Environment variables

Environment variables that can be set to control some global settings of the NVIDIA® nvImageCodec library.

PYNVIMGCODEC_VERBOSITY

Level of logging, when using the Python API. Possible values are

1: Error 2: Warning 3: Info 4: Debug 5: Trace (only debug builds)

NVIMGCODEC_MAX_JPEG_SCANS

Maximum allowed number of progressive JPEG scans. Default value is 256. This limit is set to prevent a denial-of-service vulnerability via a crafted JPEG (see https://cure53.de/pentest-report_libjpeg-turbo.pdf)

NVIMGCODEC_MAX_IMAGE_SIZE

If specified, it imposes a maximum image volume size (in bytes). This setting is used to prevent malicious attacks where an encoded image can be crafted to represent large image dimensions that will cause an OOM error. If the maximum volume in bytes (height * width * num_channels * data_type_size) exceeds this value, an explicit error will triggered before attempting an allocation.