REAL TIME VIDEO

It is provided a method, comprising, for each subset of a predefined group of subsets of pixels of an image sensor: retrieving a respective predefined correlation between positions of pixels in the respective subset and positions in a subframe corresponding to the respective subset based on an identification of the respective subset; extracting pixel values of pixels of the respective subset and storing the extracted pixel values in positions of the corresponding subframe according to the predefined respective correlation; transmitting the subframe corresponding to the respective subset and the identification of the respective subset when the extracted pixel values are stored in the corresponding subframe, irrespective of a transmission timing of any of subframes corresponding to other subsets of the group; wherein the number of the different subsets in the group is equal to or larger than 2.