Abstract: System for determining gas permeability (O2, CO2, N2, air) in films, especially edible films, wherein the system comprises a receptacle (A) containing a liquid of low solubility to the gas that is not reactive to it or dissolves the film; gas bubble generating means comprising a cylinder that contains the gas (G); a driver (E) that regulates gas flow and drives the syringe plunger (F); an image acquisition system comprising a high resolution camera (C); lighting (B) that uses a lighting means; and image processing means, preferably a computer program (D); and a method that comprises placing the liquid in an receptacle and letting the gas (G) flow, generating uniform bubbles in the liquid, and placing the film over the liquid; taking photographs or images for a determined time range and frequency and with an auxiliary lighting means; processing photographs or images in an image processing means, and determining variation in the bubbles volume at different times, wherein the bubble volume is determined based on