1. A video compression system comprising: a first memory device; a dual-port second memory device; a third memory device; a first processor configured to read video data from the first memory device, to process the read video data in a manner altering the read video data according to a first video compression process, and to write data processed by the first processor to the dual-port second memory device; and a second processor configured to read video data processed by the first video compression process from the dual-port second memory device while the first processor is writing processed data to the dual-port second memory device, to process the data read by the second processor in a manner altering the read video data according to a second video compression process, and to write the data processed by the second processor to the third memory device.