/DALI_extra. Please follow the installation instructions.

If this repository is cloned into the ~/Videos directory, then this demonstration program will find the default test video. Alternatively, set the DALI_EXTRA_PATH environment variable to the full path to where the DALI_extra directory is.