This PCB is based on the sdtv2csi design (https://github.com/rniwase/sdtv2csi) and is made specifically for the Raspberry Pi Zero, but also works great with the Pi 3 and 4. It features the ADV7280 video decoder, which converts analog video signals (CVBS, S-Video) into digital formats. Works great for video capture or streaming.

The github page contains a Lua script to configure the ADV7280 input and parameter via i2c and also provide a ffmpeg script to capture the input,

There are two user-programmable buttons for extra control and customization.