V4l2 and get the temperature from video

[MADONOKOUKI]

Hi, I use purethermal and OK the v4l2-ctl setting.
We can select the format and I wonder which format can get the temperature with video.
I thought a dafault format of UYVY normalize the temperature automatically.
But I want to get the actual value of temperature If I can.

ioctl: VIDIOC_ENUM_FMT
Index : 0
Type : Video Capture
Pixel Format: 'UYVY'
Name : UYVY 4:2:2

Index : 1
Type : Video Capture
Pixel Format: 'Y16 '
Name : 16-bit Greyscale

Index : 2
Type : Video Capture
Pixel Format: 'GREY'
Name : 8-bit Greyscale

Index : 3
Type : Video Capture
Pixel Format: 'RGBP'
Name : 16-bit RGB 5-6-5

Index : 4
Type : Video Capture
Pixel Format: 'BGR3'
Name : 24-bit BGR 8-8-8