Yes, Thailand is a Carnet country, and the Carnet must be obtained in your home country prior to arrival.
General Process
In Thailand, the process involves obtaining a Carnet de Passages en Douane (CPD) from a recognized issuing association in the home country. The Carnet serves as a guarantee for customs duties and taxes, allowing the temporary importation of equipment without paying duties or taxes.
If there is not a large amount of equipment, it is generally more efficient to bring it under an ATA Carnet and carry it along with the crew rather than shipping it as cargo.
Please note that a Film Board permit will be required for clearance at the Thailand airport.