In simplest terms, XAVC S can be defined as the subset format of the XAVC format. Introduced by Sony, the XAVC recording format that is licensed to the companies willing to create XAVC products. The subset format XAVC S is capable of supporting 4K videos with a resolution of up to 3840 X 2160 and uses MP4 as its container format. For the audio, AAC or LPCM is used by the format. Some of the popular Sony devices that support the XAVC S format include the Sony FDR-AX100 4K Ultra HD consumer camcorder, action camera- Sony HDR-AS100V, and others.