1. A method for determining numbers of bits to use to encode binarized video data, the method comprising: receiving a bin string representative of the binarized video data, the bin string including bins that each store a symbol; determining whether the symbol stored in each bin of the bin string is a most probable symbol of a probability model available for encoding the binarized video data; responsive to determining that the symbol stored in each bin of the bin string is the most probable symbol, updating the probability model based on a size of the bin string to determine a first number of bits to use to encode the binarized video data; and subsequent to updating the probability model based on the size of the bin string to determine the first number of bits to use to encode the binarized video data, encoding the binarized video data to a bitstream using the first number of bits.