How to find fourcc value for "RGB 32" format

I have an HDMI/USB adaptor which can capture video as RGB/YUV. When I use AMCap, a famous Windows application to capture video, I can select format from “YUY2” and “RGB 32” and capture video successfully.
I want to capture video from this adaptor as RGB format by using Python(3.9) on Windows 10. So I wrote code below and confirmed that I can capture video as YUY2 to set fourcc value. But I don’t know apporopliate forcc for “RGB 32”. Could anyone tell me the fourcc value for “RGB 32”? or the way to find right fourcc value?

I’ve tried these value below, to no avail.
“8BPS”, "32 ", “RGB1”, "BIT ", “ABGR”, “ARGB”, “RGBA”, “BGRA”, "RAW ", "RGB ", "BGR ", “RGBT”, "DIB "

Format below can be set successfully.

import cv2

videoSource = 0

cv_cam_0 = cv2.VideoCapture(videoSource, cv2.CAP_DSHOW)
if not cv_cam_0.isOpened():
raise Exception(“video source: %s could not be opened” % (str(videoSource)))

fourcc = cv2.VideoWriter_fourcc(*“YUY2”) # OK to set.

fourcc = cv2.VideoWriter_fourcc(*“RGBT”) # NG to set.

ret = cv_cam_0.set(cv2.CAP_PROP_FOURCC, fourcc)

codec_char_code = int(cv_cam_0.get(cv2.CAP_PROP_FOURCC))

print(f"codec char:{codec_char_code}")

a = chr(0x000000FF & codec_char_code)
b = chr((0x0000FF00 & codec_char_code) >> 8)
c = chr((0x00FF0000 & codec_char_code) >> 16)
d = chr((0xFF000000 & codec_char_code) >> 24)

print("codec 4 char code: " + a + b + c + d)

if codec_char_code != fourcc:
print(f"Error. fourcc({fourcc}) cannot be set successfully.“)
print(f"fourcc({fourcc}) can be set successfully.”)