rocDecode environment variables

The following environment variables affect the rocDecode runtime.

Environment variable	Values
ROCDEC_LOG_LEVEL	Sets the maximum severity of log messages during decoding. The log level defines the maximum severity of log messages to output. 0: Output critical messages only (default) 1: Output critical and error messages 2: Output critical, error and warning messages 3: Output critical, error, warning and info messages 4: Output critical, error, warning, info and debug messages
ROCR_VISIBLE_DEVICES	Takes a comma-separated list of GPU indices. When set, the VAAPI decoder path parses this list before it falls back to HIP_VISIBLE_DEVICES.
HIP_VISIBLE_DEVICES	Comma-separated list of GPU indices. Parsed when ROCR_VISIBLE_DEVICES isn’t set.