Board name: H2C-RPI-B01

HDMI interface to CSI-2 interface
Chip: TC358743XBG
Support TK1 full-featured expansion board
Support Raspberry Pi (linux kernel version to 4.0 or above)
Limited by the performance of Raspberry itself, up to 1080p@25
Physical size: 65x30 mm, fixed hole position is the same as zero.

https://www.aliexpress.com/item/4000152180240.html

https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=120702&start=400#p1339178

Lusya Upgraded version Raspberry Pi HDMI Adapter Board HDMI interface to CSI-2 TC358743XBG for 4B 3B 3B+ ZERO G11-011

/boot/config.txt

https://fluxcoil.net/hardwarerelated/raspberry_pi_4_tc358743

ensure that all options are enabled

   dtparam=i2c_arm=on
   dtparam=i2s=on
   dtparam=spi=on
   dtparam=i2c_vc=on
   dtparam=audio=on
   dtoverlay=vc4-fkms-v3d
   dtoverlay=dwc2
   dtoverlay=tc358743
   dtoverlay=tc358743-audio
   start_x=1
   gpu_mem=128 

setup

[    8.590920] tc358743 0-000f: tc358743 found @ 0x1e (bcm2835 I2C adapter)

root@pihdmi:/home/pi/CSI2_device_config# git remote -v
origin	https://github.com/6by9/CSI2_device_config (fetch)
origin	https://github.com/6by9/CSI2_device_config (push)

root@pihdmi:/home/pi/CSI2_device_config# cat edid.sh
v4l2-ctl --set-edid=file=1080P50EDID.txt --fix-edid-checksums

root@pihdmi:/home/pi/CSI2_device_config# sh -x edid.sh
+ v4l2-ctl --set-edid=file=1080P50EDID.txt --fix-edid-checksums

CTA-861 Header
  IT Formats Underscanned: yes
  Audio:                   yes
  YCbCr 4:4:4:             no
  YCbCr 4:2:2:             no

HDMI Vendor-Specific Data Block
  Physical Address:        3.0.0.0
  YCbCr 4:4:4 Deep Color:  no
  30-bit:                  no
  36-bit:                  no
  48-bit:                  no

CTA-861 Video Capability Descriptor
  RGB Quantization Range:  yes
  YCC Quantization Range:  no
  PT:                      Supports both over- and underscan
  IT:                      Supports both over- and underscan
  CE:                      Supports both over- and underscan

https://fluxcoil.net/hardwarerelated/raspberry_pi_4_tc358743

ustreamer

pi@pihdmi:~ $ git clone --depth=1 https://github.com/pikvm/ustreamer
pi@pihdmi:~ $ cd ustreamer/
pi@pihdmi:~/ustreamer $ make WITH_OMX=1
pi@pihdmi:~/ustreamer $ ./ustreamer --device=/dev/video0 -r 1280x720 --format=uyvy --encoder=omx \
>   --workers=3 --persistent --drop-same-frames=30 --host=0.0.0.0 --port=8080