Multiplexing sensor data

The described techniques relate to a simulation system that multiplexes sensor data from multiple sensors and outputs the multiplexed sensor data in channels corresponding to the multiple sensors to appropriate vehicle systems at an appropriate time based on encoded timestamp data. In examples, a multiplexer may receive sensor datasets associated with different sensors. The multiplexer may encode the different sensor datasets with timestamp data and supplemental data to generate an encoded dataset. The multiplexer may output the encoded dataset to a video output port to transmit the encoded dataset to a demultiplexer. The demultiplexer receives the encoded dataset from the video output port, and separates the encoded dataset into channels corresponding to the sensors from which the sensor data was received. The demultiplexer may output the datasets in the respective channels at a time (or times) indicated in the timestamp data and according to the supplemental data.