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SoC suggestion for video processing system

We have a new requirement for  Video monitoring & Processing system. The requirement for the processor are given below. Please suggest us the best processor or SoC you have to meet the below requirement.
-ARM9 processor
-1,2Ghz Quad-core processor
-2Gb DRAM memory interface
-4Gb Flash memory interface ( NAND)
-Micro SD Card interface
-Micro USB interface
-SPI Interface
-I2C Interface
-Ethernet MAC ( 10/100Mbps at least)
-UART or USART interface
-Camera Interface should support camera with 12MP capable of 1080p@60fps ( CSI interface)
-Speaker & mic connectivity.
-OS should be Linux with big-endian architecture.
-Very low power consumption.
-No Heat sink or Fan requirement for the processor. Since the product should be very small in size.