NvBufferTransform Failed on Jetson AGX Xavier

[alexander.karpov]

Hello, sometimes get this message while running a gstreamer pipeline with nvvideo4linux2 elements on Jetson AGX Xavier with Jetpacks 4.4 and 4.6:

SYNC_IOC_FENCE_INFO ioctl failed with 9
NvDdkVicExecute Failed
nvbuffer_transform Failed
NvDdkVicExecute Failed
nvbuffer_transform Failed
gst_nvvconv_transform: NvBufferTransform Failed 
gst_nvvconv_transform: NvBufferTransform Failed 
SYNC_IOC_FENCE_INFO ioctl failed with 9
NvDdkVicExecute Failed
nvbuffer_transform Failed
gst_nvvconv_transform: NvBufferTransform Failed 

It looks like something bad happens while transferring DMA buffer:

NvBufferTransformParams transform_params;

memset(&transform_params, 0, sizeof(NvBufferTransformParams));

if (!gst_buffer_map (src, &inmap, GST_MAP_READ))
  goto invalid_buffer;

retn = ExtractFdFromNvBuffer (inmap.data, &input_dmabuf_fd);
if (retn != 0) {
  GST_ERROR_OBJECT(src, "ExtractFdFromNvBuffer Failed");
  gst_buffer_unmap(src, &inmap);
  return GST_FLOW_ERROR;
}

inmemory = (GstV4l2Memory *)gst_buffer_peek_memory (dest, 0);

retn = NvBufferTransform (input_dmabuf_fd, (gint)inmemory->dmafd, &transform_params);
if (retn != 0) {
  GST_ERROR_OBJECT(src, "NvBufferTransform Failed");
  gst_buffer_unmap(src, &inmap);
  return GST_FLOW_ERROR;
}

Didn’t get this part clearly, but supposedly it happens due some lack of memory or something.

Is it possible somehow handle this issue without breaking a pipeline?

I can’t provide any gst-launch command, because this issue can’t be reproduced without an app which creates this pipeline and use it some complex scenarios (actually there are multiple pipelines created for a multiple streams).

[kayccc]

Sorry for the late response, is this still an issue to support? Thanks

[alexander.karpov]

Yes, the issue is still present, didn’t get much progress on it.

[DaneLLL]

Hi
There is a sample code for accessing NvBuffer in appsink. Please take a look at
How to run RTP Camera in deepstream on Nano - #29 by DaneLLL

See if you can resolve the issue by referring to it.

[alexander.karpov]

Thanks, but the code above is from gst-v4l2 which is a part of sources provided by Nvidia. And the app I’m talking about just use nvvideo4linux2 as it is.

And for now it looks like some resources race for me. I get SYNC_IOC_FENCE_INFO ioctl failed with some code in different scenarios sometimes.

Are there any chances to get info what these codes literally mean?

[DaneLLL]

Hi,
There is a python sample in
Nvv4l2decoder sometimes fails to negotiate with downstream after several pipeline re-launches - #16 by DaneLLL

Please check if you can modify to fit your use-case and we can run it to replicate the issue. For further investigation, we would need to reproduce it first.