NvDdkVicConfugure failed, nvbuffer_transform Failed

[ysyyork]

I’m using the below code to resize NvBuffer

bool PreviewConsumerThread::doResize(int inputFd, int *outputFdPtr) {
        /* create resize NvBuffer */
        NvBufferCreateParams resizeBufParams = {0};
        int32_t resizeWidth = RESIZE_SIZE.width();
        int32_t resizeHeight = RESIZE_SIZE.height();

        resizeBufParams.payloadType = NvBufferPayload_SurfArray;
        resizeBufParams.width = resizeWidth;
        resizeBufParams.height = resizeHeight;
        resizeBufParams.layout = NvBufferLayout_Pitch;
        resizeBufParams.colorFormat = NvBufferColorFormat_ABGR32;
        resizeBufParams.nvbuf_tag = NvBufferTag_NONE;

        if (-1 == NvBufferCreateEx(outputFdPtr, &resizeBufParams)) {
            printf("Failed to create resize NvBuffer\n");
            return false;
        }


        /* do resize */
        NvBufferTransformParams resizeTransParams;
        memset(&resizeTransParams, 0, sizeof(resizeTransParams));
        resizeTransParams.transform_flag = NVBUFFER_TRANSFORM_FILTER;
        resizeTransParams.transform_filter = NvBufferTransform_Filter_Bilinear;

        if (-1 == NvBufferTransform(inputFd, *outputFdPtr,
                                    &resizeTransParams)) {
            printf("Failed to convert the resize buffer\n");
            return false;
        }

        return true;
    }

it works well if my target size is > 240x136. If width is <= 240 or height <= 136, it will just throw

NvDdkVicConfigure Failed
nvbuffer_transform Failed

My input image is 3864x2180, I roughly calculated the ratio is around 16 for both width and height. Is this a hard limit for the algorithm? When I’m using opencv resize with bilinear interpolation, it’s ok to resize to any image size. Not sure what’s the rationale behind this implementation.

[ysyyork]

Also tried nearest interpolation, it’s the same.

[DaneLLL]

Hi,
Yes, this is the constraint of hardware converter. The ratio of downscaling cannot exceed 16.

[ysyyork]

Hi, what’s the recommended way to do downsample when the ratio exceed 16? firstly downsample to 1/16 and then do another downsample?

[DaneLLL]

Hi,
Doing downsampling twice should work. To get optimal performance, you can run VIC at max clock by referring to this post:
Nvvideoconvert issue, nvvideoconvert in DS4 is better than Ds5? - #3 by DaneLLL

[ysyyork]

Cool, interesting. So when I’m doing NvBuffer resize, it’s actually directly using VIC? apart from what you mentioned in the link, I don’t need to change any code correct?