NVIDIA VPI error when wrapping CUDA memory

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX1
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1

Hi,
I’m trying to use the NVIDIA VPI library to wrap some CUDA memory with the vpiImageCreateCudaMemWrapper function. However, when the wrapped image has a stride that is not multiple of 256 it gives the following warning/error (where 512 is replaced with the next multiple of the 256 for the current width, in my case I’m using 320):

sValidateSurfacePitch: Pitch must be greater than or equal to 512 and must be a multiple of 256
NvMediaEglValidateLocalTVMROutputSurface: Pitch validation failed
NvMediaEglFillLocalImageSurface: NvMediaEglValidateLocalTVMROutputSurface failed
NvMediaEglStreamConsumerAcquireCommon: Acquire: EGLExports.stream2.consumer.publicStateGet failed (4)
[WARN ] 2020-11-20 09:41:21 src/private/mem/img/Mapping_CUDAPitch_NvMediaImage.cpp:149 (cudaEGLStreamProducerReturnFrame:cudaErrorUnknown)
[NvMediaEglStreamConsumerAcquireImage:967] Consumer acquire failed: 7

Besides this warning, the program still works fine, and the image processing looks good.

My question is if this is still a valid error, a performance issue, or if it could lead to some undefined behavior I’m not aware of, since the function documentation does not say anything about it.

3

Hi,

The error comes from EGL driver.
Please make sure the pitch to be the multiple of 256 and >= 512.

Thanks.

4

Ok thanks, but what effects may cause this error? Because currently it seems that it is not affecting anything, since the processing looks fine.

5

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks

Hi,

Not sure if there is any fallback mechanism in the VPI or EGL stream.
To check it further, could you share a complete sample to reproduce this with us?

Thanks.