Video input converters. PAL/NTSC to MIPI CSI-2

[Tinkerlad]

Hi guys,

Got a quick question regarding IC selection. I am trying to add analogue video input to a raspberry pi like device for a project I am working on.

This device has a standard pi header, as well as the CSI input.
My analog video can be either NTSC or PAL.

My intent originally was to get a one chip solution to convert from PAL/NTSC to MIPI CSI. I found the ADV7280-M. This chip is perfect in all aspects bar one.... It costs AUD$14.66 in single quantity.....
The other thing with this chip is that it offers 8 analog inputs to switch between.... This is something I dont really need.....

I had considered using something like a TVP5150AM1 then a FPGA to translate the parallel  8-bit ITU-R BT.656 format into CSI. but am still new to this field and would have to spend a very long time working this out....

So my question is, has someone done something like this before and/or can recommend a cheaper option? I am open to using either CSI or another input method. I am also not objecting to using intermediary formats and multiple ICs.

Thanks, and I welcome your guys thoughts.

[NiHaoMike]

How about a USB video capture gadget?

[Tinkerlad]

How about a USB video capture gadget?

The problem I have with that is that the bandwidth is incredibly low... USB2.0 gives a theoretical maximum of 480Mb/s while CSI has a theoretical of 1Gb/s (realistically achieving ~800Mb/s) per lane. The device like the pi has two lanes available.

For PAL/NTSC at an 8bit resolution the video bandwidth alone is ~310Mb/s
At 10bits/pixel this goes to ~370Mb/s

As the device muxes all of the usb ports to a single port on the SoC this would limit me to 1 video stream maximum assuming nothing else is hogging usb bandwidth. This same problem arises on the Pi. This is shy I would like to use the CSI header....

[Cezane]

I'm also interested in the exact same solution. Did you find any other solution for video analog to CSI? or other IC than ADV7280-M?