Framebuffer to DCIM and TFT Display. What is the best kind of RAM?

Dear friends.

I am starting a new hardware designer for a project with the STM32H753 MCU.

The project is a picture grabber and video recorder by infrared trigger. A display will be used to show the images/video using TouchGFX framework and the pictures/movies will be written in a SD card. The device is portable, powered by a lipo battery.

The camera has PIXEL_CLOCK = 74.25MHz and the desired output is 1920 x 1080p / 30 fps. The output image is YCbCr 422 format.

My doubt is about the kind of memory to project a reliable framebuffer for this application. I need a dual framebuffer. Each one with 4MB. Considering 30 fps to recorder a video I will need a memory with a bandwidth of 120MB/s.

So, my memory should be at least 64Mbits of space and 120MB/s of throughput.

Unfortunately, the STM32H753 have no OCTA-SPI to interface HyperBus memories. And by FMC we have several options, like PSRAM, SDRAM, SRAM …

Therefore, I have 2 issues:

-         Could some one to suggest some RAM model for this application? I am a little confused about the possible model (PSRAM or LPDRAM or conventional SDRAM)

-         Is the MCU powerful enough to reach the requirements of project?

Thank you in advance.

Best Regards,

Kunde