Access NvDsMetadata in GStreamer plugin buffer

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

How are NvDsMetadata moved through GStreamer buffers?
i.e., I want to access the signed frame_number of a frame in another branch on it’s fakesink for example, I seem to not be able to access the batch metadata…

def ex_probe(pad, info, user_data):
    gst_buffer = info.get_buffer()
    if not gst_buffer:
        print("Unable to get GstBuffer")
        return Gst.PadProbeReturn.OK

    batch_meta = pyds.gst_buffer_get_nvds_batch_meta(hash(gst_buffer))
    if not batch_meta:   ### <<<< ----- this is always true
        print("No batch meta found")
        return Gst.PadProbeReturn.OK

    try:
        for l_frame in batch_meta.frame_meta_list:
           (...)
           (...)

r_fakesink = pipeline.get_by_name("r_fakesink")
sinkpad_r_fakesink = r_fakesink.get_static_pad("sink")
if not sinkpad_r_fakesink:
    sys.stderr.write("Unable to get fakesink R")
else:
    sinkpad_r_fakesink.add_probe(Gst.PadProbeType.BUFFER, ex_probe, 0)

• Hardware Platform (Jetson / GPU) Jetson Xavier AGX
• DeepStream Version 6.3
• JetPack Version (valid for Jetson only) 5.1.2
• Issue Type( questions, new requirements, bugs) Question

3

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

What is your pipeline? The code looks fine.
Can you provide sample code that reproduces the problem?

4

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