Regarding access to decoded yuv

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hello,

Can I access directly decoded yuv using mmap?

Thank you.

3

Hi,
This looks to be duplicate of

The decoded buffers are in blocklinear. If you configure MMAP in capture plane, it calls the function internally:

blocklinear buffer -> NvBufferTransform() -> pitchlinear buffer -> NvBufferMemMap()

MMAP and DMABUF actually work identically.

1 Like
4

Can you tell me what blocklinear and pitchlinear mean?

As expected, NvBuffer is two-dimensional in shape.
Since the cpu buffer is one-dimensional, does this process go through?

If you can explain it with pictures, I think it will be quick to understand.

5

Hi,
For data order of pitch linear format, please check

NV12 is one Y plane and one UV-interleaved plane.

Detail about block linear is not open for public. Please always convert to pitch linear buffer for your usecase.