" YUV420_SEMIPLANAR_ER VS. NV12 " Are they equvalant?

[jahwan.oh]

Hi,
In Argus camera I grab a frame, and it contains these info.

CUeglFrame:
width: 2608
height: 1964
depth: 0
pitch: 0
planeCount: 2
numChannels: 1
frameType: array
colorFormat: YUV420 semi-planar ER
cuFormat: uint8

in the CUDA documentation, the colour format is explained as below.

CU_EGL_COLOR_FORMAT_YUV420_SEMIPLANAR_ER = 0x26
Extended Range Y, UV in two surfaces (UV as one surface) with VU byte ordering, U/V width = 1/2 Y width, U/V height = 1/2 Y height.

and here is my question,

1. what is the extended Range here?

2. my video pipeline need to use NV12 format, I believe YUV420 semi-planar ER sounds like NV12.
   but then shouldn’t it be "UV byte ordering, U/V width = Y "width, U/V height = 1/2 Y height.??

for example take a look at the image below.(NV12). "UV block’s width is same as Y’s width.

3. then is therer something like YUV420_SEMIPLANAR_ER → NV12 conversion available?

Regards,

[ShaneCCC]

From the explain it’s the same format.

NV12 has a half width and half height chroma channel

[jahwan.oh]

ok, each V and U is actually half width and height. so it make sense.

but what about VU ordering? shouldn’t it be UV ordering?

Thank you.

[ShaneCCC]

Right, suppose it’s the same with NV21 instead of NV12